Compatibility server with in-supported telephone number portability

Abstract

A method and apparatus for establishing a connection from a calling A-subscriber to a called B-subscriber in a telecommunications TC network that offers IN (=Intelligent Network) services, in particular in a multi-operator environment with IN-supported telephone number portability, is characterized in that upon determination of the target address of the called B-subscriber, a service requested for the current call by the calling A-subscriber is simultaneously compared to a stored service profile of the called B-subscriber and in the event of a determined incompatibility, a corresponding negative release message is sent to the calling A-subscriber. This permits the calling A-subscriber, before a possibly pointless connection is made to a called B-subscriber, who does not offer the services desired by the A-subscriber at all, to not even make the connection in the first place, which would be pointless for the calling A-subscriber.

Dependencies are inferred from the claim text.