Trunk Etus; Brt(4)-U( ) Etu; Description; Figure 5-11 Brt(4)-U( ) Etu - NEC ElectraElite 48 System Hardware Manual

Issue 6
S 4
ECTION
T ETU
RUNK S
5 - 16
The Electronic Telephone Unit described in this section provides a link
between equipment in the Electra Elite 48 system and outside equipment.
All ETUs are installed in the interface slots of the KSU.
4.1

BRT(4)-U( ) ETU

4.1.1

Description

The Basic Rate Trunk (BRT) Interface ETU terminates
ISDN Basic Rate Trunk lines and supports four ISDN-BRI
circuits. Each trunk supports two B channels. These eight
B channels can be used for CO trunks with DTMF
signaling. Tip and Ring electrical fuses are provided to
comply with UL 1459 requirements.
This ETU uses an S/T-type interface. A locally provided
Network Termination unit (NT1) is required to connect to a
CO. Caller ID is supported.
One BRT ETU provides a maximum of four ISDN circuits
that provide eight B channels to be used as trunks.

Figure 5-11 BRT(4)-U( ) ETU

Installing Electronic Telephone Units
Electra Elite