Authentication, Authorization and Accounting (AAA) protocols such as TACACS and RADIUS were initially deployed to provide dial-up PPP and terminal server access.

认证、授权和计费(AAA)协议，如TACACS和RADIUS，当初是为了对终端访问服务和PPP拨号服务实行访问控制而开发的。

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Intelligent telephone terminal is a multifunctional device that can record messages, automatically answer calls, manage personal information and connect to the Internet via dial - up line.

智能电话终端是一个集录音留言、自动应答、个人信息管理和拨号上网等功能于一身的设备。

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