Avaya Definity SI Maintenance Manual page 1003

ATM-SGRP (ATM Signaling Group)
f. Error Type 1793: failure of the Layer 2 Query Test for the primary signaling
channel.
g. Error Type 2305: the Remote Layer 3 Query Test (#637) failed. A specific
message was sent to the far-end switch, and it did not respond within the
allotted time.
1. Investigate elements of the ATM D-channel(s) (ATM-DCH) for both
If Test #637 fails twice in a row, the B-channels are alarmed and made
unavailable for outgoing calls (although incoming calls are still accepted).
When Test #637 succeeds and the Far-end switch starts responding
properly, the ATM Trunk (B-channels) are placed back into normal
operation and their alarms retired.
h. Error Type 3585: A SERV or SERV ACK ISDN D-channel message has
been received by a non-US-type interface (country option other than 1 on
the DS1 administration form). However, these messages are used only for
duplex NFAS signaling, which is supported by country protocol 1.
Thus, there may be a mismatch in administration between the local and
far-end switches.
1. Consult with the customer's network provider to determine whether
i. Error Type 3840-3928: These error types are used to report certain error
messages received by the ATM-SGRP Signaling Group for one of its
associated B-channels. The Aux Data field is the port number of the
B-channel from which the message was received.
555-233-123
Excessive AAL - The AAL layer is experiencing an excessive
number of errors in trying to reconstruct Service Data Unit (SDUs).
Possible causes:
— Something may be wrong with the ATM switch.
— The communication paths on the other side of the ATM
switch may be noisy.
— The sending node might not be healthy.
— Could be a problem with congestion on the ATM switch.
Excessive AAL - The AAL layer is experiencing an excessive
number of errors in trying to reconstruct Service Data Unit (SDUs).
Possible causes:
— Something may be wrong with the ATM switch.
— The communication paths on the other side of the ATM
switch may be noisy.
— The sending node might not be healthy. It could also be a
problem with congestion on the ATM switch.
this switch and the Far-end switch.
the D-channel is set up correctly on the far-end switch.
Issue 4 May 2002 10-217