Nortel Communication Server 1000 Series Manual page 123

Table 28
MMI commands (cont'd.)
Command
T SL
T SL D
@@@
Background diagnostics
The Fiber Remote Multi-IPE Interface MPU continuously monitors
the Fiber Remote Multi-IPE Interface functions, the fiber-optic link
performance, and the superloop status.
If the Fiber Remote Multi-IPE Interface MPU detects loss of clock, loss
of frame, loss of signal, or excessive bit error rate, the following alarm
conditions are exhibited:
•
•
•
•
Off-line and on-line diagnostics
Off-line diagnostic tests are potentially traffic affecting if they are performed
on an active superloop that has to be disabled or an active superloop
is tested by mistake. Normally the tests are performed on disabled
superloops. Therefore, before you can test a superloop, you must disable
that superloop using overlay program LD 32. These tests are more
extensive than background tests, even though they also test for loss of
clock, loss of frame, loss of signal, and excessive bit error rate on the
fiber-optic link.
Copyright © 2007-2009 Nortel Networks
.
Description
Test near-end superloop. Initiates a series of
pre-programmed tests on the near-end superloops.
Test duration can be set from 1 to 98 minutes. By
entering 0, the tests run one time. To stop testing enter
STOP.
Test far-end superloop. Initiates a series of
pre-programmed tests on the far-end superloops. Test
duration can be set from 1 to 98 minutes. By entering
0, the tests run one time. To stop testing enter STOP.
Terminates the Host SDI mode and returns the
terminal to the MMI mode.
The normally open alarm contacts are closed at both ends of the link.
The red alarm LED is lit at the near-end of the fault and a yellow alarm
LED is simultaneously lit at the far-end of the fiber-optic link.
The MMI maintenance terminal displays the error report and the
printer, if equipped, prints the error report.
The alarm log file is updated with the latest error condition.
The system monitor reporting is interrupted for one second.
Nortel Communication Server 1000
Fiber Remote Multi-IPE Interface Fundamentals
NN43021-556 03.01
11 May 2009
Diagnostic tools 123