Nortel Networks Circuit Card 311 User Manual
Page 293
Man-Machine E1 maintenance interface software
293
terminal for the MMI. The following sections describe the options available
through the LEI’s MMI terminal and explain how to set-up, configure, and
use the MMI.
The MMI provides the following maintenance features:
•
configurable alarm parameters
•
E1-link problem indicator
•
current and historical E1-link performance reports
•
E1 verification and fault isolation testing
•
configuration of A\B bits (North American Standard, Australian P2, or
customized settings are available)
Alarms
The MMI may be used to activate alarms for the following E1-link conditions:
•
excessive bit-error rate,
•
frame-slip errors,
•
out-of-frame,
•
loss-of-signal, and
•
blue alarm.
Pre-set thresholds and error durations trip LEI alarm notifications. For
descriptions of each of these E1-link alarm conditions, see
counters and reporting" (page 309)
. For instructions on how to set alarm
parameters, see
. For information on accessing
alarm reporting, see
,
"Display Performance" (page 310)
.
Two levels of alarm severity exist for bit errors. Different threshold and
duration settings must be established for each level.
When the first level of severity is reached (alarm level 1), the MMI causes
the following:
•
the external alarm hardware activates
•
the RED ALARM LED on the faceplate is lit
•
an alarm message is displayed on the MMI terminal
•
an entry is created in the alarm log and printed to the MMI port
When the second level of severity is reached (alarm level 2), the MMI
performs all functions at alarm level 1. In addition, the LEI enters
line-conditioning mode. In this mode, the LEI sends either "on-hook" or
"off-hook" signals for all 30 ports to the CS 1000E, CS 1000M, and Meridian
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311
01.04
Standard
Release 5.0
23 May 2008
Copyright © 2003-2008, Nortel Networks
.