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  • 软件语言:简体中文
  • 授权方式:免费软件
  • 运行环境:PDF
  • 软件类型:国产软件/网络安全
  • 相关链接: 演示 官方
  • 收录/更新:2010-02-17/2010-02-17
  • 软件大小:133KB
  • 发布者:admin
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软件简介

Dial-on-Demand Routing (DDR) provides network connections across Public Switched Telephone
Networks (PSTNs). Dedicated wide-area networks are typically implemented on leased lines or
more modern service provider options such as Frame Relay, SMDS, or ATM. Dial-on-Demand
Routing provides session control for wide-area connectivity over circuit switched networks, which
in turn provides on-demand services and decreased network costs.
DDR can be used over synchronous serial interfaces, Integrated Services Digital Network (ISDN)
interfaces, or asynchronous serial interfaces. V.25bis and DTR dialing are used for Switched 56
CSU/DSUs, ISDN terminal adapters (TAs), or synchronous modems. Asynchronous serial lines are
available on the auxiliary port on Cisco routers and on Cisco communication servers for connections
to asynchronous modems. DDR is supported over ISDN using BRI and PRI interfaces.

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