Server Alarms - Avaya Support

Communication Manager Maintenance Object Repair Procedures
Table 325: Descriptions and Recommendations for Error Types 3842-3942 8 of 9
Error
Code
3942
(cont’d)
Description/Recommendation
3. To interpret the receipt of Cause Value 102 from the far-end, look at a trace/
protocol capture of the messaging taking place, and find the last message
received from the far-end before Cause Value 102 is received. The timer that
expired is most likely the Layer 3 timer associated with that last message. If
Communication Manager generated a message in between those two events
that should have stopped the timer, the cause might be:
a. The far-end never saw the message because the message was corrupted
in transmission by noise on the D-Channel. Check for any type of T1/E1
facility errors.
b. The far-end is experiencing a high traffic condition and did not have the
processing time to parse the sent message before the timer expired.
c. Even though the message was seen to be generated in an internal
Communication Manager trace, the message was never transmitted out
onto the D-Channel. Perform an external protocol capture on the
D-Channel to confirm the transmission of the suspect message.
4. If Communication Manager did not respond to the receipt of the last
message from the far-end, then Communication Manager internal hardware
and software become suspect, and troubleshooting the problem must
proceed from that point.
5. Communication Manager administration that can contribute to seeing timer
expiry errors:
a. Trunk group form: Incoming call handling table. If the Per call CPN/BN
field is incorrectly populated in comparison to how the CO is programmed
to send CPN or BN, it causes Communication Manager to send a
FACILITY message to the CO requesting CPN/BN information and the CO
will never respond. Communication Manager will log many timer expiry
errors against the signaling group (Error Type 1, Aux Data 13).
b. DS1 form: Protocol version: If Communication Manager is running custom
protocol (protocol version A) and is connected to a Nortel DMS central
office running custom protocol, Communication Manager will log timer
expiry errors against the signaling group for DISCONNECT problems
(Error Type 1, Aux Data 4) during high traffic conditions.
1200 Maintenance Alarms for Avaya Communication Manager, Media Gateways and Servers
8 of 9