The LEF-10S is a selective call open voice system master station with the capacity of up to 11 total stations. Any combination of subs and masters can be used up to its maximum capacity. The LEF-10S has the ability to place and all call to all stations in the system (requires BG-10C). The system can be designed to meet a wide variety of needs, including any combination of master and sub stations up to its maximum capacity. Incoming calls from a sub or door station sound an electronic mono-tone and light an LED, remaining lit for approximately 20 seconds. Communication at the calling master is press-to-talk, release-to-listen. Person at the receiving station speaks hands free. The person at the master station can selectively call and talk with a person at any other sub or master station in the system. An All Call announcement can be made from the master station, heard through all stations in the system. The privacy feature on the master and selected subs prevents a master from hearing sounds from a station in the privacy mode. Master stations can be wall or desk mounted. Sub stations are available in surface or flush mount styles, with or without privacy.