Patent ID: 8150390

Claim:
A method of routing a call made to a fixed telephone number of a UMA-subscriber in a telecommunication network that comprises a switching node, a location server and an intelligent network, the intelligent network comprising a service control entity, said method comprising said service control entity: storing a list associated with said UMA-subscriber, said list comprising a cell identifier (CI) of each cell overlapping a WLAN coverage area of a WLAN AP associated with said UMA-subscriber; receiving a trigger message from said switching node, said trigger message comprising said fixed number of said UMA-subscriber; receiving location information of said UMA-subscriber from said switching node or from said location server, said location information comprising a cell identifier of a cell serving said UMA-subscriber; and performing a first action if said cell identifier of said serving cell is in said list, and a second action, different from said first action, if said cell identifier of said serving cell is not in said list; wherein said first action comprises: checking if the UMA-subscriber is currently in said WLAN coverage area of said WLAN AP associated with said UMA-subscriber; and if the result of said checking is affirmative, connecting the call to said UMA-subscriber via said WLAN AP; or if the result of said checking is negative, sending a calling party making the call a message indicating that the UMA-subscriber is currently in at least one of the cells of said list but not in said WLAN coverage area.