Abstract: A method of establishing a communications session for communication of data with respect to a telephony user device and at least one other user device in a data communications network. Communications are conducted with a server system. The communications comprise a client-server connection. Call party details of a telephone call are transmitted to the server system in the communications. The telephone call involves at least the telephony user device, as a first telephony user device involved in the call, and a second telephony user device involved in the call. The call party details including a first identity associated with the first telephony user device and a second identity associated with the second telephony user device.

Abstract: A method of establishing a communications session for data with respect to at least two user devices in a packet switched communications network in parallel to a voice session via a circuit switched network. Call party details of a telephony call are received. The telephony call involves at least a first telephony user device and a second telephony user device. The call party details include a first identity associated with the first telephony user device and a second identity associated with the second telephony user device. A separate communications session is established on the basis of the first and second identities received in the call party details and depending on the capabilities of the user devices. The communications session is separate from the telephone call, for the communication of data to and/or from at least two user devices.

Abstract: A method of establishing a communications session for communication of data with respect to at least two user devices in a data communications network. A client-server connection request is received from at least one of the at least two user devices. Call party details of a telephone call are received. The telephone call involves at least a first telephony user device and a second telephony user device. The call party details include a first identity associated with the first telephony user device and a second identity associated with the second telephony user device. At least one of the first and second identities comprises a telephone dialling number. A separate communications session is established on the basis of the first and second identities received in the call party details.

Abstract: A method of establishing a communications session for communication of data with respect to at least two user devices in a data communications network. Call party details of a telephone call are received. The telephone call involves at least a first telephony user device and a second telephony user device. The call party details include a first identity associated with the first telephony user device and a second identity associated with the second telephony user device. At least one of the first and second identities comprises a telephone dialling number. A separate communications session is established on the basis of the first and second identities received in the call party details. The communications session is separate from the telephone call, for the communication of data to and/or from the at least two user devices.

Abstract: A method of processing data in relation to a teleconference service in a telecommunications network is provided. The teleconference service is able to handle a multi-party teleconference for three or more teleconference participants. First, second and third teleconference participation identifiers are received from first, second and third teleconference participants respectively. The first, second and third teleconference participation identifiers are correlated to determine that the first, second and third teleconference participants are participants in a given multi-party teleconference. Data is transmitted for enabling the establishment of a data communications session which is established separately from the teleconference.