Saturating bipolar switch circuit for telephone dial pulsing
Security code selector for telephone access card
Self-compensated dual tone multiple frequency generator
Self-lighting type push button input device
Semiconductor integrated circuit for a telephone dialer includin
Service use device
Shortcut dialing apparatus for telephone set
Shutter mechanism for telephone directory
Small electronic apparatus
Smart directory management
Smart phonebook search
Sound generation circuit
Speech activated telephone
Speech recognition adapter for telephone system
Speed dialing method using symbols in communication terminal...
Speed dialling method for a telephone unit
Station set directory assistance arrangement
Subscriber set programming module
Successive key operating mechanism for telephone dialing
Support structure for a keypad