Nortel Networks P0857846 - Manual (Page 106)

Tracking your incoming calls / 93
P0857846 Issue 02 Norstar-PLUS Modular ICS 2.0 System Coordinator Guide
Using Voice mail
If you subscribe to a voice message service outside your office, you
can access that service through your Norstar system. Your installer
or customer service representative programs your Norstar
telephone to indicate when you have a voice message waiting on a
particular line.
To find out if your external voice message service will work with
Norstar, or if you have any problems with your service, contact your
voice message service provider.