14-4 Diagnostics
Model No.
Running Head

.System with Cross-Connect Option System Testing and Diagnostics

14.4 .System with Cross-Connect Option

14.4.1 Circuit Diagnostics

In systems equipped with Cross-Connect CPUs, the cross-connect element adds another level
of testing within the node and enhances the system’s diagnostic capabilities. The ope rator may
also monitor and set the state of the Transmit and Receive ABCD signaling bits of a digitized
voice circuit that is cross-connected between WANs. The table below shows detailed
information on the diagnostic capabilities of the circuits.
Voice
without
Signaling
Voice with
Signaling
Single Data
DS0
(64 Kbps)
Super-rate
Data
(N x 64 Kbps)
Loopbacks
Local loopbacks
Toward WAN1 Yes Yes Yes Yes
Toward WAN2 Yes Yes Yes Yes
Bit Error Rate Tester (BERT)
Patterns Supported
All 1s Yes Yes Yes Yes
All 0s Yes Yes Yes Yes
1:1 Yes Yes Yes Yes
1:7 Yes Yes Yes Yes
M_OOS Yes Yes Yes Yes
BERT Direction
Toward WAN1 Yes Yes Yes Yes
Toward WAN2 Yes Yes Yes Yes
Tones Supported
300 Hz Yes Yes Yes Yes
1 kHz Yes Yes Yes Yes
3 kHz Yes Yes Yes Yes
Tone Direction
Toward WAN1 Yes Yes Yes Yes
Toward WAN2 Yes Yes Yes Yes