| 摘要 |
PURPOSE: A remote additional service unit of mobile communication line switching system is provided to control additional service, which mobile communication switching system provides to each unit, from public switched telephone network. CONSTITUTION: A remote additional service unit of mobile communication line switching system alters and registers the altered additional service at a home location registration part, when a mobile unit wants to alter additional service, by connecting to the concerning station through the following parts: a repeating line controlling part that controls repeating line match between a particular station and the station from the mobile communication switching system; a particular unit creating tool that chooses the alteration of additional service of a mobile unit.
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