Nortel Networks 553-3001-211 manual Set alarm options Part 1, Option Description

NT5D33 and NT5D34 Lineside E1 Interface cards Page 281 of 894

An alarm condition is not automatically cleared until the system no longer detects the respective bit error threshold during the corresponding duration period.

For example, if AL1 threshold of 6 (representing 10-6) is specified, and a duration period of 100 seconds is specified, an alarm is activated if more than 200 bit errors occur in any 100 second period. As soon as the alarm is activated, the bit counter is reset to 0. If the next 100 seconds pass, and less than 200 bit errors are detected, then the alarm clears after the alarm’s duration period. However, if more than 200 bit errors are detected in the next 100 seconds, the alarm condition continues for the designated time period.

The alarm finally clears when the alarm condition is no longer detected for the designated period, either by self-clearing (if this function is enabled), or when the Clear Alarm (C A) command is entered.

In addition to bit errors, the Set Alarm function sets parameters for detecting frame-slip errors by establishing a threshold necessary to activate an alarm. If the threshold value is exceeded, a level 2 alarm is activated. The frame slip threshold can be specified from 1 to 255 frame slips per time period. The duration time period can be specified from 1 to 24 hours.

When entering the Set Alarm (S A) command, the MMI scrolls through the previously described series of alarm options. These options are displayed along with their current value, at which point a new value can be entered or enter <CR> to retain the current value. Table 102 outlines the options available in the Set Alarm (S A) function.

Table 102

Set alarm options (Part 1 of 2)

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.

Circuit Card Description and Installation