| 摘要 |
An extra communication service system is disclosed, in which the area of the called party is provided with an extra service according to a set time while correcting the time differential with the area of the called party. The subscriber can enjoy various extra services in accordance with the time based on the standard time of the destination area. When registering the position of a mobile station 1-5 in a visitor mobile service switching center 1-4, a gateway location register 1-3 requests a home location register 1-2 to read the subscriber data of the mobile station. The home location register 1-2 determines the time differential from the common carrier number information or the like of the gateway location register, produces a roaming time table with the time differential corrected from the time set in an original time table 1-7 for the extra services, and transmits it to the gateway location register. The communication network provides the extra service in accordance with the roaming time table.
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