Method and apparatus for establishing a voice bearer in a telecommunications system

摘要

A method for establishing a voice bearer in a telecommunications system in which packetized voice traffic is carried over a user plane, includes negotiating at least one of header compression and voice multiplexing options for a call (13) and, in the negotiation process, using information about the options that is not sent over the user plane during transmission of voice traffic over the user plane. The information may be sent by signaling out of band and not via the user plane, thus not impacting on transmission of voices data. In another method, option information from a previous call or calls between the same IP addresses (15) is used to set up the options for a new call without any additional signaling (16).