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SYNC (Port-Network Synchronization)
Issue 1 June 2005 2149
Table 769 lists circuit packs that can report slips and related circuit packs whose hardware
problems that cause those slips.
Troubleshooting Synchronization Problems
The following flow chart presents a logical approach to troubleshooting synchronization
problems in conjunction with the previous background information. Explanatory notes follow the
charts.
Table 769: 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