1. First, make sure that the power supply of the mobile wifi jammer is normal, and the network cable connected to the jammer is in good condition;
2. Connect the jammer and the notebook directly with a network cable, and then ping the IP address of the jammer. If it is unsuccessful, you need to judge whether the IP address of the jammer is wrong, or restore the IP address of the jammer to the factory settings;
3. Confirm whether the MAC address of the jammer is legal;
4. Confirm whether the server and the mobile phone signal jammer are in the same network segment;
5. Avoid the switch, and then use a separate small switch to access the server;
If the above operations still cannot be solved, you need to contact the supplier of the mobile phone signal jammer.