Philips Electronics
Versatile speech/dialler/ringer with music-on-hold
Unisonic Technologies
LOW VOLTAGE TELEPHONE TRANSMISSION CIRCUIT WITH DIALLER INTERFACE
Unspecified
TELEFUNK ELECTRONIC CREATIVE TECHNOLOGIEN U2200B-FP
Philips Electronics
Listening-in circuit for line-powered telephone sets
Unspecified
VERSATILE TELEPHONE TRANSMISSION CIRCUITS WITH DIALLER INTERFACE
Philips Electronics
Versatile telephone transmission circuit with dialler interface
Philips Electronics
Hands free IC
Philips Electronics
Speech and handsfree IC with auxiliary inputs/outputs and analog multiplexer
Philips Electronics
Speech and handsfree IC
Temic Semiconductors
Zero Voltage Switch with Fixed Ramp
Philips Electronics
Low voltage transmission circuits with dialler interface
Philips Electronics
Low voltage versatile telephone transmission circuit with dialler interface
