The Telex MCE-325 User Programmable User Station is a 4-channel intercom station used to establish monitoring and communication within an RTS compatible intercom system. The MCE-325 may be used as a headset station or as a speaker station with the optional MCS-325 modular speaker. It's completely compatible with 2 or 4 wire intercom lines (or combination of both). An array of external sources may be interfaced with the MCE-325, including two-way radios, paging systems, satellite circuits and more.