NEC Australia Pty Ltd Xen Master & Xen Axis
5 - 132 Installing Electronic Telephone Units
A6-324000-642-01 – Release 4.0
May 2001
4.5.4 LED Indications
Live LED indications are listed below.
✆ Blinking Red Normal Operation
✆ Steady Red Operation Stopped (power still on)
✆ Off No Power
LED 101~801 indications are listed below.
✆ Steady Red Lines 1~8 busy
✆ Off Lines 1~8 idle
4.5.5 Connectors
The following connector is located on the COID(8)-U( ).
✆ CN1 Connects to the backboard
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.
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