ATM-SGRP (ATM Signaling Group)
Issue 4 May 2002
10-217
555-233-123
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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.
f. Error Type 1793: failure of the Layer 2 Query Test for the primary signaling
channel.
■
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.
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
this switch and the Far-end switch.
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
the D-channel is set up correctly on the far-end switch.
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.
Summary of Contents for Definity SI
Page 1: ...0DLQWHQDQFH IRU YD D 1 7 6HUYHU 6 Volumes 1 2 and 3 555 233 123 Issue 4 May 2002...
Page 62: ...Maintenance Architecture 555 233 123 1 26 Issue 4 May 2002...
Page 92: ...Management Terminals 555 233 123 3 26 Issue 4 May 2002...
Page 204: ...Routine Maintenance Procedures 555 233 123 5 100 Issue 4 May 2002...
Page 250: ...LED Interpretation 555 233 123 7 10 Issue 4 May 2002...
Page 2804: ...Maintenance Object Repair Procedures 555 233 123 10 2018 Issue 4 May 2002...