Cisco VoIP Call Leg Paths

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Cisco VoIP Call Leg Paths Powered By Docstoc
					Cisco VoIP Call Leg Paths                                                                                                                                                                                                                                                                                                                                                                                                                                                                           VoIP Billing Platform
 A voice call over a packet network is segmented into discrete call legs that are
 associated with dial-peers (a dial-peer is associated with each call leg).                                                                                                                                                                                                                                                                                                                                                                                                                               Cisco AS5400 Routers
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      Cisco AS5400
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                SERIES
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              6




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              4
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             7




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             5
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             AC OK
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             DC OK
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             Database
                                                                                                                                                                       E0/0 (Remote router)
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             OTF




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              2                                                                                                                                                              3



                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             AC OK




                                                                                                                                                                       h323-gateway voip interface
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             DC OK
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             1               OTF
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      ALARM

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                T1                                             LNK                          LNK                       0K
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                T0                                   DTS       ACT FE0          FE1         ACT CON       AUX




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      NO


                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               NC
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           P
                                                                                                                                                                       h323-gateway voip id XYZVOIP ipaddr 192.16.4.237 1718                                                                                                                                                                                                                                                                           Cisco AS5400
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 SERIES
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  6                                                                                                                                                              7




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              AC OK
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  4                                                                                                                                                              5            DC OK




                                                                                                                                                                       h323-gateway voip h323-id sitename
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               OTF




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  2                                                                                                                                                              3



                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              AC OK




                                                                                                                                                                       h323-gateway voip tech-prefix sitenumber
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              DC OK
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 1             OTF




A gatekeeper is an H.323 entity on a                                                                                                                                                                                    Outbound                                                                                                                                                                                                                                                                                  T1
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  T0
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           ALARM



                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      DTS
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   LNK
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   ACT FE0          FE1
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             LNK
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             ACT CON        AUX
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       0K




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       NO


                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                NC
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            P
LAN that provides address translation                                                                                                                                                                                                                                                                   Remote debit cards, 1+                                                                                                                        Call leg POTS                                                                                                                          IVR au file processing                                                                                                                                   radius-server host
and control access to the LAN for                                                                                                                                                                                                                                                                              and 011 calls                                                                                                                          (via AS5400)
                                                                                                                                                                                                                                                                                             1786976ccxx                                                                                                                                                                                                                                                                                                                                                                                                                                              10.231.81.89
H.323 terminals and gateways       192.16.4.237                                                                                                                                                     Cisco 3725 Router                                                                                          route to RAS
                                                                                                                                                                                                                                                                                                                                                                                                                      meridia
              c3725-ix-mz.123-9.bin         2                                                                                                3
                                                                                                                                                                                                                                                                                                         XYZ Network                                                                                                   n1
                                            1
                                                                                                                                                       ACT
                                                                                                                                                   100 Mbps
                                                                                                                                                      LINK
                                                                                                                                                                                            ACT
                                                                                                                                                                                               W2

                                                                                                                                                                                            100 Mbps
                                                                                                                                                                                            LINK                                        CF
                                                                                                                                                                                                                                               W1                          W0
                                                                                                                                                                                                                                                                                                          Backbone
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              E0/0
                                                                                                                                                       FASTETHERNET 0/1       FASTETHERNET 0/0                                               Cisco 3725    CONSOLE   AUX




                                            XYZ_BBN_Gatekeeper                                                                                                                                                                                                                   E0/0
                                            12.3(9)                                                                                                                                                                                                                                                                                                                                                                                                                                                                           h323-gateway voip interface
  A protocol called Registration,                                                                                                                                                                                                                                                h323 interface                                                                                Inbound to
                                            gatekeeper                                                                                                                                                                                                                                                                                                                                                                                                                                                                        h323-gateway voip id XYZVOIP ipaddr 192.16.4.237 1718
Admission, and Status (RAS) is                                                                                                                                                                                                                                                   h323 t120 bypass                                                                              Remote PBX
                                             zone local XYZVOIP xyzcorp.net                                                                                                                                                                                                                                                                                                                                                                                                                                                   h323-gateway voip h323-id PRIGW4.MIA
used between the gateway and                                                                                                                                                                                                                                                                       Call leg VoIP                                                                (735xxxccc)
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              h323-gateway voip tech-prefix 1
the gatekeeper. This allows the                                                                                                                                                                                                                                                                    Dial-peer 1                                                                                                                                                                                                                h323-gateway voip tech-prefix 011
  gateway to register the E.164             E0/0
 addresses with the gatekeeper              h323-gateway voip interface                                                                                                                                                                                                                                                                                                                                                                                                                              192.16.4.64                                                                                                           Cisco 3660 Router
                                            h323-gateway voip id XYZVOIP ipaddr 192.16.4.237 1718                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               CISCO3660-MB-1FE
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   Each gateway, 3660, is
                                            h323-gateway voip h323-id PRIGW3.MIA                                                                                                                                                                                                                                                                                                                                                       Call leg VoIP                                                                      R




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       VCC OK                                                                                                     FDX                          1
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   registered with the local
                                                                                                                                                                                                                                                                                                                                                                                                                                       Dial-peer 3
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  LINK
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       SYSTEM                                                                                                     100Mbps                      0
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     NO P NC                                                                                                   PCMCIA



All VoIP packets are made up of two
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      ALARM




                                            h323-gateway voip tech-prefix 1
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 10/100 ETHERNET 0/0         CONSOLE     AUX
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           250V~5A




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   gatekeeper.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            30V 5A




components: voice samples and IP/UDP/
RTP headers. Although the voice samples     h323-gateway voip tech-prefix 011                                                                                                                                                                                                                               SYST          RPS
                                                                                                                                                                                                                                                                                                                                 1   3   5   7   9    11   13   15   17   19   21   23   25   27   29   31    33   35   37   39   41   43   45   47    Catalyst 2950 SERIES
                                                                                                                                                                                                                                                                                                                                                                                                                                                                        1
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               NM-HDV




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        BANK
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          4
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                BANK
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  3
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        BANK
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          2
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               BANK
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 1
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      BANK
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        0
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     VWIC
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     2MFT-
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     T1-DI
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             CTRLR T1 1
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          AL
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          LP
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          CD
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               CTRLR T1 0
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            VO


                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            EN

                                                                                                                                                                                                                                                                                                          STRT UTIL DUPLXSPEED



are compressed by the Digital Signal
                                                                                                                                                                                                                                                                                                                                                                                                                                                                        2




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 High Density Voice Network Modules
                                                                                                                                                                                                                                                                                                                   MODE          2   4   6   8   10   12   14   16   18   20   22   24   26   28   30   32    34   36   38   40   42   44   46   48                                                                                   NM-HDV                                                                           AL
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               NM-HDV                                                                     AL
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 VWIC                  LP                                                                            VWIC                 LP




                                                192.16.4.63
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 2MFT-                 CD                                                                            2MFT-                CD




                                                                                                                                                                           Cisco 3660 Router
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 T1-DI                                                                                               T1-DI




                                                                                                                                                                                                                                                                                                         Cisco 2950G Switch
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         CTRLR T1 1         CTRLR T1 0                                                                       CTRLR T1 1        CTRLR T1 0




Processor (DSP) and may vary in size                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 BANK   BANK     BANK    BANK    BANK                                                VO             BANK   BANK     BANK   BANK   BANK                                                  VO
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       4      3        2       1       0                                                                  4      3        2      1      0




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      NM-HDV
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         EN




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               NM-HDV
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            EN


                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 NM-HDV with one (1) VWIC-2MFT-T1-DI
based on the codec used, these headers                                                                                                                                                                                                                                                                   192.16.4.5
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       AL                                                                                                 AL
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 VWIC                  LP                                                                            VWIC                 LP
                                                                                                                                                                                                                        CISCO3660-MB-1FE
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 and four (4) PVDM-12s
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 2MFT-                 CD                                                                            2MFT-                CD
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 T1-DI                                                                                               T1-DI
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         CTRLR T1 1         CTRLR T1 0                                                                       CTRLR T1 1        CTRLR T1 0
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     BANK   BANK     BANK    BANK    BANK                                                VO             BANK   BANK     BANK   BANK   BANK                                                  VO
                                                                      R                                                                                                                                                                                                                                                                                                                                                                                                                                                                                4      3        2       1       0                                                                  4      3        2      1      0
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         EN                                                                                                 EN



are a constant 40 bytes in length. When            VCC OK                                                                                                        FDX                                     1




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             PRIGW4.MIA
                                                                                                                                                                 LINK




compared to the 20 bytes of voice
                                                   SYSTEM                                                                                                        100Mbps                                 0
                                                                                                         NO P NC                                                                                                      PCMCIA




                                                                                                                                                                                                                                                                                                                                                                                                                             Call leg POTS
                                                                                           ALARM                                                 10/100 ETHERNET 0/0       CONSOLE          AUX




                                                                                                                                                                                                                                                                                All voice cards:
                                                                                               250V~5A
                                                                                                30V 5A



                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 The session target in the dial–peer
samples in a default G.729 call, these                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       12.3(10a)                                                                                                                                           voice nnnn voip points to Registration,
headers make up a considerable amount                                                                                                                                                                                                                                           codec complexity high                                                                                                                             (via PBX)
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 Admission, and Status (RAS). RAS
of overhead. Using cRTP, these headers           NM-HDV                                                                   AL
                                                                                                                                                             NM-HDV                                                                AL




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 defines where the gateway will register
                                                                                                     VWIC                 LP                                                                                  VWIC                 LP
                                                                                                     2MFT-                                                                                                    2MFT-




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      dial-peer voice 5563 voip
                                                                                                                          CD                                                                                                       CD
                                                                                                     T1-DI                                                                                                    T1-DI
                                                                                                             CTRLR T1 1        CTRLR T1 0                                                                             CTRLR T1 1         CTRLR T1 0




can be compressed to two or four bytes.                     BANK
                                                              4
                                                                   BANK
                                                                     3
                                                                          BANK
                                                                            2
                                                                                 BANK
                                                                                   1
                                                                                        BANK
                                                                                          0
                                                                                                                                            VO


                                                                                                                                            EN
                                                                                                                                                                       BANK
                                                                                                                                                                         4
                                                                                                                                                                              BANK
                                                                                                                                                                                3
                                                                                                                                                                                     BANK
                                                                                                                                                                                       2
                                                                                                                                                                                             BANK
                                                                                                                                                                                               1
                                                                                                                                                                                                       BANK
                                                                                                                                                                                                         0
                                                                                                                                                                                                                                                          VO


                                                                                                                                                                                                                                                          EN


                                                                                                                                                                                                                                                                                High Density Voice Network Modules
                                                 NM-HDV                                                                                                      NM-HDV                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              with the gatekeeper, sends admission
This compression offers significant VoIP
                                                                                                                          AL                                                                                                       AL




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       description To Remote site
                                                                                                     VWIC                 LP                                                                                  VWIC                 LP




                                                                                                                                                                                                                                                                                NM-HDV with one (1) VWIC-2MFT-T1-DI
                                                                                                     2MFT-                CD                                                                                  2MFT-                CD
                                                                                                     T1-DI                                                                                                    T1-DI
                                                                                                             CTRLR T1 1        CTRLR T1 0                                                                             CTRLR T1 1         CTRLR T1 0
                                                            BANK
                                                              4
                                                                   BANK
                                                                     3
                                                                          BANK
                                                                            2
                                                                                 BANK
                                                                                   1
                                                                                        BANK
                                                                                          0
                                                                                                                                            VO                         BANK
                                                                                                                                                                         4
                                                                                                                                                                              BANK
                                                                                                                                                                                3
                                                                                                                                                                                     BANK
                                                                                                                                                                                       2
                                                                                                                                                                                             BANK
                                                                                                                                                                                               1
                                                                                                                                                                                                       BANK
                                                                                                                                                                                                         0
                                                                                                                                                                                                                                                          VO


                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 requests for each call, and conducts
bandwidth savings. For example, a default
                                                                                                                                            EN                                                                                                            EN




                                                                                                                                                                                                                                                                                and four (4) PVDM-12s (3 TI 549 DSPs)
G.729 VoIP call consumes 24 Kb without                                                                                                                                                                                                                                                                                                                                                                                                                                                                 destination-pattern 4...                                                                                                                                                                                                                  certain status information polling for
cRTP, but only 12 Kb with cRTP enabled.
                                            PRIGW3.MIA                                                                                                                                                                                                                                                                                                                                                                                                                                                 progress_ind setup enable 3                                                                                                                                                                                                               calls.
                                            12.3(10a)                                                                                                                                                                                                                                                                                                                                                                                                                                                  session target ras
Because cRTP compresses VoIP
calls on a link-by-link basis, both
                                                                                                                                                                                                                                                                                                                                 framing esf                                                                                                                                                           dtmf-relay cisco-rtp h245-alphanumeric
ends of the IP link need to be                            Up to 23 channels of high-complexity voice or                                                                                                                                                                                                                           linecode b8zs                                                                                                                                                       codec g729r8 bytes 60
configured for cRTP.                                      fax-relay (G729)                                                                                                                                                                                                                                                        pri-group timeslots 1-24                                                                                                                                             fax rate 14400
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       ip qos dscp cs5 media
                                                                                                                                                                                                                                                                                       Call leg POTS
                                                                                                                                                                                                                                                                                          Dial-peer 2                                                                                                                                                                                                                                                       Useful voice related commands:
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            >sh gatekeeper status
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            >sh gatekeeper endpoints
                                                                                                                                                                                                                                                                                                                                                                                                                                                                              Meridian 1
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            (Status of all registered endpoints for a gatekeeper)
                                                                                                                                                                                                                                                           dial-peer voice 5551 pots                                                                                                                                                                                                                                                                        >sh gatekeeper gw-type-prefix
                                                                                                                                                                                                                                                             description US Domestic Calls                                                                                                                                                                                                                                                                  (Shows which gateways can handle which prefixes)
                                                                                                                                                                                                                                                             preference 1                                                                                                                                                                                                                                                                                   >sh gatekeeper calls
      voice call carrier capacity active                                                                                                                                                                                                                                                                                                                                                                 Meridian 1
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            (Shows active calls on gatekeeper)
                                                                                                                                                                                                                                                             destination-pattern 1..........                                                                                                                                                                                                                                                                                                    >csim start <number>
      voice rtp send-recv                                                                                                                                                                                                                                                                                                                                                                                                                                                                  Public Switched                                                  >sh call active voice brief
                                                                                                                                                                                                                                                             port 1/0:23                                                                                                                                                                                                                                                                                                                        (Hidden command dials out w/o handset)
      !                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    Telephone                                                        (Show the active call table)
                                                                                                                                                                                                                                                             forward-digits all                                                                                                                                                                                                            Network                                                          >sh call his voice brief
      voice service voip                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    >sh voice call summary
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                >debug h225 asni
                                                                                                                                                                                                                                                           !                                                                                                                                                                                                                                                                                                                                    >debug ras
        modem passthrough nse codec g711ulaw                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                (shows call status for
                                                                                                                                                                                                                                                           dial-peer voice 5552 pots                                                                                                                                                                                                        PSTN                                                              all voice ports on the gateway) >debug voip ccapi inout
      !                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         (shows call setup information/sign
                                                                                                                                                                                                                                                             description International Calls
      voice class codec 10                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  >sh voip rtp connections
                                                                                                                                                                                                                                                             destination-pattern 011T                                                                                                                                                                                                                                                                       >sh voice dsp (DSP ID information)
        codec preference 1 g729r8 bytes 60
                                                                                                                                                                                                                                                             port 1/0:23                                                                 PBX                                                                                                                                               Outbound                                                         >sh call his voice brief | inc Orig
        codec preference 2 g723r63
                                                                                                                                                                                                                                                             forward-digits all                                                                                                                                                                                                            POTS calls                                                          >sh dialplan number <number>
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               (Shows which dialpeer will be selected)

				
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