| 摘要 |
<p>A user terminal (1) is connected to the Internet (7) through a telephone network (3, 4, 5) and a Network Access Server (6) operated by an Internet Service Provider (ISP). A protocol converter (8) exists between the telephone network (3, 4, 5) and the Network Access Server (6), and the converter (8) and Network Access Server (6) are coupled through a telecommunication link (9). User data is sent between the converter (8) and the Network Access Server (6) using a circuit switched protocol. Charging data is sent to the converter (8) from a RADIUS server (11) operated by the ISP using Internet Protocol (IP). In response to receipt of this charging data, charging messages are sent from the converter (8) to a billing system (3) of the telecommunications network. On the basis of these messages, the operator of the telecommunications network is able to bill the user for the used ISP services.</p> |
