| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for providing roaming in communication services. SOLUTION: A universal main station UMS of this invention that is plugged into other jacks than its home jack establishes a connection to a home server, which receives a mobile identification number sent from the UMS. In the case that the telephone number of an owner of the jack is not automatically transferred by way of an incoming calling line identifier(ICLID), a user of the UMS is prompted by the server to provide its directory. Then the server informs a home wired exchange about the transfer of all incoming calls addressed to the telephone number of the UMS to the telephone number of a possessor of the jack into which the UMS is plugged. When an MS is not plugged into a jack, the UMS automatically acts like a wireless MS.
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