Avaya G700 Maintenance Manual page 168

6 Avaya MultiVantage Software-Controlled Maintenance:
When this error occurs, the state of the Signaling Group is changed to out-of-service (verify using
the status sig-group command).
• (c) This error indicates that the secondary signaling channel connection has been lost for more than
90 seconds. If the primary signaling channel is not in-service, B-channels will be placed in the
ISDN Maintenance/Far-End state. The B-channels will not be usable for outgoing calls, although
incoming calls will still be accepted. The switch will automatically attempt to recover the signaling
link. Pay particular attention to the results of Test #639 (Secondary Signaling Link Hardware
Check) in the test sequence. When the link does recover, the B-channels will be negotiated back to
the In-Service state and their alarms will be retired.
When this error occurs, the state of the Signaling Group is changed to out-of-service (verify using
the status sig-group command).
• (d) This error indicates a failure of the Layer 2 Query Test for the primary signaling channel
• (e) This error indicates a failure of the Layer 2 Query Test for the secondary signaling channel.
• (f) This error indicates a failure of Test #637, the Remote Layer 3 Query. A specific message was
sent to the far-end switch, and it did not respond within the allotted time. Investigate elements of
the ISDN PRI D-channel(s) (ISDN-LNK) for both this switch and the Far-end switch. If Test #637
fails twice in a row, the B-channels will be alarmed and made unavailable for outgoing calls
(although incoming calls will still be accepted). When Test #637 succeeds and the Far-end switch
starts responding properly, the DS1 ISDN Trunk (B-channels) will be placed back into normal
operation and their alarms will be retired.
• (g) A SERV or SERV ACK I SDN 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 only by country protocol 1.
Thus, there may be a mismatch in administration between the local and far-end switches. Consult
with the customer's network provider to determine whether the D-channel is set up correctly on
the far-end switch.
• (h) These Error Types are used to report certain error messages received by the ISDN-PRI
Signaling Group for one of its associated B-channels. The aux data field shows for which B-
channel (port number) the message was received.
The error code generated equals 3840+x, where x is a Cause Value defined by the ISDN PRI
Specification. Note that there is no Test to Clear Value for these Error Types; selected ISDN cause
values are placed in the log when they are received, but no direct action or alarming is performed
solely in response to receiving them. They provide added data that may prove useful when
tracking down obscure networking and routing problems. The following table provides more
information:
168
ISDN-SGR (ISDN-PRI Signaling Group)
Maintenance for S8300/S8700 and G700
555-234-101 — Issue 2 — October 2002