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Isolating and Repairing Packet-Bus Faults
Issue 1 May 2002
4-91
555-233-143
The analog trunk testing functions are discussed in the following sections in
Chapter 8, ‘‘Maintenance-Object Repair Procedures’’
■
‘‘TIE-TRK (Analog Tie Trunk)’’ on page 8-1638
■
‘‘DID-TRK (Direct Inward Dial Trunk)’’ on page 8-515
■
‘‘AUX-TRK (Auxiliary Trunk)’’ on page 8-310
NOTE:
Every Maintenance/Test circuit pack must be of TN771D vintage or later.
TN771D Packet Functions
The Maintenance/Test packet-bus port (M/T-PKT) provides the packet-bus testing
and reconfiguration capabilities. When the port is in service, it continuously
monitors the packet bus for faults and fault recoveries, and reports results to
PKT-BUS maintenance.
The amber LED on the TN771D Maintenance/Test circuit pack provides a visual
indication of the state of the packet bus:
NOTE:
It takes 5 to 10 seconds for the LED to respond to a change in the state of
the packet bus.
During normal switch operation, the Maintenance/Test circuit pack provides visual
feedback of the packet-bus state. When in stand-alone mode (see next section),
these visual indications are still present, but the packet bus is never reconfigured.
The amber LED either blinks, or is off.
Flashing
Flashing of the amber LED once per second indicates that there are too
many faults for the Maintenance/Test packet-bus port to recover by
swapping leads. The packet bus may be unusable. If the failures
detected are open lead failures, the packet bus may still be operating.
On steady
The Maintenance/Test packet-bus port has swapped leads on the packet
bus to correct a fault. The packet bus is still operating. Or, one of the
other ports on the Maintenance/Test circuit pack is in use.
NOTE:
First busy out the Maintenance/Test circuit pack’s ports not
used for packet-bus testing before using this circuit pack to
help resolve packet-bus faults. This is done by entering
busyout port UUCSS01, busyout portUUCSSl02, and
busyout port UUCSS03. Be sure to release these ports
when the process is completed.
Off
There is no packet-bus fault present.
Содержание S8700 Series
Страница 50: ...Maintenance Architecture 555 233 143 1 26 Issue 1 May 2002 ...
Страница 74: ...Initialization and Recovery 555 233 143 3 12 Issue 1 May 2002 ...
Страница 186: ...Alarms Errors and Troubleshooting 555 233 143 4 112 Issue 1 May 2002 ...
Страница 232: ...Additional Maintenance Procedures 555 233 143 5 46 Issue 1 May 2002 ...
Страница 635: ...status psa Issue 1 May 2002 7 379 555 233 143 status psa See status tti on page 7 406 ...
Страница 722: ...Maintenance Commands 555 233 143 7 466 Issue 1 May 2002 ...
Страница 1121: ...CARR POW Carrier Power Supply Issue 1 May 2002 8 399 555 233 143 Figure 8 19 Power Distribution Unit J58890CH 1 ...
Страница 1447: ...E DIG RES TN800 reserve slot Issue 1 May 2002 8 725 555 233 143 E DIG RES TN800 reserve slot See ASAI RES ...
Страница 1735: ...LGATE AJ Issue 1 May 2002 8 1013 555 233 143 LGATE AJ See BRI SET LGATE BD See BRI BD LGATE PT See BRI PT ...
Страница 1846: ...Maintenance Object Repair Procedures 555 233 143 8 1124 Issue 1 May 2002 Figure 8 62 TN787 MMI MULTIMEDIA INTERFACE CIRCUIT PACK ...