Demand test descriptions and error codes - Avaya Support

In situations where one or many circuit packs in the system are experiencing slips, the problem
could be with the synchronization reference, with individual circuit packs, or with phase
modulation of the transmitted digital bit streams due to environmental variations of the
transmission facilities (such as temperature variations that affect the electrical length of a
transmission line). The circuit packs that can experience slips and the associated error log entry
for slips are as follows in Table 244:
Table 244: Error Log Entries for Slip Errors
Circuit Pack Error Log
Name
DS1 Interface DS1-BD 3073 – 3160
Expansion Interface EXP-INTF 2305
Switch Node Interface SNI-BD 1537
circuit pack TDM-CLK 1025
UDS1 Interface UDS1-BD 3073 – 3160
Error Log Number of Slips
When slips occur on any of these circuit packs, first consult the individual circuit pack’s section
in this manual. If slips occur in small amounts, they may be due to environmental conditions as
previously described. If no service degradation is occurring, no action is necessary. When the
system switches synchronization sources, slips can be expected from DS1-BD, UDS1-BD, and
EXP-INTF circuit packs. If service degradation occurs, after following the repair steps in the
individual section, use the following trouble shooting techniques.
Table 245 lists circuit packs that can report slips and related circuit packs whose hardware
problems that cause those slips.
Table 245: Slips and Related Circuit Packs
Circuit Pack Reporting Slips Associated Circuit Packs that Can Cause Slips
DS1 Interface Active Tone-Clock in same PN
Expansion Interface Active Tone-Clock in same PN or circuit pack at
opposite end of fiber or metallic connection
Switch Node Interface Circuit pack at opposite end of fiber or metallic
connection, or active Switch Node Clock circuit pack in
same switch node carrier
IPSI’s Tone-Clock or Tone-Clock
circuit pack
Current DS1 reference
UDS1 Interface Active Tone-Clock in same PN
898 Maintenance Alarms for Communication Manager, Media Gateways and Servers