Nortel Networks CVX 600 manual Connecting Alarms, Alarm Categories, Alarm Possible Cause

CVX 600 Hardware Installation Guide

Connecting Alarms

Connecting Alarms

Introduction

The SCC-LTM and SCC-RLTM contain a terminal block that allows you to connect up to three audible alarms and three visual alarms. These alarms alert you to critical, major, and minor conditions. The left six screw terminals on the terminal block are available for visual alarms, such as lights; the right six screw terminals are available for audible alarms, such as bells.

Warning: The contacts on the terminal block are rated at 30 VAC and have a maximum current rating of 1 ampere (A). The circuit connecting the alarms must meet the requirements for safety extra-low voltage (SELV). The wires connecting the alarms must be the appropriate gauge for alarm devices.

During normal, uninterrupted operation, the contacts remain open. If a failure occurs, the contacts close and trigger the connected alarm.

Alarm Categories

The following table lists the three general categories of alarms and the possible causes:

Alarm	Possible Cause
Critical (Crit)	Hardware failures: the system power supply and fan module have
	failed, for example.
Major (Maj)	Communication failures: the link or network connection has failed.
Minor (Min)	Modem failures: the configured thresholds have been exceeded.

2-2 296-1011-202 Rel. 5.0, Doc. Rev. 02.01