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 H.323 telephony servers and telephones.
In large organizations with specialized administration roles, the telephony 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.
Avaya provides Configuration Notes with telephony-specific configuration information. You can download these Configuration Notes from the Avaya Support website at http://www.avaya.com/support.
Ensure that your telephony server has sufficient resources dedicated to the messaging functionality. The variables for calculating capacity and determining the number of SIP trunks to dedicate to Messaging are:
The amount of network traffic that flows through your Messaging system.
The number of ports reserved for Messaging.
The types of telephones your organization uses.