Clear-Com MS-702 - Two-Channel Main Station for Encore Series IntercomCompact, feature laden, single rack space intercom main station supports up to 60 headsets or 20 speaker stations on two intercom channels. Fail safe power supply has separate short circuit protection and auto reset for each channel. Other features include: Channel A B linking; visual and audible call signaling; program input with individual channel level controls and program on off interrupt switches; remote mic kill switch, external relay circuit;