Technique for compensating for signal attenuation on a telephone
Techniques for improving telephone audio quality
Telecommunication device
Telecommunication line driver having synthesized output...
Telecommunications end station with electrically controlled term
Telecommunications network interface assembly
Telecommunications off-hook and intrusion detection method...
Telecommunications terminal card
Teleconferencing device having acoustic transducers...
Telephone
Telephone accessory for generating conversation utterances...
Telephone accessory housing
Telephone adapter and telephone system providing multiple...
Telephone amplifier with switchable gain control
Telephone apparatus
Telephone apparatus
Telephone apparatus comprising monitoring means
Telephone apparatus for stabilizing call in no power...
Telephone apparatus with call transfer function and with improve
Telephone apparatus, information processing apparatus and inform