Coid(4)/(8)-U( ) Etu; Description - NEC Electra Elite IPK II System Hardware Manual

Electra Elite IPK II
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5.7
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System Hardware Manual

COID(4)/(8)-U( ) ETU

5.7.1

Description

The COID(4)/(8)-U( ) ETU is the Central Office interface for Caller ID
Detection. This ETU provides circuitry for outside ring detection,
hold, dialing, Caller ID detection, and control functions.
The COID(4)/(8)-U( ) ETU provides four/eight trunks that are Loop
Start with DTMF signaling only. Tip and Ring electrical fuses are
provided to comply with UL 1459 requirements.
Figure 6-22 COID(8)-U( ) ETU
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