A method for controlling the handover of a DECT portable part from a first DECT fixed part to a second DECT fixed part during provision of a data service, both fixed parts communicating with a GSM mobile switch center, the method comprising the first fixed part detecting that the handover has been requested,...http://www.google.co.uk/patents/US6278880?utm_source=gb-gplus-sharePatent US6278880 - DECT/GSM external handover
