Nortel NT1R20, Description

Page: 198 / 316

Page 174 of 290 NT5D33 and NTRB34 Line-side E1 Interface Cards
553-3001-105 Standard 5.00 June 1999
When entering the
Set Alarm (S A)
command, the MMI will scroll
through the previously described series of alarm options. These options will
be displayed along with their current value, at which point you can enter a
new value or enter a
<CR>
to retain the current value. Table 46 outlines the
options available in the
Set Alarm (S A)
function.
Note: If the duration period set is too long, the Line-side E1 card will be
slow to return to service automatically even when the carrier is no longer
experiencing errors. The
CLEAR ALARM (C A) command will have
to be entered manually to restore service promptly. To avoid this, an
alarm’s duration period should normally be set to 10 seconds.
Table 46
Set alarm options
Option Description
AL1 Threshold Sets the allowable bit errors per second before
alarm level 1 is activated. Factory default is 6.
AL1 Duration Sets the duration in seconds (from 1 to 3,600
seconds) that alarm level 1 is activated. Factory
default is 10 seconds.
AL2 Threshold Sets the allowable bit errors per second (from 3 to
9) before alarm level 2 is activated. Factory default
is 10
-5.
AL2 Duration Sets the duration in seconds (from 1 to 3,600
seconds) that alarm level 2 is activated. Factory
default is 10 seconds.
Frame Slip Threshold Sets the allowable frame slips per time period (from
1 to 255) before alarm level 2 is activated. Factory
default is 5.
Frame Slip Duration Sets the duration in hours (from 1 to 24) that the
frame slips are counted. After this time period, the
counter is reset to 0. Factory default is 2 hours.