Maintenance
Page 115 of 150
Mini-Carrier Remote
Description, Installation, and Maintenance
failures, if any, occurred during the test. If the counter reaches 65,000,
it will remain there until reset.
Test 1 listed above is a test that can be run while the MCR Circuit Pack
is on line. The On-line Carrier test will indicate whether or not there is
a failure, but does not indicate where the failure has occurred.
Tests 2 through 4 are off-line diagnostic tests and must be run when
the MCR Circuit Pack on which the tests are being run has been
disabled, since the testing will interfere with call traffic. By using the
off-line tests in tandem you will be able to isolate a failure to a
field-replaceable component such as the near-end MCR, the
distant-end MCR, or the network equipment.
Table 19 associates each MCR test with the equipment it tests:
The following sections explain how to initiate these tests in MMI and each
test’s function.
Table 19
MMI T1 tests
Test Number
Equipment Tested
Test Description
1
The Entire MCR System on
unused T1 channels.
Non-disrupting line test
2
Near end MCR
Local Loopback
3
The Entire MCR System on the
selected T1 carrier.
Remote Loopback
4
Near end MCR, T1 Link, and
T1 equipment up to the
Network loopback.
Network has loopback
5
Near end MCR, T1 Link, and
T1 equipment up to the
Network loopback.
Loop back towards network
