ip通过输入ip及端口拨打电话首先打开监听端让别人可以连接，接着可以拨号-ipphoneip通过输入ip及端口拨打电话首先打开监听端让别人可以连接，接着可以拨号 ip by entering the ip and port call first open-ended so that others can be connected to monitor, then you can dial-up