A system and method of restricting an on-going call of a fixed subscriber to a fixed subscription area (FSA) in a cellular telecommunication system having a plurality of cells and a plurality of subscribers. The plurality of subscribers includes at least one fixed subscriber assigned to the FSA and engaged...http://www.google.se/patents/US6073010?utm_source=gb-gplus-sharePatent US6073010 - System and method for restricting mobility of subscribers assigned to fixed subscription areas in a cellular telecommunications network
