DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Maintenance Object Repair Procedures
9-945ISDN-SGR (ISDN-PRI Signaling Group)
9
#639 (Secondary Signaling Link Hard ware Check) in the test sequence.
When the link does recover, the B-channels wi ll be negotiated b ack to the
In-Service state and their alarms will b e 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 messag e was sent to the far-end switch, and it did not respond
within the allotted time. Investigate eleme nts of the ISDN PRI D-channel(s)
(ISDN-LNK) for both this switch and the Far-end switc h. If Test #637 fails
twice in a row, the B-channels will be alarme d and made unavailab le for
outgoing calls (althou gh incoming cal ls will still be accep ted). When Test
#637 succeeds and the Far-end switch starts respond ing properly, the
DS1 ISDN Trunk (B-channels) will be p laced back into normal operation
and their alarms will be retired .
g. A SERV or SERV ACK ISDN D-channel message has been received by a
non-US-type interface (country o ption other than 1 on the DS1
administration form). However, these messag es 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 c ustomer’s network provider to
determine whether the D-channel is set up correctly on the far-end switc h.
h. These Error Types are used to report c ertain error messages received b y
the ISDN-PRI Signaling Group for one of its associated B-c hannels. The
aux data field shows for which B- channel (port number) the messag e was
received .
The error code generated eq uals 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 p laced in the
log when they are received, b ut no direct action or alarmi ng is performed
solely in response to receiving them. They provide added data that may
prove useful when tracking d own obscure networking and routing
problems. The following table p rovides more information: