Hardware Description and Reference for Avaya ... - Avaya Support

Echo cancellation
MM710 T1/E1 Media Module
The MM710 Media Module can cancel echoes in either direction for any DS0. The MM710 can
cancel echoes with tail-end delays up to 96 milliseconds. the MM710 is compatible with either
A- or Mu-law code.
CSU function
The CSU functionality that is built into the MM710 Media Module has the following capabilities:
● Capable of long-haul or short-haul transmission
● Can receive signals as low as -36 dB
● Can compensate for distances up to 655 feet (200 meters) in short-haul operation
● Attenuation up to -22.5 dB can be programmed when driving repeaters for long-haul
transmission
Loopback and BERT functions
The loopback and bit error rate testing (BERT) functionality in the MM710 Media Module has
the following characteristics:
● Provides a passive loopback for the far-end in an unpowered state
● Can be set up for line or payload loopbacks.
● Supports incoming and outgoing ESF FDL requests
● Can generate and respond to in-band loop up and loop down codes per ANSI-T1.403
● Supports the generation and detection of test patterns and injection of bit errors for Bit
Error Rate Testing
E1 impedance
By itself, the MM710 Media Module can be configured for balanced 120-ohm E1 operation. An
external balun is required for 75-ohm unbalanced operation.
Bantam jacks
Six bantam jacks on the faceplate of the MM710 Media Module provide access to the incoming
and outgoing T1 signals or E1 signals:
● SM allows passive monitoring of the incoming line.
● EM allows passive monitoring of the outgoing line.
● SO allows intrusive monitoring of the incoming signal from the network. When used, the
SO jack breaks the connection of that signal to the framer.
Issue 6 February 2007 287