Pliant Crewcom CCU-22 Operating Manual page 61

C. Intercom Type: Allows selection from the four possible intercom types: Off, RTS, AudioCom (Balanced), and
ClearCom. The below types of intercom only affect 2-Wire operation and do not control 4-Wire operation.
When connecting to a 4-Wire intercom system, you must enable the port (On/Off) before using. The default
setting for Intercom Type is OFF.
Figure 26 2-Wire Intercom Type Options
3-Pin Wiring Scheme
Pin # Clear-Com AudioCom
1 Common Common
2 Power Audio (-) & Power Audio 1 & Power
3 Audio Audio (+) & Power Audio 2
Figure 27 3-Pin Male XLR Pin Out
RTS
Common
Operation - 53