Our Emergency Firebar and Ring Down Telephone Conference System provides a unique feature set that is designed for secure locations where instant communications is important. The XOP Networks Emergecny Ring Down System provides telephone ring down capabilities to multiple locations. The unique fire bar features allows for a single phone in a firebar group to go off hook and automatically call the other phones in the group and connect callers to a single conference. The Blast Dial feature can call a group of telephone numbers for instant communications. Perfect for Military installation, airports, university campuses, volunteer fire departments, security firms, secure buildings . Our Ring Down System is an excellent replacement for Tellabs 291/292 systems.