Nortel Networks 311 User Manual
Man-Machine T1 maintenance interface software
255
Figure 46
MMI Local loopback test
MMI Local loopback test
Figure 47
MMI External loopback test
MMI External loopback test
Test 3, network loopback, loops the received T1 data back toward the CPE
equipment. No test data is generated or received by the Lineside T1 card. If
test 2 passes but test 3 fails, it indicates that the CPE device is defective. If
test 2 was not run and test 3 fails, the T1 link or the CPE device could be
defective. To isolate the failure to the CPE device, tests 2 and 3 must be run
in tandem.
equipment. No test data is generated or received by the Lineside T1 card. If
test 2 passes but test 3 fails, it indicates that the CPE device is defective. If
test 2 was not run and test 3 fails, the T1 link or the CPE device could be
defective. To isolate the failure to the CPE device, tests 2 and 3 must be run
in tandem.
demonstrates
how the signaling is looped back toward the CPE equipment.
Figure 48
MMI Network loopback test
MMI Network loopback test
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311
01.04
Standard
Release 5.0
23 May 2008
Copyright © 2003-2008, Nortel Networks
.