Making voice calls in a data network

摘要

A method of completing a voice call from a telecommunications terminal 7 in a switched telecommunications network is described in which a call is redirected from a target telecommunications terminal 3 to a call management server 9. The identification of the voice call is transmitted to a user operable terminal 1 over a data network. A request for a voice session to be set up over the data network is generated and transmitted to a voice over data server 10. Within the voice over data server a voice over data channel is reserved and the call is completed be redirecting the call to the voice over data server and opening the reserved voice over data channel to the user operable terminal. The data network may be the internet. Arrangements for setting up a voice call via the internet, the transmission of advertisements and setting a voice call to a call centre are also disclosed.