Beefchicken Industries

American Telecommunications Corp TonePulse Converter

PCB Photos

Power Supply & Line Interface

Logic #1

Logic #2

Tone Detector

Component Information

Amphenol Plug/Socket

Schematic

The following is a schematic for the 204 series TonePulse converter, but from what I can tell, at the level of detail provided in this schematic, it's functionally identical to the 104. The 204 seems to be an optimization of the 104 design.