Nortel Networks 553-3001-211 manual Yellow Alarm, T1 performance counters and reports

Page 214 of 894 NT5D11 and NT5D14 Lineside T1 Interface cards

When the first level of severity is reached (alarm level 1), the MMI will do the following:

•activate the external alarm hardware

•light the appropriate LED on the faceplate (either RED ALARM or

YELLOW ALARM)

•display an alarm message on the MMI terminal

•create entry in the alarm log

When the second level of severity is reached (alarm level 2), the MMI will perform all of the same functions as alarm level 1, and in addition, force the lineside T1 card to enter trunk processing mode. In this mode, the terminal equipment will be sent either “on-hook” or “off-hook” signals for all 24 ports to the CS 1000S, CS 1000M, and Meridian 1, depending on how the dip switch for trunk processing was set (dip switch #2, position #6).

If the MMI detects T1 link failures for any of the remainder of the conditions monitored (out of frame condition, loss of signal condition, and blue alarm condition), the lineside T1 card automatically performs all alarm level 2 functions. The MMI also sends a yellow alarm to the distant end CPE or CSU.

Alarms can be set up to self-clear or not self-clear when the alarm condition is no longer detected.

All alarms activated produce a record in an alarm log. The alarm log maintains records for the most recent 100 alarms and can be displayed, printed and cleared. The alarm log displays or prints the alarms listing the most recent first in descending chronological order. The alarms are stamped with the date and time they occurred.

T1 performance counters and reports

The MMI maintains performance error counters for the following T1 conditions:

•errored seconds

•bursty seconds

•unavailable seconds

553-3001-211 Standard 2.00 September 2004