Self-diagnostic method of radio portable device

Details Self-diagnostic method of radio portable device Self-diagnostic method of radio portable device

1995-10-03

1998-12-01

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at separate stations

455 671, H04B 700

Patent

active

058451943

ABSTRACT:
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.

REFERENCES:
patent: 5392348 (1995-02-01), Park et al.
patent: 5469494 (1995-11-01), Ortiz Perez et al.
patent: 5619564 (1997-04-01), Canniff et al.

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