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目前的虚拟拨号专用网(VPDN:virtual private dial-up network)主要是采用PSTN/ISDN承载的。结合江苏联通基于CDMA 1x的VPDN解决方案,详细描述了业务呼叫实现过程,提出了进一步的增强的安全解决方案,并给出了一个接入实例。
The current virtual private dial-up network (VPDN) is mainly carried by PSTN / ISDN. Combined with Jiangsu Unicom’s VPDN solution based on CDMA 1x, the service call implementation process is described in detail, a further enhanced security solution is proposed and an access instance is given.