目前，很多小区上网在计费和安全认证机制上却是一大空白，没有一套完整的计费系统。
At present, it is a big blank to surf the net on accounting and safety certification mechanism in a lot of districts, and there is not a set of intact network billing system.
大型拨号认证计费服务器必须能够同时认证大量上网拨号用户，以及保存用户上网信息以计费。
A large-scale RADIUS authenticating and accounting server must be able to simultaneously authenticate a great number of users while recording their dialing information for accounting purposes.
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