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MAS Intro - The Messaging Application Server

The Messaging Application Server (MAS) provides an interface between the message store (and directory) and the telephone system. In older documentation, the MAS is sometimes referred to as the “voice server”.

A Modular Messaging system consists of at least one MAS and an Avaya-produced Message Store Server (Avaya MSS). Modular Messaging supports a maximum of five MAS units in a voice mail domain; plus a standalone supplementary server.

In this release, all new installations of the MAS software reside on the Avaya-provided S8730 server platform running Microsoft Windows 2003 R2 Server Appliance Kit. The MAS software of the upgraded Modular Messaging releases can reside on the Avaya-provided S3500 server platform.

Avaya Modular Messaging Release 5.0 introduces a new feature, MultiSite, that enables you to use a single Modular Messaging system consisting of many MASs to service a global organization. With MultiSite you can group distributed Modular Messaging sites under a single Voice Mail Domain (VMD).

In a MultiSite-enabled environment, the MASs are co-located with the Avaya MSS in a data center, but the subscribers can be anywhere. The MASs communicate through the WAN with distributed SIP gateways that are installed near the PBXs at the various sites to service the subscribers. All MASs in the voice mail domain can handle requests from subscribers associated with any site and from any configured switch.

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