| 摘要 |
PROBLEM TO BE SOLVED: To more surely confirm account in an Internet connection and a personal communication service by the way of dial-up. SOLUTION: A user side terminal 11a operates dialing to an access point at a service provider side. A called telephone number is communicated to a host computer 16. Also, when a line is connected, a user ID and a password are transmitted to the host computer 16. In the host computer 16, the user ID and the password are confirmed in the same way at the time of normal connection, and the called telephone number is checked without starting the service provision, and when they are matched with each other, the connection is authenticated, and each kind of service provision is started.
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