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.