Description
This circuit is laid out on a large and partitioned PCB making it ideal as a training board in understanding the building blocks which make up a telephone handset. The dialing mode may be changed between DTMF and Pulse in order to suit either the modern dialing systems or the older decadic dialing system.
Specifications:
Power Supply: Powered from the telephone line
PCB Dimensions: 124.7 mm X 102.8 mm X 18 mm (4.91 X 4.05 X 0.7 in.)
