Demand test descriptions and error codes - Avaya Support

Signaling Link Hardware Check (#636) in the test sequence. When the link does recover,
the B-Chels 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
this with status signaling-group grp#.
d. Error Type 513: the secondary signaling chel connection has been lost for more than 90
seconds. If the primary signaling chel is not in service, B-Chels will be placed in the ISDN
Maintenance/Far-End state. The B-Chels will not be usable for outgoing calls, although
incoming calls will still be accepted. The switch will automatically attempt to recover the
signaling link. Note the results of the Secondary Signaling Link Hardware Check (#639).
When the link does recover, the B-Chels 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 status signaling-group grp#).
e. Error Type 1793: The Layer 2 Query Test failed for the primary signaling chel. See Layer 2
Status Query Test (#647)
f. Error Type 2049: The Layer 2 Query Test failed for the secondary signaling chel. See Layer
2 Status Query Test (#647)
g. Error Type 2305: The Remote Layer 3 Query (#637) failed. A specific message was sent to
the far-end switch, and it did not respond within the time allowed. Investigate elements of
the ISDN PRI D-Chel(s) ISDN-PLK (ISDN-PRI Signaling Link Port) for both this switch and
the far-end switch. If Test #637 fails twice in a row, the B-Chels 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-Chels) will be placed back into normal operation, and their alarms will be retired.
h. Error Type 3585: A SERV or SERV ACK ISDN D-chel message has been received by a
non-US-type interface (country option other than 1 on the DS1 Administration screen).
However, these messages are used only for NFAS D-chel backup signaling that 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-Chel is set up
correctly at the far-end switch.
i. Error Types 3842 - 3942: These Error Types report certain error messages received by the
ISDN-PRI Signaling Group for one of its associated B-Chels. The aux data field shows for
which B-Chel (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 recommended action 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.
Table 157 provides more information.
552 Maintenance Alarms for Communication Manager, Media Gateways and Servers