MICRON/A-LAW CHOOSING METHOD AND CIRCUIT OF DIGITAL TELEPHONE SYSTEMS

摘要

A digital telephone (20) is connected to a private switching system (10), the connection being made through a transmitting section (21) of the digital telephone (20). The transmitting section (21) is connected to a microprocessor (22) which is connected to a hook-on/off detecting section (24). The output port of the microprocessor (22) is connected to a mu-law selecting terminal of a component (23) of the digital telephone (20). Thus mu-law can be automatically selected.