Maintenance-Object Repair Procedures
555-233-143
8-974 Issue 1 May 2002
Signaling Port LAN Loop-Back Test (#939)
This test is destructive.
This test verifies the connectivity of an ISDN-PRI signaling port (D channel)
across the packet bus, also known as the LAN bus. It will execute only if the port
is out of service. Failure of this test indicates a fault associated with the port
hardware on the circuit pack.
Figure 8-52. Signaling Port LAN (Packet Bus) Loop back
Packet Bus
Packet
Interface
TN1655
UDS1
TN464
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