| 摘要 |
Method for setting up calls in a mobile telephone network, mobile telephone exchange and visitor register in a mobile telephone network, comprising at least one mobile telephone exchange MSC, 414, a first visitor register VLR1, 415 and a home register HLR, 412, by means of which method during the setting up of a call to a calling subscriber A, the mobile telephone exchange MSC, 414 sends a message with a request to the caller A concerning the telephone number of the called B subscriber, the calling A subscriber sends the telephone number of the called B subscriber to the mobile telephone exchange MSC, 414, the mobile telephone exchange MSC, 414 connects a communication channel from the calling A subscriber to the mobile telephone exchange MSC, 414. In order for the route data of the called subscriber not to be requested unnecessarily from the home register HLR, by means of a subscriber data request message 202 the mobile telephone exchange MSC, 414 asks the first visitor register VLR1, 415 to send the called B subscriber's subscriber data to the mobile telephone exchange MSC, 414, the first visitor register VLR1, 415 looks up the called B subscriber's subscriber data in its subscriber database 414, the first visitor register VLR1, 415 sends an acknowledgement message 203 for the subscriber data request message to the mobile telephone exchange MSC, 414. <IMAGE>
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