Signal detector with echo cancellation
Signal detector with matched filter coefficient
Signal transmission control apparatus
Signal-processing method and system for off-hook notification
Signal-recognition arrangement using cadence tables
Small electronic apparatus
Smart directory management
Smart phonebook search
Sound generation circuit
Speakerphone with fast idle mode
Speaking apparatus having handfree conversation function
Speech activated telephone
Speech immunity enhancement in linear prediction based DTMF dete
Speech recognition adapter for telephone system
Speed dialing method using symbols in communication terminal...
Speed dialling method for a telephone unit
State machine based universal voice grade cards
Station set directory assistance arrangement
Subscriber circuit provided with a circuit for monitoring a subs
Subscriber circuit with built-in polarity switching circuit