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Modular Messaging features
November 2004
Avaya Modular Messaging Concepts and
Planning Guide
5-21
Offline messaging
Modular Messaging supports offline messaging in the following
scenarios:
! Offline Call Answer
If a message store (Avaya MSS, Microsoft Exchange, or IBM
Lotus Domino) cannot be accessed, Modular Messaging
continues to provide basic Call Answering services. Some
features operate in a degraded fashion. For example, some
features, such as Call Me, Notify Me, MWI, and certain Caller
Applications are either not available at all or are delayed.
Subscribers’ greetings are not available and are replaced by a
system prompt with the spoken or TTS name of the subscriber.
For more information, see Offline Call Answer
on page 5-22.
! Offline access to Call Answer messages
Modular Messaging Aria telephone user interface (TUI)
subscribers can use a telephone to access their new Call Answer
messages. For more information, see Offline access to Call
Answer messages on page 5-23.
! Offline Microsoft Exchange peer server
When a Microsoft Exchange peer server goes offline, the
messaging application server (MAS) selects another Exchange
server to act as the peer server. Thus, the MAS continues to
support messaging, even when its primary peer server is offline.
For more information, see When a Microsoft Exchange message
store goes offline on page 5-24.
! Offline IBM Lotus Domino message store
For more information, see When an IBM Lotus Domino message
store goes offline on page 5-25.
! Offline MAS units
If an MAS unit goes offline and if an N+1 server configuration
has been implemented, voice port redundancy is achieved,
although certain services may be affected. For more information,
see N+1 server configuration
on page 5-27. In any event, while
one or more MAS units are unavailable, subscribers may use
Unified Communication Center (UCC) Speech Access or
graphical user interfaces to send messages or to retrieve messages
stored up to the point of lost contact. If no MAS units are
available, messages must be played or recorded by graphical
clients using the local PC multimedia capabilities.