NEC ELECTRA ELITE IPK II - Trunk Etus; Brt(4)-U( ) Etu; Description

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6 - 20 Installing ETUs (Circuit Cards)
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Document Revision 3 Electra Elite IPK II
SECTION 5TRUNK ETUS
The Electronic Telephone Units described in this section provide a link between
trunks in the Electra Elite IPK II system and outside equipment. All ETUs are installed
in the interface slots of the KSU.
5.1 BRT(4)-U( ) ETU
5.1.1 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. When connecting to a CO, a
locally provided Network Termination unit (NT1) is required. 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 6-10 BRT(4)-U10 ETU