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Avaya Modular Messaging Concepts and Planning Guide
8-2
November 2004
Avaya Modular Messaging Concepts and 
Planning Guide
Voice ports
Messaging application server (MAS) units provide a critical link between 
the telephone call switching equipment and the message store. MAS units 
communicate with the switch by means of a number of telephone 
end-points known as voice ports. Voice ports receive inbound calls and 
place outbound calls in the same way as any other extension on the 
switch.
Avaya Modular Messaging supports a range of voice cards, offering 
various port densities, from 4-port cards upwards. 
Note: H.323-based IP integration does not use voice ports. All 
further references to voice ports are equivalent to voice 
channels for H.323-based IP integration.
Voice ports or channels can be configured into port groups that are 
associated with the following Avaya Modular Messaging components:
!
Telephone user interface (TUI)
!
PC client
!
Call Me Server
!
Message Waiting Indicator (MWI)
!
Fax
Voice cards provide telephony signaling to the Avaya Modular Messaging 
software. The way in which this signaling is implemented depends on the 
telephony protocol. For example, with inband analog telephony, the 
signaling is implemented in the voice path. With other types of telephony 
protocol, for example, Q-Signaling (QSIG), a separate signaling channel 
is used.
For more information on telephony protocols, see 
 on 
page 8-8.