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Denial Events
172 Maintenance Procedures for Avaya Communication Manager 3.0, Media Gateways and Servers
● Call state problems are reported with STATUS messages. The equipment sending the
Cause Value uses the CALL STATE IE of the STATUS message to indicate the call state.
To determine the call state of the other end of the interface, run the message sequence of
the call through the SDL flow charts of the appropriate side (user or network) and the
appropriate protocol (TR41449/41459, TR1268, A211 etc.). If the call state at the other end
of the interface does not agree with that reported in the STATUS message and both sides
are already running the same protocol, then a problem with the implementation of the state
machine exists on either side.
Problems have been revealed with the state machine implementations of some of the CO
switches for different protocols, and the state machine problems in the CO switches are
most likely not going to be corrected. Communication Manager has not shown any
problems with its state machine implementations for the different protocols.
Change Communication Manager administration to change the message sequence of the
call scenario causing the error, and help solve state machine implementation problems. For
example:
- change the inter-working message on the DS1 form from PROGRESS to ALERTING
- change the “wait” steps in vectors to be “i-silent” so that they do not generate extra
PROGRESS messages in the calling message sequence.
Cause Value 102
[0x66/0xE6] -
Recovery on timer Expiry
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.
This Cause Value has local significance only. 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
Communication Manager logs timer expiry errors that it generates to the hardware error log
against the signaling group of the D-channel where the error occurred. The signaling group
(ISDN-SER) error is Error Type 1 and the Aux Data contains the identifier of the Layer 3 timer
that expired.
Communication Manager does not generate the diagnostic information for the Cause Value IE.