Avaya S8700 Maintenance Manual page 1396

Maintenance-Object Repair Procedures
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
2. Verify that the DS1 facility and the network are using the same Line
3. For TN574 boards and TN1654 boards in T1 mode, check line
4. Enter display errors and follow the associated repair procedures
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
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
2. If the CSUs are not in loop-back mode, reset both DS1 CONV
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.
8-674 Issue 1 May 2002
for any SYNC, TDM-CLK, or SNC-BD errors.
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,
Mode'' for details on how these options apply to the TN574 and
TN1654 DS1 CONV boards.
equalization settings as described in the above section
CONV-1 and DS1 CONV-2 Line
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.
the other end of the DS1 CONV complex.
Figure 8-25 on page 8-675
Also check to see if the CSUs have been manually hard-wired into a
loop-back mode. Remove detected loop backs.
boards via the reset board command.
"''Line Coding''
Compensation''.
to see if a CSU is in a loop-back mode.
and ''Framing
''DS1
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