Radio telephone system having emergency speech control
Rapid response backup system for telecommunications networks
Real-time incident and response information messaging INA...
Reminder phone
Remote actuated command circuit for seizing telephone lines
Remote conference calling for wireline systems
Remote conference calling for wireline systems
Remote control of a speaker phone device as a standalone...
Remote control of a speaker phone device as a standalone...
Remote control unit for radio/television transmitter station
Remote security system
Remote subscriber loop terminal alarm monitoring
Remote supervisory monitoring and control apparatus connected to
Remote supervisory monitoring and control apparatus connected to
Remote supervisory monitoring and control system
Remotely accessed alarm system
Remotely accessible security controlled audio link
Remotely-activated telephone system for communication with the d
Response advisor for a call handling system
Reverse registration method in a system for the automatic...