摘要 |
<p>The roaming service system comprises an international roaming gateway system (300) connected between a CDMA system (100) and a GSM system (200) providing a roaming service in the CDMA service area for a GSM subscriber having a GSM SIM card installed in his CDMA terminal (150). Methods using the roaming service system are provided to enable a roaming GSM subscriber to register the location , to originate and receive calls and to send and receiving short messages (SMS) in the CDMA service area. Futhermore an authentication center (260) is connected to a GSM network (210) to authenticate GSM terminals (250) and roaming GSM subscribers each having a GSM SIM card installed in their CDMA terminals (150). The CDMA system (100) supports either the international mobile subscriber identity (IMSI) stored in the GSM SIM card or a temporary mobile identity (TMIN) to register the location of the roaming GSM service subscriber.</p> |