V.90 over all-digital connections
Variable low frequency offset, differential, OOK, high-speed...
Video caller identification systems and methods
Video caller identification systems and methods
Video caller identification systems and methods
Video caller identification systems and methods
Videotex terminal apparatus using an IBM PC XT
Videotex with telephone call screening system
Visual calling person display
Visual communication terminal apparatus for performing multiplex
Voice and data transmission over twisted wire pairs
Voice and fax over IP call establishment in a communications...
Voice bridge for a relay center
Voice bridge for relay center
Voice communication apparatus
Voice communications apparatus
Voice controlled business scheduling system and method
Voice data modem, voice data method and voice data modem system
Voice dialing system
Voice over DSL method and system for supporting a lifeline