4.10 Prt(1)-U( ) Etu; Description - NEC ElectraElite 48 System Hardware Manual

Electra Elite
System Hardware Manual

4.10 PRT(1)-U( ) ETU

4.10.1

Description

The PRT(1)-U( ) ETU is a Digital Trunk Interface that
provides for the termination of an ISDN-PRI line for voice
service only.
The PRT(1)-U( ) ETU supports AT&T 4ESS (Custom),
AT&T 5ESS (Lucent), DMS-100 (Custom or National
ISDN) and NI-2 protocols. Call-by-Call and Universal call
handling are also supported. Tip and Ring electrical fuses
are provided to comply with UL 1459 requirements.
Figure 5-29 PRT(1)-U( ) ETU
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