Abstract: A call is originated from a mobile station being served by a visited mobile switching center (MSC) and associated with a particular MSC as a home MSC. A base station subsystem (BSS) connected to the visited MSC dynamically establishes an A-interface with an application module within the home MSC transparently through the visited MSC. Thereinafter, all subscriber transmitted data are routed from the serving BSS to the home MSC. The application module within the home MSC then processes the data to provide mobile service to the mobile station.

Abstract: The present invention provides a method and apparatus for selectively restricting only forwarded calls. Upon realizing that an incoming call was incorrectly forwarded, the terminal receiving the incoming call transmits to a telecommunications exchange an indication requesting activation of a subscriber feature that will restrict only forwarded calls from the terminal forwarding the call. The directory number for the terminal forwarding the call is retrieved from a register. That retrieved directory number is correlated with the directory number representing the terminal incorrectly receiving the forwarded call and the correlated data is stored at a database. Upon the receipt of the next incoming call, the telecommunications exchange determines that the call is forwarded. Then, the directory number associated with the forwarding party is compared against the data previously correlated and stored in the database.

Abstract: Whenever a roaming mobile subscriber's preferred long distance carrier is not ascertainable by a visited Public Land Mobile Network (PLMN), instead of utilizing a default long distance carrier selected by the visited PLMN, the serving mobile switching center (MSC) analyzes the received International Mobile Subscriber Identity (IMSI) number to determine the home network provider or PLMN associated with the roaming mobile subscriber. Using the determined home network provider data, the serving MSC retrieves the correlated home PLMN preferred long distance carrier data from its associated register. A long distance carrier specified by the retrieved data is then utilized by the serving MSC to serve all long distance calls originated from and forwarded by the roaming mobile station.

Abstract: A call forwarding activation request is transmitted from a mobile station to the serving mobile switching center (MSC) over a data channel incapable of carrying voice data. However, mobile subscribers and mobile service providers would like to establish a speech connection between the mobile station and the forward-to-number to ensure that the forward-to-number has been dialed correctly and that desired parties are at the other end. Accordingly, whenever a call forwarding activation request is received by the mobile station, the mobile station itself initiates an outgoing call setup toward the forward-to-number. The connection-less signal encapsulating the activation request is transmitted to the serving MSC only after the successful completion of such call setup. After receiving the transmitted connection-less signal, the serving HLR alters the call forwarding feature status to active.

Abstract: A mobile subscriber enters a service code followed by a called party number. An application module associated with a mobile station stores the received called party number at an attached Subscriber Identity Module (SIM) card. After determining that the mobile station has traveled into the designated home zone, the application module retrieves the stored called party number and automatically originates an outgoing call towards the called party number. By waiting until the mobile station has entered the home zone, the resulting call connection avoids additional air time charges.

Abstract: A system and method for selectively restricting wireless ciphering communications within a telecommunications system is disclosed. A ciphering database contains flags corresponding to the ciphering restrictions on particular geographical areas. After consulting the particular flag for an area, a ciphering mode is determined either restricting ciphering or allowing it within that geographical or geopolitical area.