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Event Data
Issue 1 June 2005 173
Troubleshooting
● Check the diagnostic information for the timer number that has expired. See Cause Values
and their meanings/interpretations on page 128.
● Check that the protocols at each end of the interface match (for example, both sides are
AT&T Custom or both sides are NI-2).
- If the ends of the interface are running different protocols, they might be running with
different values for their Layer 3 timers.
- If the protocols at each end of the interface match, the Communication Manager timer
might have expired because:
Table 47: Cause Value 102, Signaling Group Error Type 1, Aux Data information
Aux
Data
Value
Timer
Name
Timer
Value
Description
1 T302 4s SETUP_ACK messages (overlap receiving mode)
2 T303_1 4s SETUP message 1st timer expiration
3 T303_2 4s SETUP message 2nd timer expiration
4 T305 4/30s DISCONNECT message
5 T308_1 4s RELEASE message 1st expiration
6 T308_2 4s RELEASE message 2nd expiration
7 T310 10s CALL_PROCEEDING message
8 T313 4s CONNECT message
9 T313_2 4s “no longer used”
10 T316 120s RESTART message
11 TL3 30s Layer 3 timer expired (d-channel dropped)
12 T309 90s d-channel reestablishment expiration stable calls are
dropped
13 T_WRN h FACILITY message (waiting for ACK or REJ)
14 T321 120s SERVICE message (waiting for ACK)
15 TSM h retransmission of SERVICE on d-channel switchover
16 TM100 h ISDN-BRI maintenance (MIM timer)