Network Surveillance Camera: Analysis of Network Unreachable Reasons

1,086 Published by xia, Crystal Nov 06,2019

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In the past two days, there have been people in the background who have encountered network unreachability during the installation of the network surveillance camera. How to find the cause of the failure and how to solve it. Today we systematically understand this knowledge.

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There are two situations in which a network hard disk camera has a network unreachable fault:

First, the original monitoring system is normal, and then the network unreachable fault occurs;

Second, the network unreachable failure occurred during the initial installation monitoring and debugging process.

First of all, we must understand the reason why the network is unreachable. It is not necessarily a network problem. The simplest network monitoring system consists of front-end cameras, transmission lines, and back-end hard disk recorders. Each part has problems that may cause the network unreachable.

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Reason analysis and solution for the first case:

The original monitoring system was used normally, and suddenly there was no image in the middle, indicating that the network was unreachable. That should not be a configuration problem. Find out the problem from the hardware.

Solution: 1 Check the power of the surveillance camera. The normal monitoring power supply is easier than other devices. If the monitoring power supply is not properly powered, the network will be unreachable. 2 Check the crystal head of the network cable, and use the tester to check whether the crystal head is intact. When the crystal head is loose and the network is unreachable, it is enough to re-make a crystal head with the cable clamp.

Reason analysis and solution for the second case:

The initial installation and debugging encountered network unreachability, this problem may be more complicated, because in addition to hardware connection failure, it may be a conflict or error in network IP address configuration.

First of all, it is definitely checking the physical connection, that is, the network cable and the crystal head are in good communication. The initial configuration of the video recorder is normal. Now many video recorders are in the background and need to be activated first. It is definitely not necessary to activate the network.

Then mainly check the IP address of the device, the network IP address. We have mentioned in many previous articles. We need to ensure that the IP address of the network camera and the IP address of the DVR are on the same network segment and cannot be repeated. The meaning of the same network segment, such as 192.168.1.XX, the second-to-last segment of 1 can be understood as the network segment, then and are on the same network segment, and and are different network segment.

At the same time, it should be noted that each has a factory default address, so in the case of multiple cameras, you must set the IP address, try to manually set a fixed static IP address, do not automatically obtain, automatically get the drawbacks when the power is turned off and then restarted, the IP address may conflict with other devices, and the network may be unreachable.

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