| 摘要 |
A method of routing calls in a telecommunication system comprising a mobile communication system comprising at least one mobile services switching centre and at least one base station connected thereto, and mobile stations wherefrom a telecommunication connection is established to the mobile services switching centre through the base station by using a first predetermined signalling protocol on a radio connection. The telecommunication system further comprises a packet data network wherein data to be transmitted is transmitted in data packets, according to a protocol specified for the packet data network, a server communicating with the mobile services switching centre and the packet data network, wherefrom a telecommunication connection is established through the packet data network and the server to the mobile switching centre. In the server, messages according to the first signalling protocol supplied from the mobile services switching centre are as such arranged into data packets according to the packet data network protocol to be forwarded through the packet data network to the terminal. Furthermore in the server, messages according to the first signalling protocol arranged as such in the data packets according to the packet data network protocol and supplied from the packet data network are decompressed to be forwarded to the mobile switching centre. The terminal transmits and receives the messages according to the first signalling protocol arranged as such into the data packets according to the packet data network protocol and emulates a mobile station using the first signalling protocol.
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