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Maintenance Object Repair Procedures
555-233-123 10-1866 Issue 4 May 2002
FAIL UDS1 Interface circuit pack detects a Loss of Signal alarm. The
physical link is broken or the remote DS1 endpoint is down. All
trunks or ports of this UDS1 interface circuit pack are
out-of-service. If the UDS1 Interface circuit pack is designated as
the supplier of the system synchronization source, then the
system synchronization maintenance will adopt a source
elsewhere. Refer to the
‘‘SYNC (Synchronization)’’
section in
this chapter for details. If the UDS1 connects to a T1 network
facility:
1. Check the physical connection of the UDS1 Interface circuit
pack and the cable. If a CSU Module or a Sync Splitter is
physically connected to a UDS1-BD board on the back of the
port carrier, check the physical connection of the CSU
Module/Sync Splitter and make sure the Network Interface
cable is plugged into the CSU Module’s/Sync Splitter’s
NETWORK jack.
2. If the UDS1 Interface circuit pack connects to a T1 facility, call
the vendor of the T1 carrier to diagnose the remote DS1
endpoint. If the UDS1 Interface circuit pack connects directly
to a switch, call the system technician of the remote switch to
diagnose the DS1 endpoint.
If the UDS1 connects to a line-side terminating device such as a
PRI terminal adapter:
1. Check the physical connection of the UDS1 Interface circuit
pack to the terminating device. Check premise distribution
system (or intra-premise wiring) for physical connection
failures. If a CSU Module or Sync Splitter is physically
connected to a UDS1-BD board on the back of the port
carrier, check the physical connection of the CSU
Module/Sync Splitter and make sure the Network Interface
cable is plugged into the CSU Module’s/Sync Splitter’s
NETWORK jack.
2. Contact the vendor of the line-side terminating device to
diagnose the equipment.
Table 10-673. TEST #138 Loss of Signal Alarm Inquiry Test — Continued
Error
Code Test
Result Description/Recommendation
Continued on next page