User manual

DEFINITY Enterprise Communications Server Release 6
Maintenance for R6vs/si
555-230-127
Issue 1
August 1997
Maintenance Object Repair Procedures
Page 10-1487UDS1-BD (UDS1 Interface Circuit Pack)
10
Misframe Alarm Inquiry Test (#145)
Misframe Alarm indicates that framing bits observed on a UDS1 Interface circuit
pack are in error. The Misframe Alarm Inquiry Test queries the total number of
misframes that have occurred on a DS1 Interface circuit pack since the last
inquiry.
When the DS1 Interface circuit pack detects a misframe error, it will increase its
misframe counter by 1. If the counter reaches a specified threshold (i.e.- 17), a
MISFRAME-COUNT message is automatically sent to the switch maintenance
software. After the maintenance software receives the MISFRAME-COUNT
message, the Misframe Alarm Inquiry Test is initiated to collect the misframe
counts from the UDS1 Interface circuit pack.
When the threshold of misframes is reached, if the UDS1 Interface circuit pack is
supplying the system synchronization source, then a switching synchronization
source message is sent to the TDM Bus Clock. See TDM-BUS (TDM Bus)
Maintenance documentation for details. A Minor alarm against the UDS1
Interface circuit pack is raised, but all trunks or ports of the UDS1 Interface circuit
pack remain in the in-service state.