AEQ DIGITAL COMMENTARY UNIT Customer's Manual page 38

On the other hand it establishes a technical coordination circuit with the CU
which originates in its own CCU (LOCAL T' BACK) or sent from the local
technical coordination center (TCC) next to the control computer (REMOTE
T' BACK).
The monitor module (MM) checks the quality of the common signals (IS1, IS2,
CUE 1, CUE 2 and P.A.) both optically and audibly, as well as of those
specifically from each module (PROG GO, PROG F´B, CC GO, CC F´B,
GUIDE, AUX, IS and P.A.)
This module also has the necessary elements for the intercommunication with
the coordination and program circuits (previously mentioned referring to the
CM), and to allow the access to the local technical intercommunication circuit
(LOCAL T' BACK) and to an external 4 wire intercommunicator which
performsthe function of REMOTE T' BACK.
Digital Commentary System
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