Coid(4)-U( ) Etu - NEC Xen Master System Hardware Manual

NEC Australia Pty Ltd
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4.5.4 LED Indications
Live LED indications are listed below.
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LED 101~801 indications are listed below.
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4.5.5 Connectors
The following connector is located on the COID(8)-U( ).
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4.6

COID(4)-U( ) ETU

4.6.1 Description
The COID(4)-U13 (U19 New Zealand) ETU provides an
interface with the Central Office for Caller ID Detection.
This ETU provides circuitry for outside ring detection, hold,
dialling, Caller ID detection, and control functions.
It also incorporates line reversal detection and busy tone
detection circuitry.
Blinking Red Normal Operation
Steady Red Operation Stopped (power still on)
Off No Power
Steady Red Lines 1~8 busy
Off Lines 1~8 idle
CN1 Connects to the backboard
Installing Electronic Telephone Units
Xen Master & Xen Axis