U-Nt Reference Points - Nortel Modular ICS 6.0 Installer's Manual

Nortel modular ics 6.0 digital system package

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50 / Welcome to ISDN

A U-LT loop supports up to eight ISDN DNs, which identify

TE to the ICS.

point-to-point

U interface TE

U-NT reference points

The U-NT reference point connection provides a point-to-

point digital connection between the ISDN network and the

A U-NT loop provides lines that can be used by all Norstar

telephones, peripherals and applications, and ISDN TE.

U-NT and U-LT loops can be used in combination to provide

D-packet service for a point-of-sale terminal adapter (POSTA)

or other D-packet device. D-packet service is a 16 kbps data

transmission service that uses the D-channel of an ISDN line.

To deliver D-packet service, a network connection (U-NT) is

programmed to work with a terminal connection (U-LT). The

loops must be on the same physical card. For example, if the

Modular ICS 6.0 Installer Guide