Patent ID: 6694375
Filing Date: 2004-02-17
Classification: H04L

Abstract:
A method of operating a communications network, comprising;a) for each of a plurality of users of the network, storing user profile data in a directory, which is accessible to other users of the network, the user profile data including identifiers for one or more of a plurality of different call control protocols, wherein at least one of the identifiers is for a call control protocol which is designated as being non-persistent; b) prior to establishing a call from a calling party to a called party, determining if the called party is logged into the network and if so making available to the calling party all of said identifiers whereas if the called party is not determined to be logged into the network, making available to the calling party all of the identifiers except the at least one identifier designated as being non-per-sistent; and c) subsequently establishing the call using a call control protocol by the identifier or identifiers made available to the calling party in step b).