Bri-U2 And Bri-U4 Card; Bri-St Card; U-Lt Reference Point - Nortel Modular ICS 6.0 Installer's Manual

Detailed wiring information for BRI and PRI network and
terminal connections is included in the Installation on page
209.

BRI-U2 and BRI-U4 card

A BRI-U2 card supports two loops and the BRI-U4 supports
four loops. Each loop can be individually programmed to
provide one of the following:
• a U-LT reference point connection for terminal equipment
(TE) with built-in NT1 functionality (U interface)
• a U-NT reference point connection for direct connection to
an ISDN network

BRI-ST card

A BRI-ST card provides four loops. Each loop can be
individually programmed to one of the following:
• an S reference point connection (S loop) to ISDN terminal
equipment (TE)
• a T or S reference point connection (T loop or S loop) to an
ISDN network using an external NT1

U-LT reference point

The U-LT reference point connection provides a point-to-
point digital connection between Norstar and TE equipped
with a U interface.
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Modular ICS 6.0 Installer Guide