Nortel Networks 1000 - Manual (Page 299)

Man-Machine E1 maintenance interface software 299
Intercall (release guard) Time – This is the number of milliseconds that
the LEI maintains the idle signal to the CPE before initiating a new call.
The CPE should not initiate a new call during this time. If it does so, the
off-hook indication is ignored until the release guard time has expired. This
value defaults to 0 which relies on the M-1 to observe the proper guard
time. If a non-zero value is entered, off-hook from the CPE and Ringer-On
commands from the M1/SL100 is ignored until this timer has expired.
Display Configuration (D C)
The Display Configuration (D C) command displays the various
configuration settings established for the LEI. Entering this command
causes a screen similar to
Figure 70 "Display Configuration (D C) screen"
(page 299) to appear.
Figure 70
Display Configuration (D C) screen
Alarm operation and reporting
The MMI monitors the E1 link according to parameters established through
the Set Alarm command for the following conditions:
• Excessive bit error rate
•
Frame slip errors
• Out of frame condition
• Loss of signal condition
• Blue alarm (AIS) condition
Descriptions of the excessive bit error rate and frame slip errors conditions
are found in
“Configuring parameters” (page 289) . Bit errors activate
either a level 1 or level 2 alarm. The remaining conditions, when detected,
always cause the system to activate a level 2 alarm.
An out-of-frame condition is declared if 3 consecutive frame bits are in
error. If this condition occurs, the hardware immediately attempts to
reframe. During the reframe time, the E1 link is declared out-of-frame, and
silence is sent on all receive timeslots.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.