4channel Switchboard Main Station with Built-in Power Supply

4-Channel Switchboard Main Station - 5-channel X 10 station assignment matrix, no speaker - with built-in 2-amp power supply, rack mount (2RU)..SB-704 includes all of the features of the MS-704, with a 4 x10 assignment matrix in place of the internal speaker (external speaker required for station monitoring). The station features a ten-position slide switch matrix that allows assignment of any of the ten intercom lines to any of the four intercom channels, to an isolated separate party-line, or to an off position.

• Supports up to 55 beltpacks or 10 speaker stations on four channels
• 10 x 4 assignment switching matrix
• Separate short-circuit protection for each channel
• Dual-action electronic momentary/latching Talk buttons
• Three interruptable IFB channels
• Call signal buttons for each channel
• Global Remote Mic Kill
• Announce output with relay
• Microphone limiting
• Volume controls for each channel
• Visual and audible Tone Alert signaling
• Channel linking
• External switchable line termination on each channel
• Universal voltage power supply