Registration control circuit
Registration of a new cordless telephone to an existing system
Relay for personal interpreter
Relay for personal interpreter
Relay range extender for telephone systems
Relay system
Relaying of message waiting indications to support...
Relayless switching circuit
Remote access for centrally located answering and recording...
Remote access systems
Remote access, emulation, and control of office equipment,...
Remote answering of doorbell
Remote babysitting monitor
Remote communication and control for a telephony device
Remote confinement system
Remote confinement system
Remote control device for an automatic telephone answering...
Remote control device for an automatic telephone answering...
Remote control of a security system using telephone device
Remote control of a speaker phone device as a standalone...