Capability negotiation in a telecommunications network

摘要

The invention refers to negotiating protocol options between network nodes in a telecommunications network using separated call control and bearer control protocols, the method comprising transmitting a first call control message from a first node to a second node specifying protocol options supported by the first node, transmitting a second call control message from the second node to a third node specifying protocol options supported by the first and second nodes, and selecting a protocol option from the protocol options specified in the second control message; the invention further refers to a telecommunications system for negotiating the protocol options and to an apparatus for setting up call connections.