Philips Electronics
Programmable multi-tone telephone ringer
Philips Electronics
Caller-ID on Call Waiting (CIDCW) receiver
Philips Electronics
DTMF/modem/musical-tone generators
Philips Electronics
DTMF/modem/musical-tone generators
Philips Electronics
8-bit microcontroller with DTMF generator
Philips Electronics
DTMF/modem/musical-tone generators
Philips Electronics
8-bit microcontrollers with DTMF generator and 128 bytes EEPROM
Philips Electronics
8-bit microcontrollers with DTMF generator and 128 bytes EEPROM
Philips Electronics
DTMF/modem/musical-tone generators
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