一旦道路计费系统形成并使用，还将提供有价值的需求信息。

Once a road-pricing system was up and running, it would also provide valuable information about demand.

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华为IAD可以提供8 - 32路电话终端连接，将电话终端的信息转换成IP包，在NGN上实现软交换，并将计费信息通过RS232传给计费系统。

Huawei IAD (Integrated Access Device) provides 8-32 phone channels, transferring the information at phone terminals to IP packages to perform the soft switch and billing management system via RS232.

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