Digital telephone control interface system
Digital telephone set capable of being simultaneously used by a
Digital telephone system with terminals connected to a digital e
Electret microphone transmitter for use in telephone circuits
Electronic headset telephone
Electronic telephone set with low power hook switch
Electronic telephone terminal having noise suppression function
Electronic voice circuit configuration
End-user control of audio delivery endpoint in a multimedia...
Enhancement of sound quality for computer telephony systems
Fully-integrated telephone unit
Hierarchical menu screen interface for displaying and accessing
Input-output balanced filter
Input-output balanced filter
Input/output circuit for a communication device
Latching relay drive circuit for use in telephone sets
Low power dialer
Menu level indicator for a telephone terminal
Method and an arrangement for controlling the operating mode of
Method and apparatus for a host-based personal computer speakerp