An integrated radio telecommunications network which integrates an ANSI-41 circuit switched network and a General Packet Radio Service (GPRS) packet data network to support a mobile station which operates in both the ANSI-41 network and the GPRS network. An interworking function interfaces a mobile switching...http://www.google.com.tw/patents/US6389008?utm_source=gb-gplus-share專利 US6389008 - Integrated radio telecommunications network and method of interworking an ANSI-41 network and the general packet radio service (GPRS)
