A method of controlling the establishment of a packet switched bearer or
bearers for carrying multimedia information between two or more user
terminals during a circuit switched voice call, the method comprising at
setup of or during the voice call, predicting at one of the user
terminals the likelihood that multimedia information will be exchanged
between the user terminals during the voice call based upon properties
stored at that terminal for the or each other user or user terminal, and
automatically establishing said bearer or not, based upon the prediction.