The UTI312 Zone Paging Contoller provides multi-zone paging for one-way applications such as self-amplified speaker systems, with each output capable of providing audio for up to 150 self-amplified speakers.The UTI312 is compatible with all standard analog port types. Each UTI312 comes with a pre-installed ZX3 module for three zones of paging and is expandable up to 12 zones. The UTI312 offers up to 24 programmable paging zone groups as well as all-call, auto select, override, night ring, two tone triggers, and code calling zone groups.The UTI312 also offers flexible dialing. Expandable from 3 up to 12 zones using ZX3 modules Up to 24 programmable paging zone groups Telephone interfaces: loop start trunk, ground start trunk, station access (analog ring-up), page port contact closure activation, page port voice activation Simple 2-switch interface setup Programmable activation of AUX contacts C-form contact per zone 24V DC, 1A internal power supply Provides audio drive for up to 150 one-way self-amplified speakers per zone Adjustable output limiter with threshold control and active indicator Two background music busses, selectable per zone Two high-impedance transformer isolated background music inputs Stereo combining inputs for background music busses All-Call paging zone group Auto Select paging zone group Override paging (using loop start trunk or page port contact closure activation) with zone group Night Ringer (90V and contact closure activation) with zone group Two Tone Triggers (tone and duration selectable, closure activated) with individual zone groups Select tone burst, chime, double chime, or slow whoop Code Calling with zone group 2 to 5 Digit dialing with flexible dialing plan for zone and zone group numbers Non-volatile memory for setup data (no backup battery required) Pre-Announce Tone Confirmation Tone Setup Tone to assist in volume setting Pluggable terminal strips Microcontroller-based operation DTMF programming DTMF Block to help suppress DTMF tones over paging system Programmable timers control page duration (station and trunk) Wall- or Rack-mountable Two-Year Warranty (both UTI312 and ZX3) ZX3 One ZX3 module pre-installed with UTI312 3 zones per module Audio output with level control per zone Zone contact closure Zone activity LEDs Pluggable terminal strips