Avaya 11-300244 사용자 설명서

Avaya Modular Messaging Concepts and Planning Guide

13-2

November 2004

Avaya Modular Messaging Concepts and 

Planning Guide

When planning a Modular Messaging implementation, Avaya 
recommends that planners include redundancy. 

Planning for redundancy includes planning for:

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In addition, power redundancy must be considered. Avaya requires that 
all servers are connected to a UPS for power backup.

Messaging application server (MAS) redundancy means that when one of 
the MAS units in a multi-MAS voice mail domain goes out of service, the 
system can continue to send and receive messages.

Use the following guidelines when planning for MAS redundancy:

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Ensure that the voice ports are distributed evenly across MAS 
units in the voice mail domain. To do this, install a balanced 
number of voice cards on each MAS. This ensures that if one or 
more MAS units are out of service, an adequate number of voice 
ports are still available.

For more information on voice ports, see 

 on page 8-2.

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With Digital Set Emulation or QSIG telephony, ensure that 
incoming port groups for all MAS units are in the same hunt 
group. If incoming port groups are in different hunt groups, calls 
presented to a port group on an MAS that is out of service may 
not be routed to another voice port on an available MAS. 

For more information on hunt groups, see 

 on 

page 8-8.

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When using an integration device, such as PBXLink, one can 
plan for redundancy by using a separate integration device for 
each MAS in the voice mail domain. This ensures that if an MAS 
goes out of service, all remaining MAS units are still connected 
to the switch.

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When using analog telephony, use wiring to enable two MAS 
units to be serviced by a single extension on the switch. This 
ensures that if one MAS is not available, calls from the switch 
extension can go to the other MAS.