Patent ID: 7263354

Claim:
A telecommunications system for providing a wireless service between a mobile device of a wireless access network using CDMA technology and a wireless core network using GSM technology, the system comprising: a radio access network in the wireless access network for receiving a first message from the mobile device, wherein the radio access network uses CDMA technology; the wireless core network accessible to the radio access network; a first means for converting the received first message from CDMA technology to GSM technology, so that the wireless core network is accessible to the mobile device, said first means including a processor; a memory accessible to the processors; and a plurality of instructions stored in the memory for processing by the processor, the instructions for; identifying a second message, wherein the second message is based on GMS technology and corresponds to the first message; adding information associated with GSM technology to the first message if a comparison between the first and second messages indicates that additional information is needed to make the first message compatible with the GMS technology; and removing information associated with CDMA technology from the first message if the comparison between the first and second messages indicates that information should be removed to make the first message compatible with the GSM technology.