Nortel Communication Server 1000 Fundamentals page 111

failure to a field-replaceable component such as the near-end
MCR, the distant-end MCR, or the network equipment.
Table 23 "MMI T1 tests" (page 111)
equipment it tests:
Table 23
MMI T1 tests
Test Number
1
2
3
4
5
The following sections explain how to initiate these tests in MMI and each
test's function.
A verbose mode is also available for the user. This mode provides a
display of in-progress test results and allows the user to see exactly which
port, or ports are not passing the test. The command to activate the
verbose mode is TEST VERBOSE (T V).
On-line Carrier test
Test 1, the On-line Carrier test, allows a T1 link to be tested without
effecting call activity. Test patterns are passed through the T1 link, looped
back at the distant end and checked at the near end. A failure is detected
if the MCR does not receive the data word within 100 ms. In this case, a
failure peg counter increases by 1. This counter's maximum capacity is
65,000. At the end of the test, the test results message will indicate how
many failures occurred during the test. If this test fails, it indicates problem
in the MCRs, T1 link, or the network. To isolate the failure to a specific
piece of equipment, further tests will have to be run. The following figure
demonstrates how the signaling is looped back.
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Equipment Tested
The Entire MCR System on
unused T1 channels.
Near-end MCR
The Entire MCR System on
the selected T1 carrier.
Near-end MCR, T1 Link,
and T1 equipment up to the
Network loopback.
Near-end MCR, T1 Link,
and T1 equipment up to the
Network loopback.
Nortel Communication Server 1000
Mini-Carrier Remote Fundamentals
NN43001-557 04.01 4 June 2010
MMI diagnostic tools 111
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associates each MCR test with the
Test Description
Non-disrupting line test
Local Loopback
Remote Loopback
Network has loopback
Loop back towards network