Patent ID: 8214512

Claim:
A Control Entity for setting up a session in a communications network, comprising an input device for receiving a request to set up a session in the communications network; a processor unit for processing the request; and an output device for sending messages; wherein the Control Entity further comprises or has access to a memory for storing information; wherein the processor unit is arranged to: determine if the request comprises a valid Communication Service Identifier (CSI), the CSI identifying the type of communication service of the session that is to be established over the communications network; and if the request does not comprise a valid CSI, execute a default CSI procedure using default CSI information stored in the memory, said default CSI information being based upon subscription information; wherein, for carrying out said default CSI procedure, said processor unit configured to: add a default CSI to the request, in case the request does not comprise a CSI, where the default CSI is specified by the default CSI information; or test at least one parameter in the request and decide based on the at least one tested parameter and the default CSI information to add a default CSI to the request, where the default CSI is specified by the default CSI information, or not to add a default CSI to the request.