When programming voice mail, follow the guidelines below to ensure that users get a message waiting indication when they have new messages in their mailbox.
To send a message waiting indication, the voice mail system hunts for a free port starting from the highest port to the lowest port.
For systems that are configured with 20 ports, the voice mail system will not look for ports above port 20.
For systems that are configured with 30 ports, the voice mail system will not look for ports above port 30.
The port that it picks must be in the Voice Mail hunt group.
All voice mail ports must be in a hunt group of type VoiceMail (voice mail hunt group). You can have one voice mail hunt group for the system, or multiple voice mail hunt groups.
If Record-A-Call is enabled: the voice mail ports assigned to Record-A-Call must be assigned to a hunt group of type Recorder as well as to the voice mail hunt group. Do NOT remove these ports from the voice mail hunt group.