| 摘要 |
The invention concerns a system, which allows speech transmission between a mobile station and terminal equipment connected to a data network. The terminal equipment, preferably an Internet telephone, sends and receives data packets in accordance with the protocol of the data network in question and is provided with telephone characteristics. It has a speech coder in accordance with the mobile station system which synthesises the original speech from the speech parameters sent by the mobile station and contained in the data packets arriving from the data network and which correspondingly produces speech parameters for location in outgoing data packets. The speech parameters are conveyed as such between the mobile station and the terminal equipment without applying any additional coding to them. When the mobile telephone network is a packet switched network, it may be connected directly to the data network or, when the mobile telephone network is a circuit switched network, a gateway is used, which performs any necessary conversions, so that the call can be connected from one network to the other.
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