Patent ID: 7096023

Claim:
A method in a telecommunications system, the telecommunication system comprising at least a first telecommunication network and a second telecommunications network and providing at least one supplementary telecommunications service for a first station, the method comprising the steps of: initiating a set-up procedure for communications between the first station and a second station via said telecommunication system, wherein the first station initiates the communication with the second station; sending an enquiry to a number portability service, said number portability service facilitating porting of stations from the first telecommunications network to the second telecommunications network so that the number or address of the ported stations remains the same; determining if the second station is a ported station; and informing at least one supplementary telecommunications service of the results of said determination during a phase that is before a phase in which the set-up procedure is completed and before provision of said at least one supplementary telecommunication service for said first station is initiated.