IP地址控件演示程序，可实现IP地址的输入，可阻挡错误IP地址的输入-IP address control demonstration, which enables the IP address input, could stop the wrong IP address input

目前，包括我国在内的许多国家都采用了H.323作为IP电话网关之间的协议，整个IP电话系统只是把IP网络作为传输媒介，在用户的接入上还是采用电路交换系统，把IP电话网关作为电路交换网和IP网络的接口。-Currently, including China, many countries had adopted H.323 IP telephony gateway as the agreement between the the entire IP phone system is to bring

91vpn代理软件将电脑的ip代理到别的地方-91vpn agent software computer ip proxy to another place