Message handling in an ip multimedia subsystem

Claimed is a processing push message from session starting network protocol 1 advising server 3 to transmit the network user 4 method. The method comprises a state informs the starting and conclusion for session starting protocol of session server 3 rounds of signal informing session starting protocol session, session for and during carried out retarded the cross substrate-processing by user 4 part or the push the transmission of message, comprising completed is a session.