The NCS-C250 Mobile Multi-Switcher is a Mobile Dispatch Console suited for First Responders that utilize multiple radios such as police, fire and EMS personnel. However, many customers have purchased the unit for interoperability (repeating) purposes. The unit connects four radios to one microphone and two speakers. Specific features such as crossband repeating of up to 4 radios (Selectable COR or VOX operated), hook Switch, Select/Unselect audio control and muting, and PA output make the unit more than a “microphone switch”. The NCS-C250 can be configured in systems to provide for sharing of radios between multiple units thereby reducing the number of radios required, resulting in a reduction of overall system cost. (Please see Application Note NCS-AN-101 for further information.) Alternatively, the unit may be combined with an NCS-C251 Expansion Unit for control of up to eight radios.