Avaya G700 Overview Manual page 14

Main Components
Avaya MM720 BRI Media Module
The MM720 contains eight ports that interface to the central office at the ISDN T reference point.
Information is communicated in two ways:
•
Over two 64 Kb channels called B1 and B2
— Can be circuit switched simultaneously
•
Over a 16 Kb channel called the D channel
— Used for signaling
— Occupies one time slot for all eight D channels
The circuit switched connections have a u-law or A-law option for voice operation. The circuit switched
connections operate as 64 Kb clear channels when in the data mode.
The MM720 does not support the following:
•
BRI stations
•
Combining both B channels together to form a 128 Kb channel
See the following figure for an example of the MM720.
Figure 7: Avaya MM720 BRI Media Module
For more information on the MM720 see Hardware Guide for Avaya Communication Manager.
Avaya MM760 VoIP Media Module
The MM760 is a clone of the motherboard VoIP engine. The MM760 provides an additional 64 VoIP
channels with G.711 compression.
The capacity is 64 G.711 TDM/IP simultaneous calls, or 32 compression codec, G.729 or G.723, TDM/IP
simultaneous calls. These call types can be mixed on the same resource; in other words, the simultaneous
call capacity of the resource is 64 G.711 equivalent calls.
See the following figure for an example of a MM760.
Figure 8: Avaya MM760 VoIP Media Module
For more information, see Hardware Guide for Avaya Communication Manager.
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mmdc712 KLC 022702 mmdc712 KLC 022702
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Overview for G700 and S8300
December 2003