Patent ID: 6898426

Claim:
A mobile phone terminal that converts transmission speech into a digital speech signal by an A/D converter, encodes the digital speech signal by a speech coder/decoder, and transmits the code sequence via a radio interface and an antenna, and that supplies a received signal received by the antenna to the speech coder/decoder via the radio interface, and converts a digital speech signal output from the speech coder/decoder into an analog electric signal by a D/A converter, said mobile phone terminal comprising: a general purpose connection port usable for connecting an external device to said mobile phone terminal; and a first signal path switch interposed between the speech coder/decoder and the A/D converter and D/A converter to enable a terminal acoustic evaluation signal to be input and output through a path different from that in a normal operation mode of the mobile phone terminal, wherein the terminal acoustic evaluation signal and a control signal of said first signal path switch are input and output through said first signal path switch and said general purpose connection port.