Tone based answer detection for IP based telephones
Transient signal elimination circuit for telecommunications appl
Transient signal elimination circuit for telecommunications appl
Two way telephone communication system
Two-way voice communication methods and apparatus
Two-wire telecommunications line detection arrangements
Two-wire telecommunications line detection arrangements
User programmable station set bass and treble control
Voice activity detection system and method
Voice activity detector for half-duplex audio communication syst
Voice activity detector for half-duplex audio communication syst
Voice direction recognition in a digital telephone station
Voice messaging system caller ring bypass control
Voice operated switch
Voice switch used in hands-free communications system
Voice transmission systems with voice cancellation
Voice-switched handset receive amplifier
Zero crossing detection circuit