User manual

Alarm Reporting

Overview

12-2 July 2004 Wide Bank 28 DS3 - Release 2.4

Overview

The Wide Bank reports alarms in several ways. First, there are LEDs that indicate that alarm events have

occurred. Second, the alarm events that occur are entered into an event log. Third, certain SNMP traps

are generated when alarms occur. Finally, the Wide Bank reports alarms via the Transaction Language

One (TL1) messaging system, in compliance with:

 Telcordia GR-474, Network Maintenance: Alarm and Control for Network Elements

 Telcordia GR-820, Generic Digital Transmission Surveillance

The Wide Bank alarms are categorized as either Critical, Major, or Minor. Critical alarms are those that

will adversely affect traffic at the DS3 level. Major alarms are those that adversely affect traffic at the

low-speed (DS1 or E1) level. Minor alarms do not affect traffic but do affect standby circuits.

Critical, Major and Minor Alarms

NOTE: The following information and charts are based on the default values assigned

to the alarm severities. Many of the alarm conditions can be assigned a different alarm

severity by using the TL1 command SET-ATTR-<AIDType> on page 9-75.

The chart on the following page shows the alarm conditions that generate critical and major/minor

alarms.

 Critical Alarms. Critical alarm events cause the Critical Alarm LED to light red, the critical

alarm relay contacts to activate, and the appropriate log entries to be recorded.

 Major and Minor Alarms. Major/ minor alarm events cause the Major/Minor Alarm LED to

light red (major) or yellow (minor), the major/minor alarm relay contacts to activate, and

appropriate log entries to be recorded.

 Alarm Cleared. When the alarm condition no longer exists, the LED and the relay contacts will

deactivate.

 Alarm Cutoff (ACO). You can override the alarm condition, turn off the LED, and deactivate the

relay contacts by pressing the ACO switch on the front control panel, or by issuing the aco

command from the Command Line Interface. ACO is a momentary action, and does not affect

subsequent alarm reporting.