The MM710B E1/T1 media module terminates an E1 or T1 trunk. The MM710 media module has a built-in Channel Service Unit (CSU), therefore, an external CSU is not necessary. The CSU is only used for the T1 circuit.
Note:
The information in this section applies to the MM710 media module as well.
The MM710B media module provides the following features:
ISDN PRI capability (23B+D or 30B+D)
Trunk signaling to support US and International CO, or tie trunks
Echo cancellation in either direction