Avaya S8700 Maintenance Manual page 1706

For multi-connect configurations

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Maintenance-Object Repair Procedures

Remote Layer 3 Query (#637)

This test will query the far-end switch or terminal adapter to determine whether

the signaling connection is functioning properly at Layer 3. It will select a

B channel in the in-service or maintenance service state and send an ISDN

layer-3 SERVice message, which requires a response from the far end (similar to

performing Test #256 on an ISDN trunk. The test will not be performed if there are

no B channels in an appropriate ISDN service state (as when none are

administered or they are all out of service).

The service state can be displayed by using the status trunk

trunk-group/trunk-member or status pri-endpoint command.

As is the case with Test #256 for an ISDN trunk, a PASS only indicates that a

message was composed and sent to the far-end switch or terminal adapter. The

ISDN PRI Specification allows up to 2 minutes for a response. Check the Error

''ISDN-SGR (ISDN-PRI Signaling Group)''

evidence of a Remote Layer 3 Query failure.

Tests #639 and #636 check the health of the D channels and DS1/UDS1 Interface

circuit packs. As shown in

the communication path from the processor from the processor, through the

TDM/packet bus and DS1/UDS1 Interface circuit pack, and on to the far-end

switch or terminal adapter. A special ISDN message is sent to the far-end switch

or terminal adapter, which must respond within a specified amount of time. This

test is designed to ensure that the communication path between the switch and

the far end is up and operational, and that the two endpoints can properly

exchange ISDN control messages.

Figure 8-53. Remote Layer 3 Query Test (#637)

UDS1 board resides in an PN, there is additional Port Network Connectivity

hardware connecting the packet buses of the IPSI PN and PN. Examples of such

hardware are the Center Stage Switch and fiber-optic cables.

Issue 1 May 2002

8-53, this test goes one step further by checking

illustrates a UDS1 Interface circuit pack located in the PN. When the

errors of type 2305 for

Troubleshooting