SERVICE BASED RELEASE OF A SUBSCRIBER REGISTRAR SERVER FROM A SIGNALLING PATH IN AN INTERNET PROTOCOL COMMUNICATION NETWORK.

摘要

A method of and servers for establishing a signalling path (20) for a communication session between a calling party (2) and a called party (11) in an Internet Protocol, IP, communications network. The signalling path (20) between the calling party (2) and the called party (11) is established via at least one subscriber registrar server (32) and at least one application server (30) invoking at least one service for the communication session. Dependent on the type of service, if capable for taking over control of the communication session, the at least one subscriber registrar server (32) may be at least partly released from the signalling path (20) for the at least one invoked service.