| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and apparatus for restricting call terminations, when a mobile unit is roaming. SOLUTION: This invention provides the method and apparatus for restricting call terminations to a roaming mobile unit. A serving MSC(mobile switching center) that is an MSC to provide call processing to a mobile unit which is not a home MSC among mobile units, sends a registration notification request to the home location register(HLR). The HLR retrieves the termination access code parameter from itself and sends the parameter to the serving MSC. The termination access code parameter includes a value that indicates if the mobile unit is allowed to accept roamer port calls. A VLR(visitor location register) associated with the serving MSC stores the parameter. When a call request comes in the serving MSC and requests a roamer port call with the mobile unit, the serving MSC checks the value of the termination restriction code to determine if the roamer port call should terminate, or complete, the call.
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