Patent ID: 8019327

Claim:
A method to optimize the use of resources of a public telecommunication network during the switching of an incoming call in parallel to a plurality of end devices of a single subscriber all having a uniform calling number that form a multiple-device configuration, comprising: before a call is delivered an intelligent call control of the public telecommunications network determines in parallel the system statuses of said plurality of end devices in the multiple-device configuration being called or of identification chips connected to the end devices being called and of the switching facilities involved by polling databases of the end devices being called or the identification chips connected to the corresponding said end devices being called and mobility/profile databases assigned to the switching facilities involved; then—based on the data on the system statuses of the end devices being called or the identification chips connected to such end devices—attempting to deliver the call in parallel to some or all of the end devices such that an optimal call delivery is performed, wherein only those call attempts promising success are initiated; in the case it can be derived from the data on the system status that an end device is free to receive a call, the call is first delivered and in the case the connection is not used, the occupied line is released again to the origin of the connection; and in the case the call has not been accepted, using the previously determined statuses of the end devices being called or of the pertinent identification chips connected to the corresponding end devices, optionally a direct connection is established to a desired call forwarding target.