AEQ DIGITAL COMMENTARY UNIT Customer's Manual page 42

The CCU, together with possess a technical local coordination circuit (LOCAL
T' B) that can be used by the technician to communicate with the commentators,
offers the chance to enable an INTERCOM mode to allow the technician to
incorporate into the program circuit or the coordination circuit in the GO way,
F' B way or both.
A microphone or input line can also be routed, through the monitor module, to
any line identifier (ID) recording circuits to record its message.
Digital Commentary System
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