Patent 7567663 was granted and assigned to Siemens Aktiengesellschaft on July, 2009 by the United States Patent and Trademark Office.
A telephone call processing method comprising the steps of: (i) receiving a telephone call for transfer to a first telephone number; (ii) determining whether the first telephone number has been set to divert calls to a second telephone number; and (iii) processing the call in dependence upon the determination of step (ii).