The PM1000II is a 4-place, panel mounted intercom with individual volume and squelch controls for the pilot and copilot. The copilot’s squelch control adjusts the trip level of the copilot and passengers. A front panel mode switch allows the pilot to select multiple intercom configurations:
“ISO” mode isolates the pilot from the intercom and connects to the aircraft radio. The passengers can continue to communicate with each other and listen to entertainment without distracting the pilot. They do not hear radio communications.
“ALL” mode places all headsets on a party line. Each one hears aircraft radio, entertainment and can use the intercom.
“CREW” allows the pilot and copilot positions to hear the aircraft radios and use the intercom, while the rear passengers can have their own intercom conversation without disturbing the crew. This also activates music 2 input.