Self-diagnostic method of radio portable device

摘要

Disclosed is a constitution for repeated self-diagnosis of a radio portable device having a two-way radio device alone, in a wireless communication system using DTMF control. By the instruction from the operation unit, output signals of a transmission sound circuit and a transmission DTMF circuit are repeatedly received in a reception sound circuit and a reception DTMF circuit, and the output from the speaker is inspected, thereby diagnosing the circuits.