I have a Nortel Modular ICS 5.0 phone system with Norstar Voice Mail4.0.
Most of my phones will display the "On Another Call" message when the person you are calling is on 1 of the 2 intercoms for the phone. I have looked at all of the settings and can't figure out why just a few phones do not display this.
Can anyone help me???
Thanks, Joe Krocker