Black Box COMPACT T1 User Manual

Page 35

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Compact T1 - Release 6.1

31

Quick

Start

Controller Cards

LEDs

The T1 Controller has a set of six LEDs you can use to troubleshoot your Compact
T1. The table below describes each LED.

LED

State

Description

MAJOR

Off

No major alarms present

Red

Major alarm present

MINOR

Off

No minor alarms present

Yellow

Minor alarms present

LOCAL

Off

Remote mode (DIP switches disabled)

Green

Local mode (DIP switches enabled)

ACO

Off

Normal mode. No alarms are being
suppressed.

Yellow

Alarm cutoff active. One or more active
alarms suppressed.

T1-1 and
T1-2

Off

Off line

Green

Normal

Red

Loss of Signal (LOS) detected

Yellow

Bipolar Violation (BPV) detected

Flashing Green

Loopback active

Flashing Red

Loss of Frame (LOF) or Alarm Indication
Signal (AIS) detected

Flashing Yellow

Yellow alarm (Remote Alarm Indication)
detected.

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