Avaya IP Office - Manual (Page 17)

Voicemail Pro Installation Page 17
EN-S Issue 01b (20 June 2011) IP Office
Windows Server Installation: General Installation Requirements
Ports
The Voicemail Pro service uses the following ports.
Port Number Type Description
25 TCP Used to listen for SMTP connections.
37 UDP Used to receive time requests (RFC 868).
143 TCP Used to service IMAP4 requests.
50791 UDP Used to receive requests from IP Office PBX.
TCP Used to receive requests fromone-X Portal for IP Office.
50791 TCP Used to receive connections from Voicemail Pro client.
Note that additional ports may be used for connection to services such as 3rd party database or Microsoft Exchange.