| 摘要 |
<p>A user terminal comprising an IP Multimedia Subsystem, IMS, client for enabling the terminal to communicate with an IMS network. The IMS client comprises a conference creation and control unit for creating and controlling an IMS conference involving one or more participants, participants being identified within a conference INVITE or REFER message by respective Uniform Resource Identifiers, URIs, within a URI list, the conference creation and control unit comprising a response handling unit for receiving from said IMS network, in response to the sending of an INVITE or REFER, a SIP response message including an XML body specifying an Outgoing Communication Barring, OCB, service invocation result and for presenting the specified result to a terminal user.</p> |
