Introduction PBX by doculearning

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									 INTRODUCTION TO PBX

PRIVATE BRANCH EXCHANGE
                                     TELEPHONE NETWORK (PSTN)
                  Provincial Area                                        To international
                       SC                        ITSC          International telephone switching center
subscriber
                       PC
             LE



METROPOLITAN Area                   SC                                    SC            Secondary center
                                              Tandem

                                              GSP TA
                                                  Network
                                                                                  TE         Tandem exchange
 Subscriber                         TE             RCU
                                                            subscriber
                                                                     LE                                    LE   Local exchange
                  LE                     LE
                                                                                                                   Remote

                                                                                                                     subscriber
                                     PBX LOCATION
                                            subscriber
                                                         Subscriber line
                                                                              Local exchange
Extension                 Subscriber line


            PBX                                                                     LE
                                                                                                              TE


                                     Remote switch                                       Digital trunk(PCM)
              Subscriber line                                  Digital trunk (PCM)



                                                                 Subscriber line


                                      PBX                                                          LE


            Extension                                                  subscriber
EXTENSION         PBX
                                 CO LINE
 111
                                500-1000

 222                            500-1001 PSTN           500-1111

                                500-1003
 333

                                      TIE LINE to PBX
            ATTENDENT CONSOLE
   Traffic cases

 1. Internal Call        Extension to Extension
 2. Operator Call        Extension to Operator
 3. Outgoing Call        Extension to PSTN
 4. Incoming Call        PSTN to Extension via operator
 5. Transit Call         PBX TO PBX

 PBX TYPE
1. PMBX Private Manual Branch Exchange
2. PABX Private Automatic Branch Exchange
EXTENSION         PBX
                                 CO LINE
 111
                                500-1000

 222                            500-1001 PSTN           500-1111

                                500-1003
 333

                                      TIE LINE to PBX
            ATTENDENT CONSOLE
EXTENSION                              PBX                            660-2222
       Dial Access code 9 or 0
                                                      CO LINE
 111
                                                     500-1000

 222                                                 500-1001 PSTN           500-1111

                                                     500-1003
 333

                                                           TIE LINE to PBX
                                 ATTENDENT CONSOLE
EXTENSION         PBX             INTERFACE TOPSTN

 111


 222                                         PSTN      500-1111


 333                            TIE line



            ATTENDENT CONSOLE              PBX      Extension
      TYPE OF INTERFACE TO PSTN
1. CO line (analog subscriber line)
   - Individual line
   - Multi - Hunting Group
2. PCM DID
3. BAI - ISDN
4. Primary - ISDN
5. TIE line analog Interface between PBXs
               Individual line interface

EXTENSION           PBX
                                           CO LINE
 111
                                      500-1000

 222                                  500-1001 PSTN             500-1111

                                       500-1003
 333

                                              TIE LINE to PBX
            ATTENDENT CONSOLE
               Multi hunting group line interface

EXTENSION           PBX
                                    Pilot number 500-1000
 111
                                     500-1000

 222                                 500-1001 PSTN            500-1111

                                     500-1003
 333
                                    Member 500-1001,501-1003
                                            TIE LINE to PBX
            ATTENDENT CONSOLE
               Incoming call from PSTN without DID

EXTENSION             PBX             1. Call via operator

                                  CO LINE                        500-1111
 111
                                  500-1000
                                  500-1001 PSTN
 222
                                  500-1003

 333
                                  2. Call via DISA(Direct in to station
                                     access) with IVR (interactive voice
                         IVR         response)
  ATTENDENT CONSOLE
                         Incoming call with DID

EXTENSION                PBX
                                       Digital trunk interface
 111
                                                                 PSTN
 222
                                       DTMF and MFCR2                   500-1111
                                       signaling
333

       Interface with digital trunk (PCM E1)
       Not used Operator
       Call from PSTN direct to Extension
                            TIE line interface

EXTENSION                  PBX                                PBX
                                                                    666

 111

 222
                                          TIE line trunk            555
333

            Connected between PBXs
            used Proprietary interface protocol
            used 4 wire E&M trunk or 2 wire trunk Interface
          CO line Interface Signaling

1.line Signaling       Muti-hunting Function
  - dc loop             - Sequential type
  - reverse polarity    - random type
  - reverse pulse      Multi-hunting member
  - ground start
  - 16 khz
                        - pilot number
2. Addressing signal    - member with DN
   - DP                 - member without DN
   - DTMF               - Member with slip function
                        - Member without slip function
                            CO line interface


EXTENSION                   PBX
                                            CO line interface
                DTMF
                                                                     P
 111                                                                 S
                                                                     T
 222
                 DP                                                  N
                                                                                   500-1111
 333    Subscriber line interface    CO line interface
                                                        Line interface circuit
 Register signaling                          Line signaling
 1.Dial pulse(DP)                            1.DC loop            4.ground start
 2.Dual tone Multi-frequency(DTMF)           2.Reverse polarity 5.16 kHz
                                             3.Reverse Pulse
                 CO line Interface Signaling
1. Addressing signaling (register signaling)
         1. 1 Dial pulse (DP)



         1.2 Dual tone multi frequency(DTMF)
                   1209hz 1366hz        1477hz
        697 hz         1         2             3
         770hz         4         5             6
        852hz          7         8             9
        941hz          *         0             #
                   CO line Interface Signaling
2. line Signaling                  PBX                              Local exchange
  2.1 dc loop
  2.2 reverse polarity                                                   -
  2.3 reverse pulse                            DC loop                  48 v
  2.4 ground start                                                       +
  2.5 16 kHz                                    Speech circuit
                                    CO line interface                 Line circuit
                             Subscriber line interface
    CO line interface function
             - detect ringing signal from LE
             - Send on hook/off hook signal to line circuit
             - detect line signaling from LE for start charging system
             - conversation channel
                   REVERSE POLARITY                     Local exchange

               PBX                                      RELAY
                                                             -
                           DC loop                          48 v
                                                                  +
                           Speech circuit               control
A sub.          CO line interface                        Line circuit
                                                                                B sub.
         After subscriber B answer control function in line circuit control relay
         for reverse dc polarity
                    REVERSE PULSE                        Local exchange

                PBX
                                                                 -
                             DC loop                            48 v
                                                                   +
                            Speech circuit               control
A sub.           CO line interface                        Line circuit
       Line circuit                 PULSE                                            B sub.
          After subscriber B answer control function in line circuit send pulse to
          CO line interface for charging system
                  GROUND start                       Local exchange
               PBX


                                                   -
                           DC loop                48 v
                                                   +
                                 SLV
                                                      G
                           Speech circuit
A sub.                                                                B sub.
                 CO line interface                   Line circuit
         Subscriber line interface                  Ground signal
                                             Sleeve Relay
            Used ground signal for send charging signal to PBX
                   16 KHz                           Local exchange
               PBX


                                                  -
                           DC loop               48 v
                                                  +

                           Speech circuit
A sub.                                                                   B sub.
                 CO line interface                  Line circuit
         Subscriber line interface
                                            Osc 16KHz
            Used 16 KHz signal send from LE to PBX for charging system
                                       TO type for hunting method
                Multi hunting group
                                       1.Sequence hunting
EXTENSION      PBX                     2. Random hunting
                         Pilot number 500-1000
 111
                                 500-1000

 222                             500-1001       PSTN         500-1111

                              EL=xxxxxx
 333
                                                Member with DN
                          Member without DN
                                 Member with slip/without slip
            ATTENDENT CONSOLE for incoming call from LE
  PABX Service Feature
1. MUSIC ON HOLD
2. DISA direct into station access and OGM (outgoing message unit)
3.outward dialing
4.Class of service (outgoing call to CO line)
5.speed dial
6.pick up group
7. CO line automatic disconnect
8. HOT LINE with delay/without delay
9.call forwarding
10.call fording without answer
11.call forwarding with busy
12 call waiting
13.conference between Co line and extension
14 REDIAL
                        Service feature call pick up group
                                      Call from PSTN to extension number 111 but
EXTENSION                PBX extension 222 or 333 can be answer
        ringing
                                            500-1000
 111
           answer                           500-1001
 222                                                      PSTN         500-1111
            answer                            500-1003

 333

Call pickup group
                     ATTENDENT CONSOLE
                    Service feature call forwarding
                                  Call from PSTN to extension number 111 but
EXTENSION            PBX system forward call to extension number 222
                                        500-1000
 111
       ringing                          500-1001
 222                                                  PSTN         500-1111
                                          500-1003

 333                               3 type for forwarding
                                   1.forward no condition
                                   2.forward for busy
                 ATTENDENT CONSOLE 3.forward no answer
                         Service feature conference call

EXTENSION                 PBX              Conference circuit

                                             500-1000
 111
                                             500-1001
 222                                                       PSTN        500-1111
                                               500-1003

 333
 Conference circuit                              2 type for conference
                                                 1. 1 Extension 2 PSTN SUB.
                                                 2. 1 PSTN sub. 2 Extension
                      ATTENDENT CONSOLE
operator
                                            DIGITAL
               SLC-D                         TRUNK
   Digital telephone                       ANALOG     PSTN
                SLC-D                       TRUNK
    Analog telephone
               SLC-A                        TIE.T     Tie line

  Voice memory                                         O&M
             VMI                             I/O


               I/O                          I/O              Music
Hotel-system
                        PBX architecture
SLC-D : Digital Subscriber line circuit
SLC-A : Analog Subscriber line circuit
VMI : Voice memory interface
I/O : Input Output device interface
TRUNK: digital/analog trunk interface to PSTN
TIE.T : TIE line Trunk interface to PBX
                                              DID PBX

               GSP
                                                                           DID PBX
6020020
                               DTI           DTI (PCM30)          DTI                                    123
                                                             E1
6020030
                                                                                                               456
                                                             E1                                                 300
           Exchange code                  Signaling                       Exchange code
           602                            - DTMF,MFC R2                   8051
                                          - Primary (DSS1)
    Interface between GSP and PBX
                                                     Call set up
          - DTI (PCM30) digital trunk interface
                                                          - Call direct from public network to PBX extension
          - Two type of signaling
                                                            (EX. Dial 8051123)
            - analog (MFC R2 and DTMF)
                                                          - call from PBX to public dial access code (EX. 9 or 0)
            - Digital primary rate access (DSS1)
                             Call flow from GSP to DID (MFC R2)
                      GSP                                   DID PBX
6020020
                            DTI DTI (PCM30)           DTI                     123
                                                   E1
6020030
                                                   E1
                                      MFC R2                                        456
                Exchange code                                Exchange code
                602                                          8051
     Dial 02 8051 123
                                          Sizure
                                       Sz.ACK
                                     Digit “0”
                                     A1
                                Digit “3”                            MFC R2
                                       A3
                                       Cat. 2(ord.)
                                      B1(Free with charge)       ringing
          Ring tone                                             Answer
                                           Answer
                                      Conversation
                        Call floe from DID to GSP (DTMF)

6020020
                             DTI       DTI (PCM30)         DTI                              123
                                                      E1
6020030
                                                      E1
                                         MFC R2                                                   456
               Exchange code                                     Exchange code
               602                                               8051
                                                                   Dial access code(9or0)
                                     Sizure
                                    Sz.ACK
                                                                         Dial tone
                                                                   Dial digit (DTMF) “0”
               DTMF                  DTMF (digit 0)
                                                                    Dial digit (DTMF) “0”
                                    DTMF (digit 0)
          ringing                    Ring tone
                    Answer           Answer

                                   Conversation
                   Trunking Access


        GSP                                   ISP (Remote access server)
                          Trunk group
                  DTI                        DTI
                                        E1 PCM30


     Data base                          E1 PCM30

                       Signaling interface    Access number 6000000
Digit analysis 6000000 - MFC R2 Signaling
Routing                 - CCS No7 Signaling
Trunk group

								
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