Avaya Aura® Messaging is a SIP-based messaging system. However, when coupled with a SIP gateway, Messaging supports a wide variety of analog, digital, and H323 telephony servers and telephones.
In large organizations with specialized administration roles, the switch and messaging administrators might be different individuals. If this is true for your organization, you may need to coordinate integration activities because some telephony parameters must be identical on the telephony and application servers.
For information on LAN ports used by Messaging servers, see Traffic flow.