Mm710 E1/T1 Media Module; Mm720 Bri Media Module - Avaya G250 Overview

Figure 12: The MM717 media module

MM710 E1/T1 media module

The MM710 T1/E1 media module terminates a T1 or E1 trunk. The MM710 has a built-in
Channel Service Unit (CSU) so an external CSU is not necessary. The CSU is only used for the
T1 circuit.
The MM710 features:
ISDN PRI capability (23B + D or 30B + D)
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Trunk signaling to support US and International CO or tie trunks
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Echo cancellation in either direction
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Figure 13: The MM710 media module

MM720 BRI media module

The MM720 BRI media module provides eight ports with RJ-45 jacks that can be administered
either as BRI trunk connections or BRI endpoint (telephone and data module) connections.
Note:
The MM720 BRI media module cannot be administered to support both BRI
Note:
trunks and BRI endpoints at the same time. Also, the MM720 BRI media module
does not support combining both B-channels together to form a 128-kbps
channel. Finally, if the MM720 BRI Media Module is administered to support BRI
endpoints, it can not be used as a clock synchronization source.
For BRI trunking, the MM720 BRI media module supports up to eight BRI interfaces to the
central office at the ISDN TE reference point. Information is communicated in two ways:
Over two 64-kbps channels, called B1 and B2, that can be circuit-switched simultaneously
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Over a 16-kbps channel, called the D-channel, that is used for signaling. The MM720
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occupies one time slot for all eight D channels
The circuit-switched connections have an A- or Mu-law option for voice operation. The
circuit-switched connections operate as 64-kbps clear channels when in the data mode.
Supported media modules in the G350
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