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

Subscriber line circuit having an improved offhook supervision c

Subscriber line control apparatus to concurrently detect change

Subscriber line interface circuit having means for combining DC

Subscriber set programming module