Maintenance-Object Repair Procedures
555-233-143
8-674
Issue 1 May 2002
j. More than 17 misframe errors occurred. This error will clear when there
are no misframes for 1 hour.
1. Enter display errors and follow the associated repair procedures
for any SYNC, TDM-CLK, or SNC-BD errors.
2. Verify that the DS1 facility and the network are using the same Line
Coding. For TN574 boards and TN1654 boards in T1 mode, also
verify that the Framing Mode used is the same. Use list fibers and
display fiber-link commands to check the values for this DS1
facility. Contact T1 Network Service to check the modes used by
the network. See the above sections, “
and
for details on how these options apply to the TN574 and
TN1654 DS1 CONV boards.
3. For TN574 boards and TN1654 boards in T1 mode, check line
equalization settings as described in the above section
CONV-1 and DS1 CONV-2 Line Compensation’’
4. Enter display errors and follow the associated repair procedures
for any EXP-INTF, and SNI-BD errors for the Fiber Endpoints. Enter
display errors and follow the associated repair procedures for any
FIBER-LK errors for this fiber link.
5. If the problem still persists, replace this DS1 CONV circuit pack.
6. If the problem still persists, replace the DS1 CONV circuit pack at
the other end of the DS1 CONV complex.
k. Facility Packet Channel Loopback Error. This error indicates that the DS1
CONV primary facility that carries the packet time slots and DS1 control
channel is looped to itself. This error applies only to facilities A and B on
TN1654 DS1 CONV boards. If both facilities A and B are being used and
firmware detects a loop-back condition an attempt will be made to switch
the primary facility to the other facility. If the other facility is looped, down
or not being used, the PN will be down until this loop back is removed.
1. Check the loop-back LEDs on both CSU A and CSU B as shown in
to see if a CSU is in a loop-back mode.
Also check to see if the CSUs have been manually hard-wired into a
loop-back mode. Remove detected loop backs.
2. If the CSUs are not in loop-back mode, reset both DS1 CONV
boards via the reset board command.
l. Facility Jitter Alarm. This alarm indicates excessive receive jitter on the
DS1 facility. This error only applies to TN1654 DS1 CONV boards. The
problem is external to the DS1 CONV board. It could be caused by bad
wiring, a bad device (CSU or repeater) or a bad signal coming in at the
Network Interface.
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 ...