Patent ID: 8744517

Claim:
A mobile terminal, comprising a central processor, a fixed network access control module, a dual-tone multi-frequency processing module, a call processing module, a mobile communication module and an electronic switch module, wherein the fixed network access control module connected to the central processor comprises an analog user line interface, configured to connect the mobile terminal with an analog user line and notify the central processor that the mobile terminal is connected with a fixed telephone network in a situation where the analog user line is connected to the analog user line interface; the dual-tone multi-frequency processing module connected to the central processor is configured to identify a selecting signal from the analog user line, send the selecting signal to the central processor and send a selecting signal from the central processor to the analog user line; the call processing module is configured to extract a voice signal on the analog user line, send the voice signal to an audio output device of the mobile terminal for playing and send a voice signal from a user to the analog user line; the mobile communication module is configured to achieve communication between the mobile terminal and an exterior based on a wireless network; the central processor is configured to process a signaling from the dual-tone multi-frequency processing module, and send a signaling which needs to pass through a user line to the dual-tone multi-frequency processing module, and control the electronic switch module to close a radio frequency function of the mobile communication module in a situation where the fixed network access control module notifies that the mobile terminal is connected with the fixed telephone network.