Contek Microelectronics
LOW VOLTAGE TELEPHONE TRANSMISSION CIRCUIT WITH DIALLER INTERFACE
Philips Electronics
Supply circuit with power-down for telephone set peripherals
Temic Semiconductors
Simple phase control circuit
Philips Electronics
Control circuit for switched-mode power supply
Philips Electronics
Hands-free IC
Philips Electronics
Call progress monitor for line powered telephone sets
STMicroelectronics
VIDEO AND AUDIO SIGNALS SWITCHINGS FOR THE PERI-TELEVISION PLUG
Unspecified
VERSATILE TELEPHONE TRANSMISSION CIRCUITS WITH DIALLER INTERFACE
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
