Fujitsu Corporation

Michihiro Hamada

Shigehiko Yazawa

Yoshiaki Inoue

Yutaka Suzuki

A digital telephone set includes a digital telephone circuit and an emergency analog circuit. Normally, the digital telephone circuit is made active so that a handset provided in common therewith is connected to a digital transmission line. In an emergency, the emergency analog circuit is made active instead of the digital telephone circuit so that the handset is connected to an analog transmission line. A dial key pad unit and a speaker are provided in common with the digital telephone circuit and the emergency analog circuit.

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Yokohama, Japan

Michihiro Hamada