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					                      Flexgrow Option 2

  FlexGrow Option 2 Voice and DID Signaling
  Testing Utilizing the CXR Telcom – Halcyon
 704A-430, 704A-460, 704A-PKG1, 704A-PKG2,
704A-PKG3, 704A-NTS1 or 704A-NTS2 Test Sets


Purpose: : To provide explanation and procedures for FlexGrow Option
2 Voice and DID Signaling testing Utilizing the CXR Telcom – Halcyon
704A-430, 704A-460, 704A-PKG1, 704A-PKG2, 704A-PKG3, 704A-
NTS1 or 704A-NTS2 Test Sets




Personnel affected: Personnel affected: All Verizon National Operations
Technicians with responsibility for the testing of Verizon’s FlexGrow
Option 2



Effective Date: October 15, 2003




Contacts: John Mikalik, Specialist, I&M Process Management, 972/718-
6717




1
What is FlexGrow Option 2?

FlexGrow Option 2 is a Verizon service for delivering voice and data to small, medium and large business
customers over traditional twisted-pair copper facilities. FlexGrow Option 2 allows up to 24 separate lines
of service to be delivered on a channelized basis over a T1facility, greatly reducing the number of copper
pairs serving the customer’s physical address. For example, twenty-four voice trunks could be delivered
over a T1 that utilizes only two cable pairs, reducing the number of cable facilities required for each
customer location. See Figure 1.

How is FlexGrow Option 2 provisioned?

FlexGrow Option 2 utilizes two “smart channel bank” concentrators; one located in the serving central
office and one located at the customer’s physical address. One or more T1 HICAP circuits connect the two
units.

At the regulated telecommunications demarcation (demarc), FlexGrow-based services can delivered to the
customer in the same manner as traditional twisted-pair copper utilizing jumper wire connections at “66”
blocks. This allows easy access for turn-up testing and troubleshooting (please refer to Fig. 1.). At the
central office, services are wired to the Main Distributing Frame (MDF) and connected to the FlexGrow
equipment via jumper wire connections. This method also provides easy access for turn-up testing and
troubleshooting. (Please refer to Fig 1.).

What FlexGrow Option 2 testing does this M&P describe?

This M&P will provide detailed instructions for testing voice services at the central office or field locations
utilizing the CXR Telcom – Halcyon 704A-430, 704A-460, 704A-PKG1, 704A-PKG2, 704A-PKG3,
704A-NTS1 or 704A-NTS2 Test Sets. Standard material codes are provided in appendix A.

This M&P assumes the FlexGrow system is operating normally at the T1 interface with no line errors or
faults.


What can go wrong with FlexGrow Option 2?

When properly installed and tested, FlexGrow Option 2 provides high quality, reliable service. However,
DID troubles can include:
 Can’t complete inward calls
 Noisy talk path
 Can’t hear/be heard

These troubles are typically caused by:
 Mis-optioned trunks at customer CPE
 Mis-optioned trunks at central office switch
 Mis-optioned FlexGrow equipment
 Improper jumper-wire connections (including reverse polarity)



How can these troubles be analyzed and corrected?

With proper turn-up testing, troubles are easily identified and sectionalized to determine source of fault.
Proper testing includes:
 Call-thru testing for Direct Inward Dialing (DID) trunks
 Examination of proper signaling and digit parameters




2
These tests are easily completed utilizing the CXR Telcom – Halcyon 704A-430, 704A-460, 704A-PKG1,
704A-PKG2, 704A-PKG3, 704A-NTS1 or 704A-NTS2 Test Sets.

Step-by-Step Test Procedures for DID testing

Utilizing Fig 1, determine the appropriate location for testing. For example, the following test-points are
identified as “Location A1, A2, Z1, Z2”, where “A” designates the central office location, and “Z”
designates the customer premise. Additionally, designation “1” is for utilizing the 704A to mimic a PBX,
and designation “2” is for utilizing the 704A to mimic a central office switch.

LOC A1

Allows trunks to be tested directly out of the central office switch, eliminating any FlexGrow or CPE. This
is labeled “Emulate PBX”, and the Halcyon 704A test set is configured to respond as a properly
functioning PBX or Key System.

This mode allows incoming test calls to be answered and voice traffic verified. Incoming digits can also be
analyzed for errors. If calls fail, trouble is in central office switch provisioning, hardware failures (line card,
etc.), or jumper-wire connections (including reverse polarity).

LOC A2

Allows signaling sequence to be tested from the central office MDF utilizing a Halcyon 704A instead of the
central office switch, testing through all FlexGrow and CPE components. This is labeled “Emulate C.O.,
and the Halcyon 704A test set is configured to respond as a properly functioning central office switch.

This mode allows test calls to be launched from the 704A through the FlexGrow devices and all the way to
the CPE/PBX. If functioning properly, stations on the PBX can answer the call, yielding full data for pre-
wink, wink and answer delay timing signals (viewed on the 704A), and voice traffic verified. If calls fail,
trouble is in central office jumper-wire connections, FlexGrow provisioning or hardware failures, PBX/Key
System provisioning or hardware failures, or customer’s jumper-wire connections (including reversed
polarity).

LOC Z1

Allows the customer’s PBX or key system to be isolated from the public telephone network and tested with
the 704A replacing all central office and FlexGrow equipment. This is labeled “Emulate C.O., and the
Halcyon 704A test set is configured to replicate a properly functioning central office switch.

This mode allows test calls to be launched from the 704A directly into the customers CPE (PBX or Key
System). If functioning properly, stations on the PBX can answer the call, yielding full data for pre-wink,
wink and answer timing signals (viewed on the 704A), and voice traffic verified. If calls fail, trouble is in
PBX/Key System provisioning or hardware failures, or customer’s jumper-wire connections (including
reversed polarity).

LOC Z2

Allows trunks to be tested directly out of the FlexGrow equipment located on the customer premise. This
is typically called “demarc testing” as it verifies proper operation of all Verizon-owned network
components. This is labeled “Emulate PBX”, and the Halcyon 704A test set is configured to respond as a
properly functioning PBX or Key System.

This mode allows incoming test calls to be answered and voice traffic verified. Incoming digits can also be
analyzed for errors. If calls fail, trouble is in central office switch provisioning, hardware failures (line card,
etc.), central office jumper-wire connections (including reverse polarity), FlexGrow provisioning or
hardware failure, or Verizon jumpers at the regulated demarc (including reverse polarity).



3
Step-by-step testing for DID trunks at LOC A1 Emulate PBX
(Also available on CXR Telcom FlexGrow Opt 2 Testing Quick Reference Guide)

1.   Setup
     a. Power “ON” 704A-xx test set by depressing rocker switch at top end of unit
     b. From main menu, select F2 TIMS
     c. Insert TIMS template (NOTE- for 704A models 430 & 460, omit steps b. and c.)
     d. To set up interface, repeatedly press TERM until the 2-wire interface LED is lit with 600Ω
         Impedance

2.   Emulate PBX
     a. Press Signaling TEST (also #7 on keypad)
     b. Press keypad #1 to select DID Mode
     c. Press keypad #2 to select PBX
     d. If DTMF and Wink-Start trunk, skip steps e. and f. below
     e. Press NEXT to select digit-type if other than DTMF (i.e.:MF or Dial-Pulse)
     f. Press NEXT to select call type if other than wink-start (i.e.: immediate start)
     g. Press ESC (Escape) Set is now in PBX mode.
     h. Connect two-wire DID trunk to 704A via 2W/4W RJ jack or 2W Bantam at top end of set
     i. Verify screen of 704A indicates proper setup information
                 1. Verify CO: ON-HOOK (if OFF-HOOK, ask C.O. to idle trunk)
                 2. Verify Waiting for OFF-HOOK
     j. From another line, dial a DID number associated with the trunk-under-test, or request Originate
        end of circuit (C.O.) to go off-hook and send digits
     k. The 704A will WINK and then display received digits. NOTE- Tip/Ring polarity must be correct.
        Loop current is supplied from PBX (704A) on DID trunks. If call fails, reverse Tip/Ring at 704A,
        repeat test. On DID trunks, customer must specify number of digits expected at time of order.
        For example, calling 212-555-1212 into a DID trunk will result in only the last four digits sent to
        the PBX . During an incoming call, the C.O. goes OFF-HOOK, pulling loop current from the
        PBX. In response, the PBX “WINKS”, or reverses polarity to the C.O. for a brief period, telling
        the C.O. to send the last four digits of the incoming call. The C.O. responds by sending the last
        four digits dialed.
     l. Press OFF/ON HOOK on keypad to return reverse battery supervision (answer incoming call)
        NOTE- T/R RVRSD LED will glow, indicating above condition.
     m. Verify two-way voice conversation by connecting “butt-in” set across line
     n. Press DATA RESULTS to view digit signal power levels
                 DTMF signals are a combination of one high tone and one low tone. To be properly
                 detected and understood by the PBX, the tones must be no less than –22dBm with less
                 than 6dB of “twist”. Twist is just the difference in power levels between the two tones.
                 Verify the received tones are greater than –22dBm (between –6dBm and –22dBm) by
                 pressing NEXT to move the underscore indicator to each digit received.
     n. Press TIMING RESULTS to view digit timing and inter-digit delay
                 After receiving WINK from PBX, C.O. sends DTMF digits at specific intervals of on/off
                 sequencing. If too rapid, PBX cannot distinguish separation of digits. Tones should
                 nominally be 75mSecs on, 75mSecs off. NOTE- the first digit sent is not preceded by
                 off-timing, so may show 0 mSec for 1st digit INTERVAL. This is normal. If digit timing
                 or power results are outside normal parameters, consult Network Operations Center
                 (NOC) for adjustment of central office switching equipment.
     o. Press ESC
     p. Press RCV FREQ LEVEL or XMIT FREQ LEVEL to swap tones, if desired.
     q. When tests are complete,
                 1. Press ESC
                 2. Press #7 on keypad to choose Exit Signaling Mode
                 3. Press #5 on keypad to exit signaling mode




4
Step-by-step testing for DID trunks at LOC A2 Emulate C.O.
(Also available on CXR Telcom FlexGrow Opt 2 Testing Quick Reference Guide)

1.   Setup
     a. Power “ON” 704A-xx test set by depressing rocker switch at top end of unit
     b. From main menu, select F2 TIMS
     c. Insert TIMS template (NOTE- for 704A models 430 & 460, omit steps b. and c.)
     d. To set up interface, repeatedly press TERM until the 2-wire interface LED is lit with 600Ω
         Impedance

2.   Emulate C.O.
     a. Press Signaling TEST (also #7 on keypad)
     b. Press keypad #1 to select DID Mode
     c. Press keypad #1 to select C.O.
     d. If DTMF and Wink-Start trunk, skip steps e. and f. below
     e. Press NEXT to select digit-type if other than DTMF (i.e.:MF or Dial-Pulse)
     f. Press NEXT to select call type if other than wink-start (i.e.: immediate start)
     g. Press ESC (Escape) Set is now in C.O. mode.
     h. Connect two-wire DID trunk to 704A via 2W/4W RJ jack or 2W Bantam at top end of set
     i. Observe T/R RVRSD LED. If illuminated, reverse Tip/Ring connection
     j. Verify screen of 704A indicates proper setup information
                   1. Verify ‘DIAL’ to enter phone number displayed
     k. Press DIAL and enter number using keypad. NOTE- PBX’s require only four digits for incoming
         calls.
     l. Press OFF/ON HOOK to send number
     m. The 704A will display “Waiting For Wink” until wink is received from PBX, then it will send the
         digits. If no wink is received, call will time-out. On DID trunks, customer must specify number of
         digits expected at time of order. For example, calling 212-555-1212 into a DID trunk will result in
         only the last four digits sent to the PBX. During an incoming call, the C.O. goes OFF-HOOK,
         pulling loop current from the PBX. In response, the PBX “WINKS”, or reverses polarity to the
         C.O. for a brief period, telling the C.O. to send the last four digits of the incoming call. The C.O.
         responds by sending the last four digits dialed. Have the dialed number (PBX station) answer the
         call.
     n. When station answers call, observe T/R RVRSD and Rem Off-Hook LEDS illuminate, indicating
         PBX has returned reverse-supervision (answered call).
     o. Verify two-way voice conversation by connecting “butt-in” set across line
      p. Press TIMING RESULTS to view Pre-Wink, Wink and Answer Delay timing results
                   For DID trunks, loop current (battery and ground) are supplied by the PBX, not the C.O.
                   During an incoming call, the C.O. “goes off-hook”, pulling loop current from the PBX.
                   This signals the PBX that a call is arriving. The PBX acknowledges this by a brief
                   reversal of line polarity called a “wink”, which prompts the switch to send DTMF tones
                   to the PBX. When the station answers, polarity is again reversed, completing the
                   connection. The critical parameters are Pre-Wink, Wink and Answer Delay. Pre-Wink is
                   the duration between the C.O. going off-hook and the PBX returning the wink. Wink is
                   the pulse width of the wink, and Delay Answer is the time from delivery of the digits
                   until the PBX answers the call. The exact duration of the above sequence has no set
                   length, but a few rules will be described below. It is more important to determine if the
                   events occur at all. For example, if the PBX never returns a wink, the C.O. never sends
                   the digits. Likewise, if the C.O. does not go “off-hook”, the PBX never winks. Finally,
                   if the station never answers, the PBX never terminates supervision (answers the call).
                   Therefore, the following guidelines are suggested when testing inbound DID calls to
                   PBX/Key System:
                   Pre-Wink- should be greater than .10 seconds (100ms) , but less than 15 seconds.
                   Nominally 1 - 2 seconds. or less. Wink- 225 – 275 ms nominal. Answer delay- will vary
                   depending on configuration of PBX (call-forwarding, voicemail, etc.), but could be from
                   1 second to timeout parameter of C.O. switch. Again, key is to observe events occur at


5
               all. This sequence is quite forgiving, but very short duration Pre-Wink and Wink
               conditions should be adjusted to slightly longer duration’s if trouble persists and/or is
               intermittent. If timing results are outside normal parameters, move to test point Z2 and
               retest. If calls fail at test point Z2, consult Network Operations Center (NOC) for
               adjustment of central office switch and/or FlexGrow equipment.
    q. Press ESC
    r. Press RCV FREQ LEVEL or XMIT FREQ LEVEL to swap tones, if desired.
    s. When tests are complete,
               1. Press ESC
               2. Press #7 on keypad to choose Exit Signaling Mode
               3. Press #5 on keypad to exit signaling mode




6
Step-by-step testing for DID trunks at LOC Z1 Emulate C.O.
(Also available on CXR Telcom Flexgrow Opt 2 Testing Quick Reference Guide)

1.   Setup
     a. Power “ON” 704A-xx test set by depressing rocker switch at top end of unit
     b. From main menu, select F2 TIMS
     c. Insert TIMS template (NOTE- for 704A models 430 & 460, omit steps b. and c.)
     d. To set up interface, repeatedly press TERM until the 2-wire interface LED is lit with 600Ω
         Impedance

2.   Emulate C.O.
     a. Press Signaling TEST (also #7 on keypad)
     b. Press keypad #1 to select DID Mode
     c. Press keypad #1 to select C.O.
     d. If DTMF and Wink-Start trunk, skip steps e. and f. below
     e. Press NEXT to select digit-type if other than DTMF (i.e.:MF or Dial-Pulse)
     f. Press NEXT to select call type if other than wink-start (i.e.: immediate start)
     g. Press ESC (Escape) Set is now in C.O. mode.
     h. Connect two-wire DID trunk from PBX to 704A via 2W/4W RJ jack or 2W Bantam at top end of
        set
     i. Observe T/R RVRSD LED. If illuminated, reverse Tip/Ring connection
     j. Verify screen of 704A indicates proper setup information
                  1. Verify ‘DIAL’ to enter phone number displayed
     k. Press DIAL and enter number using keypad. NOTE- PBX’s require only four digits for incoming
        calls.
     l. Press OFF/ON HOOK to send number
     m. The 704A will display “Waiting For Wink” until wink is received from PBX, then it will send the
        digits. If no wink is received, call will time-out. On DID trunks, customer must specify number of
        digits expected at time of order. For example, calling 212-555-1212 into a DID trunk will result in
        only the last four digits sent to the PBX. During an incoming call, the C.O. goes OFF-HOOK,
        pulling loop current from the PBX. In response, the PBX “WINKS”, or reverses polarity to the
        C.O. for a brief period, telling the C.O. to send the last four digits of the incoming call. The C.O.
        responds by sending the last four digits dialed. Have the dialed number (PBX station) answer the
        call.
     n. When station answers call, observe T/R RVRSD and Rem Off-Hook LEDS illuminate, indicating
        PBX has returned reverse-supervision (answered call).
     o. Verify two-way voice conversation by connecting “butt-in” set across line
     p. Press TIMING RESULTS to view Pre-Wink, Wink and Answer Delay timing results
                  For DID trunks, loop current (battery and ground) are supplied by the PBX, not the C.O.
                  During an incoming call, the C.O. “goes off-hook”, pulling loop current from the PBX.
                  This signals the PBX that a call is arriving. The PBX acknowledges this by a brief
                  reversal of line polarity called a “wink”, which prompts the switch to send DTMF tones
                  to the PBX. When the station answers, polarity is again reversed, completing the
                  connection. The critical parameters are Pre-Wink, Wink and Answer Delay. Pre-Wink is
                  the duration between the C.O. going off-hook and the PBX returning the wink. Wink is
                  the pulse width of the wink, and Delay Answer is the time from delivery of the digits
                  until the PBX answers the call. The exact duration of the above sequence has no set
                  length, but a few rules will be described below. It is more important to determine if the
                  events occur at all. For example, if the PBX never returns a wink, the C.O. never sends
                  the digits. Likewise, if the C.O. does not go “off-hook”, the PBX never winks. Finally,
                  if the station never answers, the PBX never terminates supervision (answers the call).
                  Therefore, the following guidelines are suggested when testing inbound DID calls to
                  PBX/Key System:
                  Pre-Wink- should be greater than .10 seconds (100ms) , but less than 15 seconds.
                  Nominally 1 - 2 seconds .or less. Wink- 225 – 275 ms nominal. Answer delay- will
                  vary depending on configuration of PBX (call-forwarding, voicemail, etc.), but could be


7
                 from 1 second to timeout parameter of C.O. switch. Again, key is to observe events
                 occur at all. This sequence is quite forgiving, but very short duration Pre-Wink and Wink
                 conditions should be adjusted to slightly longer duration’s if trouble persists and/or is
                 intermittent. If timing results are outside normal parameters, request PBX technician
                 troubleshoot PBX hardware or jumper connections (including reversed polarity), or
                 adjust/re-configure PBX trunk parameters. Demonstrate incoming calls can be properly
                 answered by performing tests at test point Z2, allowing customer to observe results.
    q.   Press ESC
    r.   Press RCV FREQ LEVEL or XMIT FREQ LEVEL to swap tones, if desired.
    s.   When tests are complete,
                 1. Press ESC
                 2. Press #7 on keypad to choose Exit Signaling Mode
                 3. Press #5 on keypad to exit signaling mode




8
Step-by-step testing for DID trunks at LOC Z2 Emulate PBX
(Also available on CXR Telcom FlexGrow Opt 2 Testing Quick Reference Guide)

1.   Setup
     a. Power “ON” 704A-xx test set by depressing rocker switch at top end of unit
     b. From main menu, select F2 TIMS
     c. Insert TIMS template (NOTE- for 704A models 430 & 460, omit steps b. and c.)
     d. To set up interface, repeatedly press TERM until the 2-wire interface LED is lit with 600Ω
         Impedance

2.   Emulate PBX
     a. Press Signaling TEST (also #7 on keypad)
     b. Press keypad #1 to select DID Mode
     c. Press keypad #2 to select PBX
     d. If DTMF and Wink-Start trunk, skip steps e. and f. below
     e. Press NEXT to select digit-type if other than DTMF (i.e.:MF or Dial-Pulse)
     f. Press NEXT to select call type if other than wink-start (i.e.: immediate start)
     g. Press ESC (Escape) Set is now in PBX mode.
     h. Connect two-wire DID trunk to 704A via 2W/4W RJ jack or 2W Bantam at top end of set
     i. Verify screen of 704A indicates proper setup information
                  1. Verify CO: ON-HOOK (if OFF-HOOK, ask C.O. to idle trunk)
                  2. Verify Waiting for OFF-HOOK
     j. From another line, dial a DID number associated with the trunk-under-test, or request Originate
        end of circuit (C.O.) to go off-hook and send digits
     k. The 704A will WINK and then display received digits (NOTE- Tip/Ring polarity must be correct.
        Loop current is supplied from PBX (704A) on DID trunks. If call fails, reverse Tip/Ring at 704A,
        repeat test). On DID trunks, customer must specify number of digits expected at time of order.
        For example, calling 212-555-1212 into a DID trunk will result in only the last four digits sent to
        the PBX (or three, depending on customer request). During an incoming call, the C.O. goes OFF-
        HOOK, pulling loop current from the PBX. In response, the PBX “WINKS”, or reverses polarity
        to the C.O. for a brief period, telling the C.O. to send the last four digits of the incoming call. The
        C.O. responds by sending the last four digits dialed.
     l. Press OFF/ON HOOK on keypad to return reverse battery supervision (answer incoming call)
        NOTE- T/R RVRSD LED will glow, indicating above condition.
     m. Verify two-way voice conversation by connecting “butt-in” set across line
     n. Press DATA RESULTS to view digit signal power levels
                  DTMF signals are a combination of one high tone and one low tone. To be properly
                  detected and understood by the PBX, the tones must be no less than –22dBm with less
                  than 6dB of “twist”. Twist is just the difference in power levels between the two tones.
                  Verify the received tones are greater than –22dBm (between –6dBm and –22dBm) by
                  pressing NEXT to move the underscore indicator to each digit received.
     n. Press TIMING RESULTS to view digit timing and inter-digit delay
                  After receiving WINK from PBX, C.O. sends DTMF digits at specific intervals of on/off
                  sequencing. If too rapid, PBX cannot distinguish separation of digits. Tones should
                  nominally be 75mSecs on, 75mSecs off. NOTE- the first digit sent is not preceded by
                  off-timing, so may show 0 mSec for 1st digit INTERVAL. This is normal. If digit timing
                  or power results are outside normal parameters, consult Network Operations Center
                  (NOC) for adjustment of central office switch or FlexGrow equipment.
     o. Press ESC
     p. Press RCV FREQ LEVEL or XMIT FREQ LEVEL to swap tones, if desired.
     q. When tests are complete,
                  1. Press ESC
                  2. Press #7 on keypad to choose Exit Signaling Mode
                  3. Press #5 on keypad to exit signaling mode




9
     Figure 1.




10
                                              Appendix 1.

                          Verizon Material Codes - PSB 2486
                    CXR/Halcyon704A-4XX TIMS & Combination Sets
 MODEL                   BASIC    A     A1    B    C     G     H     H1    H2       H3      H4        N
    &           MATE     TIMS    SIG   CAL   1.5   T1   ADD   DDS   4W     2W      DTE     REM      ISDN
 OPTIONS         RIAL    UNIT            L   MHz        BAT         SW5   SW56     DCE     CONT
                CODE                    ID               T           6
  704A-410      560855    X                  X
  704A-430      560856    X      X           X
  704A-460      560857    X      X     X     X                            Consult the factory for
704A-PKG#1      560858    X      X           X           X    X     X      pricing and ordering      X
704A-PKG#2      560859    X      X           X           X    X     X          information.
704A-PKG#3      560860    X      X     X     X     X     X
 704A-NTS1      560861    X      X     X     X     X     X    X     X
 704A-NTS2      560862    X      X     X     X     X     X    X     X                               X




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