Nortel Meridian 1 Option 11C Manual page 108

Page 108 of 126
Link diagnostic and remote loop back tests
553-3011-315 Standard 13.00
PRI Maintenance
3 If any of the 30 channels are busy at midnight, the software disables one
idle channel, chosen at random, and checks it while the card is enabled.
With the ATLP command set to zero, only one channel is tested. The
channel tested is randomly selected by software; it cannot be specified.
To perform the automatic loop test as part of midnight routines, use
LD 60
ATLP 1 or 0
The remote loop-back and the link diagnostic test are performed manually on
a per channel or per-loop (or card) basis.
Link diagnostic test
The link diagnostic test, also called the far end loop-back test, does not test
the Meridian 1 2.0 Mb PRI. It puts the 2.0 Mb PRI in loop-back mode so a
remote loop-back test can be performed on equipment at the far end. Refer to
Figure 12.
The 2.0 Mb PRI channel or loop (card) tested must be disabled.
Figure 12
2.0 Mb PRI Link Diagnostic (Far End Loopback) Test
NEAR END
Option 11C
RMST L - test run from PRI2 end
January 2002
NTAK79
or
NTAK50
FAR END
Far End Switch
RLBK L - this end in loopback
553-A0146