Parallel off hook detector for electronic remote data recorder
Parallel phone detection circuit
Periodic and automatic telephone redialling system and method
Personal ring tone message indicator
Personal ring tone message indicator
Personalized telephone announcement
Personalized telephone signaling circuitry and device, and metho
Phase accumulation dual tone multiple frequency generator
Phone apparatus having redialing function capable of surely...
Phone busy circuit
Phone number database for a phone
Photo screen scroll graphic user interface
Polled geofencing and distinguished ring-back
Portable automated dialer with tone completion indicator
Portable automatic dialing unit
Portable telephone
Portable telephone and character input method
Portable telephone maintenance service system and...
Portable telephone set and method for inputting said...
Portable telephone set housing having an illuminated switch pane