| 摘要 |
<p>A method of call barring following a Proxy-Call Session Control Function receiving an SIP INVITE message from a UE, the SIP INVITE message includes an identity of a terminating endpoint. The P-CSCF compares the identity of the terminating endpoint to the identity of premium rate services stored in a memory of the P-CSCF and, if the identity of the terminating endpoint is the same as an identity of the premium rate service stored in the memory, inserting an indicator into the SIP INVITE message to produce a modified SIP INVITE message. When the modified SIP INVITE message is received at an Application Server, the Application Server determines, from a subscriber profile associated with the originating endpoint identity, if the subscriber associated with the originating endpoint identity has selected to deny connections to premium rate services. If the subscriber has selected to deny connections and an indicator is included in the SIP INVITE message then the Application Server causes the call connection requested in the SIP INVITE message to be denied. In an alternative method the Application Server receives an unmodified SIP INVITE message and determines, from a subscriber profile associated with the originating endpoint identity, if the subscriber associated with the originating endpoint identity has selected to deny connections to premium rate services. If the subscriber has selected to deny connections to premium rate services then the Application Server inserts an indicator into the SIP INVITE message to indicate that the connections are to be denied. This indicator may be used subsequently by another function to determine whether or not to deny the call connection request in the SIP INVITE message.</p> |
