What is a single-mode fiber pigtail? A single-mode fiber pigtail is actually a single-mode fiber pigtail. So what is pigtail?

Pigtails are divided into single-mode pigtails and multi-mode pigtails. The single-mode pigtail is yellow, and there are two wavelengths, 1310nm and 1550nm, with transmission distances of 10km and 40km, respectively. The multimode pigtail is orange, with a wavelength of 850nm and a transmission distance of 500m for short-distance interconnection.

Pigtail, also known as pigtail, has only one end with a connector, and the other end is a broken end of a fiber optic cable core. It is connected to other fiber optic cable cores by welding. It often appears in fiber optic terminal boxes. (couplers, jumpers, etc. are also used between them).

The function of the pigtail is mainly used to connect the connectors at both ends of the optical fiber. One end of the pigtail is spliced with the optical fiber connector, and the other end is connected to the optical fiber transceiver or optical fiber module through a special connector (ST, SC, LC, MTRJ) to form optical data transmission. path. Among them, the ST connector is generally connected with a coupler first, and then connected to the fiber optic transceiver or fiber optic module.

There is a problem with the network cable, which will cause the local area network and the Internet to be unable to access normally

The local connection is related to the interconnection of the local area network and the problem of the local connection to the Internet. If there is a problem with the local connection, both the local area network and the Internet will not be accessible. Then, the following editor will introduce the reasons and solutions for the network cable not plugged in properly.

There are various problems with the local connection, one of which is the prompt "The network cable is not plugged in", and you may also encounter this situation. In the case of "plugged in", in short, the connection will be connected for a while, and it will not be connected again for a while, and there will always be intermittent network connection status, making the network abnormal.

From the literal understanding of the problem, it is mostly due to a problem with the physical connection of the network.

The network cable is not plugged in properly 1: The problem of the crystal head

If there is a problem with the crystal head, it may lead to poor contact and looseness of the crystal head connected to the motherboard. You can remove the crystal head first, and then install it. Note that you can hear a click when you install it, indicating that it is stable. If it is stable and the problem remains, then it is estimated that there is a problem with the wire in the crystal head. At this time, you have to make a new crystal head. Of course, the problem may not be entirely in the place where the crystal head is connected to the motherboard, it may be in the access switch or access router, you have to use the same method to troubleshoot.

The network cable is not plugged in properly 2: Network card driver

Don't think that only the hardware has problems, the software drivers will also have problems. You can troubleshoot whether it is a driver problem by the following methods. Right-click My Computer, find "Manage", and a dialog box pops up. In the dialog box, find "Device Manager", then look in the list to the right of it, select "Network Adapters", and see if its icon is a yellow question mark. If it is, it means that the driver has not been installed correctly. At this time, you have to reinstall the network card driver to solve the problem.

The network cable is not plugged in properly 3: There is a problem with the router

There is a problem with the router. If it is a soft setting, please check whether the use of a certain ip has been set in the router. After resetting, restart the router. Also, there is a small hole on the router, you use a wire or a thin object, insert it and wipe it continuously, the router will reset and start, or it may solve the problem. Of course, if it is a hardware problem of the router itself, you have to replace the router, because according to some netizens, after the router is struck by lightning, the local connection will show a prompt of "the network cable is not plugged in properly".

The network cable is not plugged in properly 4: The problem of the wireless network

If your network uses a wireless network, then the problem may be the router. The reason may be whether the routing itself is faulty, and at the same time, whether there is signal interference nearby.

The network cable is not plugged in five: don't forget the ARP virus

If you encounter an ARP virus in your computer, this will also happen. You can use anti-virus software to check and kill the local virus and see if it can eliminate the problem. Or, turn on 360ARP Firewall and let it provide firewall function for your network to protect your network.

The network cable is not plugged in. Six: IP setting or acquisition

Originally, the machine has an IP set, but the local connection cannot use the IP, and it will be in the state of obtaining the network address for a long time, and the prompt in this article may appear. In this regard, you have to first make sure that the IP settings are correct, in addition, you can also disable the local connection first, and then enable it, it may solve this kind of problem.