3G卡能拨上号但连不上服务器

<p>3G dialing is ok but device cannot connect with server</p> <p>1.Make sure server and server ports are running normally 2.Resatrt server to try 3.Register another device to the server to check whether issue is in server side or device side 4.Check the server address/port/protocol/network settings on device. Make sure 3G antenna is connected well and signal is good. 5.Check id there is enough fee and 3G data on SIM card. Install the SIM card on mobile to check whether it is working. 6.Check APN settings on MDVR. Ask the operator for APN info, and set it on mdvr to try; Restore device to default settings and use default APN settings to try. 7.Use another SIM card of same type to try 8.Use SIM card from another operator to try 3G可以获取IP但是连接不到服务器: 根据经验，一般是由服务器异常，APN参数，或卡问题引起的。 1.排查服务器服务和端口是否正常 2.重启服务器测试【重要，确保服务器正常】 3.注册其他MDVR到服务器，确定是服务器侧问题还是设备侧问题 4.检查SIM卡是否有剩余流量和话费 5.检查调试APN参数设置。 6.换卡测试</p>