Demand test descriptions and error codes - Avaya Support

SIP-SGRP (SIP Signaling Group)
Table 230: Descriptions and Recommendations for Error Types 3842-3942 8 of 10
Error
Code
Description/Recommendation
3942 Cause Value 102. Recovery on timer expiry. No answer to CALL PROCEEDING.
The equipment sending this Cause Value sent or received a Layer 3 Q.931
message. Sending or receiving this message has initiated a Layer 3 timer that has
expired. This Cause Value is being generated in conjunction with Q.931 protocol
error handling procedures. The ISDN network between the user and the
equipment generating the Cause Value might:
● Send no cause indication through the network.
● Send a more generic Cause Value through the network.
The repair steps are based on recommendations from Tier 4 ISDN experience:
1. Check the diagnostic information for the timer number that has expired.
2. Check that the protocols at each end of the interface match (for example,
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:
a. The far-end never saw the message because the message was
corrupted in transmission by noise on the D-Chel. 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-Chel. Perform an external protocol
capture on the D-Chel to confirm the transmission of the suspect
message.
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Issue 5 May 2009 839