- Use with SIP (Session Initiation Protocol) VoIP PBXU - Use with Valcom multi-zone page control unit with Centrex or C.O. lines (DTMF signaling only) - Use with Valcom handsfree page units for talkback paging - Multiple units may be connected for multi-zone paging with all call behind a PABX - Background music, stereo or mono input; music mutes during page - Volume controls for background music and tones - Security code option to restrict page access - Store & Play feedback eliminator option - Multiple disconnect options - Page verification tone - Customizable Page alert tone - Drive up to 150 one-way amplified speakers on 8 Ohm output (one-way output) - Web interface for programming extended functions