Maintenance
Page 117 of 150
Mini-Carrier Remote
Description, Installation, and Maintenance
Figure 60
Off-line Near end loopback test
This test can also be issued with a distant modifier. Entering T D will cause
your MCR card to command the far MCR to run its Off-line Near End
Loopback test. Note: This command is limited to 10 minutes because you will
be unable to stop the far MCR from running the command.
Off-line Distant-End Loopback test
Test 3, the Off-line Distant End Loopback test loops the distant end signal
back towards the near end. You can perform the Off-line Distant End
Loopback test on the distant end MCR. A failure is detected if the MCR does
not receive the data word that was sent. If a failure occurs failure peg counter
is incremented. This counter will saturate at 65,000 counts. At the end of the
test, the test results message will indicate how many failures occurred during
the test. A failure on test #3, indicates a far end defective MCR Circuit Card
or a bad T1 link.
Figure 61
Off-line distant end loopback test
N e a r M C R C a r d
F a r M C R C a r d
E x t e r n a l N e t w o r k
T1 Traffic
T1 Traffic
L o o p b a c k e d T e s t V e c t o r
N e a r M C R C a r d
F a r M C R C a r d
E x t e r n a l N e t w o r k
T1 Traffic
T1 Traffic
L o o p b a c k e d T e s t V e c t o r
