Profile: Ring Communications, Inc. develops & manufactures internal communication control, alarm and security surveillance systems. The PRO700 system is a small, decentralized, hands-free intercom system for up to 40 master stations or substations. All stations are microprocessor controlled providing a wide variety of standard and programmable features. A digital display is also included for stations readout, absence indication and station call-in ID. Only two pair wire, looped, is required for operation. Program distribution channel is also available on an additional pair of wires. The brands we offer include Ring-Master™ and Tridex™.