Method and device for transmitting voice signal based on interconnected network and mobile communication network

This invention relates to a method and a device for transmitting voice signals based on Internet and a mobile communication network, in which said device includes a VOIP gateway, a radio transceiving and treating unit, an instruction interface realizing mutual communication between said unit and a central process unit of the VOIP gateway and a coding-decoding unit realizing voice modulus conversion, said method includes the following steps: the VOIP gateway receiving or transmitting a VOIP signaling message at the side of the internet, the radio transceiving and treating unit sending or receiving a radio calling signaling at the side of the mobile communication network, establishing an end-to-end call and transmitting the voice. By using the invention, the already mature network and globe mobile communication network in the prior business and technology is fully used to fast realize the global VOIP communication in a low input manner, thereby reducing the communication cost of the whole society, improving the