Abstract: According to an aspect of the present disclosure, a method is disclosed for a SIPIMR node to withdraw from a SIP session set-up loop by replying a redirect message to the SIP Invite sending node. The redirect message contains information for setting up alternative SIP session, said information being available in the SIP Invite receiving node. This information is usable by the SIPIMS node for establishing an alternative SIP session as well as information needed by other nodes and applications further on in the SIP session set-up loop. The SIPIMS node is specially adapted to retrieve the information from the redirect message for establishing a new SIP session based on and containing the information from the redirect message. Several implementations are given for use in an IP Multimedia Subsystem of a telecommunication network.

Abstract: According to an aspect of the present disclosure, a method is disclosed for a SIPIMR node to withdraw from a SIP session set-up loop by replying a redirect message to the SIP Invite sending node. The redirect message contains information for setting up alternative SIP session, said information being available in the SIP Invite receiving node. This information is usable by the SIPIMS node for establishing an alternative SIP session as well as information needed by other nodes and applications further on in the SIP session set-up loop. The SIPIMS node is specially adapted to retrieve the information from the redirect message for establishing a new SIP session based on and containing the information from the redirect message. Several implementations are given for use in an IP Multimedia Subsystem of a telecommunication network.

Abstract: Means and methodology for a SIP Invite receiving node to withdraw from the SIP session set-up loop by replying a redirect message to the SIP Invite sending node. The redirect message contains information for setting up alternative SIP session, said information being available in the SIP Invite receiving node. This information is needed by the SIP invite sending node for establishing an alternative SIP session as well as information needed by other nodes and applications further on in the SIP session set-up loop. The SIP Invite sending node is specially adapted to retrieve the information from the redirect message for establishing a new SIP session based on and containing the information from the redirect message. Several implementations are given for use in an IP Multimedia Subsystem of a telecommunication network.

Abstract: A telecommunication system for transferring telephone calls and/or data between a first terminal and at least one second terminal, comprising: a telecommunication network for the transfer of the telephone calls and/or the data; an Intelligent Network (IN) control unit, coupled to the telecommunication network for providing Intelligent Network services in the telecommunication network; and a message server unit, coupled to the telecommunication network for receiving a first message from one of the terminals and for sending a second message to at least one of the terminals. The IN control unit is adapted to send the first message to the message server unit and/or to receive the second message from the message server unit. The invention further relates to a method for transferring information in such telecommunication system, from the IN control unit to at least one of the terminals and vice versa, and the invention relates to the use of the first and the second message in such telecommunication system.