| 摘要 |
A gateway can be provided between digital signal transmission networks where one of the networks is a private telecommunication network offering a GSM mobile telephone service using a GSM digital transmission protocol and the other network is the Internet. An internetwork gateway for setting up a call between a GSM, UMTS, PCS or Bluetooth first mobile telephone terminal connected to the private telecommunication network and another terminal which belongs to another network, can be addressed by means of an Internet address and is adapted to send and receive RTP/IP voice and/or UDP/IP or TCP/IP data, includes transcoders for transcoding information from the digital transmission protocol used in the first terminal to the protocol used in the second terminal and vice versa.
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