Inter-M PX-6216 - Manual (Page 9)

5. AUDIO OUTPUT TERMINAL
8 bus balanced audio output terminal.
6. EMERGENCY PANEL (EP) CONNECTION TERMINAL
This terminal allows for connecting emergency panel unit (EP-9216,9216V,616,6216, etc.) with
priority broadcasting.
7. RS-232 SOURCE UNIT CONTROL TERMINAL
RS-232 communication terminal allows control inter-M source units (CDP, TUNER, VOICE FILE, etc.)
via the PC operation program.