Philips Electronics
Speech and listening-in IC
Philips Electronics
Low voltage transmission circuits with dialler interface
Philips Electronics
Call progress monitor for line powered telephone sets
Philips Electronics
Low voltage versatile telephone transmission circuit with dialler interface and transmit level dynamic limiting
Philips Electronics
Listening-in circuit for line-powered telephone sets
Unisonic Technologies
LOW VOLTAGE TELEPHONE TRANSMISSION CIRCUIT WITH DIALLER INTERFACE
Philips Electronics
Hands free IC