158 / ISDN PRI and BRI

ISDN BRI

Modular ICS 4.0 supports a maximum of 30 ISDN sets on the system.

The following ISDN services are supported:

incoming calls

outgoing calls

Calling Line Identification Presentation

Sub-addressing

bearer capabilities

teleservices

The Call Forward All Calls feature can be used from ISDN terminals connected to Modular ICS.

Note: Norstar sets can accept voice calls only. Video and data calls do not alert at a Norstar set.

Although an ISDN S-loop or LT-loop can support up to eight devices, the loop has a limit of two B-channels. If both B- channels are in use, other devices on that loop cannot make or receive calls until a B-channel is available, or until both B- channels are available in the case of a video terminal. Thus, the number of terminals installed must take into account whether you require dedicated access for the terminals on that loop.

Note: Norstar set features, other than Transfer and Call Forward All Calls, are not available to ISDN terminals. In addition, you cannot retrieve a parked call, or reach a Direct-Dial set by using the Direct-Dial digit from an ISDN terminal.

Modular ICS 4.0 System Coordinator Guide

P0881591 Issue 01

Page 170
Image 170
Nortel Networks Modular ICS 4.0 manual Isdn BRI