| 摘要 |
A method for transmitting a call parameter, such as the identifier (A#) of an A subscriber, to a first switching centre (GMSC) from a second switching centre (VMSC) serving the terminal (MS) of an A subscriber, when both switching centres (GMSC, VMSC) are connected to an intelligent network service control point (SCP). The second switching centre (VMSC) receives from the A subscriber a call set-up request (2) to set up a call through the first switching centre (GMSC). The second switching centre (VMSC) transmits to the service control point (SCP) an intelligent network service initiation message (4) which contains the call parameter (A#). The service control point saves (6) into its memory the call parameter (A#) to wait for a second intelligent network service initiation message (12) associated with the same call. The second switching centre (VMSC) routes (10) the call to the first switching centre (GMSC). The first switching centre (GMSC) transmits to the service control point (SCP) a second intelligent network service initiation request (12). The service control point (SCP) retrieves from its memory (14) the call parameter (A#) and transmits (16) it to the first switching centre (GMSC).
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