What to do if the computer cat LOS flashes red light

If the LOS light flashes red, the optical router cannot receive the optical signal

If there is a problem with the optical interface of the optical modem, you need to replace the optical modem. The indoor pigtail connection is loose. Plug the connector in and it can be restored.

The bend of the optical fiber in the indoor part is too large. Excessive bending of the optical fiber will affect the total reflection transmission of the optical signal in the optical fiber, as long as the optical fiber is straightened. If the optical fiber in the outdoor part is broken or the optical port of the equipment in the operator's equipment room is faulty, you need to contact the operator for handling.

What's going on with the LOS flashing red light on the cat?

How to fix the red LOS light by yourself?

Turn on step-by-step reading mode. How it works:

The LOS light turns red, indicating that no signal has been detected and communication with the operator's servers is not possible. To put it simply, there is a problem with the broadband in your home, it may be a problem with the optical fiber line in your home, or it may be a problem with the router and switch placed by Unicom on your floor or in the community.

Check whether the optical fiber interface plugged into the modem is loose, and if it is loose, plug it back in.

Turn off the power of the modem, wait for a few minutes, and then turn on the power and observe the color of the LOS, etc.

If none of the above methods work, then call Unicom customer service **10010, transfer to manual customer service, and report the fault. After connecting to Unicom's manual customer service, directly explain to the customer service mm that the optical modem LOS light is red and cannot access the Internet, so let them arrange maintenance personnel to come to solve the problem.

If you have a maintenance person in your area, you can also contact the maintenance person directly to report the fault. In addition, if you have installed Unicom's mobile phone business hall app, you can report broadband faults in the app.

1. LOS means loss, that is, the loss of the light source signal, in most cases, the light connector is broken, generally speaking, most of the cold connectors are used, and an optical jumper needs to be replaced, or the connector is hot-melted;

2. It may be caused by a problem with the optical fiber signal, the red light is the meaning of signal loss, indicating that the optical path is not passable, the table Chang draft indicates that the optical fiber is broken or the interface is not connected somewhere, you can re-plug it and try it, and straighten the optical fiber wire, do not have a large angle of folding, if the red light is still on, it indicates that the optical fiber may be broken, and you need to contact the maintenance personnel to repair or rewire after excluding the situation that it is not plugged in or the bending angle of the optical fiber is too large;

3. There is a square pigtail head plugged in the optical cat, which is generally blue, you can check whether the head is plugged in, and you can also check it along the leather cable connected to the head, within the range that can be seen, see if the leather fiber optic cable is broken, damaged, over-bent or knotted, the Unicom optical fiber cat LOS light should be extinguished under normal conditions, if the red light has been flashing, it means that the line is not smooth, it is recommended that you check whether your indoor line is bent, if there is no repair.

1. LOS means loss, that is, the loss of the light source signal, most of the cases are broken light connectors, generally speaking, most of the cold joints are used, and a light jumper needs to be replaced, or the joint is hot-melted;

2. It may be caused by a problem with the optical fiber signal, and the red light means that the signal is lost, indicating that the optical path is not connected, indicating that the optical fiber is broken or the interface is not connected somewhere, you can try to plug it in again, and straighten the optical fiber cable, do not fold at a large angle, if the red light is still on, it means that the optical fiber may be broken, and you need to contact the maintenance personnel for maintenance or rewiring after ruling out the situation that it is not plugged in or the bending angle of the optical fiber is too large; Silver Bad Key.

3. There is a square pigtail head plugged into the optical modem, which is generally blue, you can check whether the head is plugged in, and you can also check it along the leather cable connected to the head, within the range that can be seen, see if the leather cable is broken, damaged, over-bent or knotted, and the Unicom optical fiber cat LOS light should be off under normal conditions, if the red light has been flashing, it means that the line is not smooth, it is recommended that you check whether your indoor line is bent, if there is no repair.

What's going on with the LOS flashing red light on the cat?

If you are a light cat, as long as the cat flashes a red light, the only way is that you can only call the 10000 warranty, because this is a problem with the line! If you used the fiber before, and then the red light turned on, either the fusion joint was broken, or the fiber was broken there.

LOS light signal indicator, red light flashing: indicates that the device has not received the light signal.

Suggestions: 1. Restart the optical modem;

2. Check whether the bending angle of the line is too large;

3. Check whether the optical fiber interface is loose and plug in the joint;

If the above methods still do not solve the problem, you can call the local 10086 to report the broadband fault.

If the LOS light on the optical modem turns red or flashes, it is usually caused by the following conditions:

1] There is a problem with the optical interface of the optical modem, and the optical modem needs to be replaced.

2] The indoor pigtail connection optical cat connector is loose, and the connector can be restored by plugging it in;

3] The bending of the indoor part of the optical fiber is too large. Excessive bending of the optical fiber will affect the total reflection transmission of the optical signal in the optical fiber, as long as the optical fiber is straightened.

4] If the outdoor optical fiber is broken or the optical port of the equipment in the computer room is faulty, you need to contact the staff to report the fault.

The light is not through. There is a square pigtail head plugged into the light cat, which is usually blue. You can check if the head is plugged in, and you can check along the leather cable attached to the head to see if the cable is broken, damaged, bent or knotted.

If the above situation can be ruled out, then it can only be solved by the installation personnel.

The LOS light of China Unicom optical fiber cat should be off under normal conditions, if the red light keeps flashing, it means that the line is not smooth. It is recommended that you first check whether there is a bend in your indoor line, if not, you can directly call Unicom **10010 for repair.

What's going on with the LOS flashing red light on the cat?

If the LOS light flashes red, it is preliminarily judged that the modem cannot receive the light signal or is too weak, you can follow the steps below to check further:

1. Please check whether the connection between the yellow pigtail and the optical cat is loose;

2. If there is any looseness, please reconnect it manually and restart the modem;

3. If the "LOS" light indicator continues to flash, please report the fault.

The reason for this failure is that the optical fiber is broken or the optical attenuation is too large, and the optical modem is not certified.

If the LOS light on the optical modem turns red or flashes, it is generally faulty, as follows:

1] There is a problem with the optical interface of the optical modem, and the optical modem needs to be replaced.

2] The indoor pigtail connection optical cat connector is loose, and the connector can be restored by plugging it in;

3] The bending of the indoor part of the optical fiber is too large. Excessive bending of the optical fiber will affect the total reflection transmission of the optical signal in the optical fiber, as long as the optical fiber is straightened.

4. If the optical fiber of the outdoor part is broken or the optical port of the equipment in the computer room is faulty, it is necessary to report the broadband fault, and there will be staff to come to the door to troubleshoot the fault after the fault report.

If the LOS light flashes red, it is preliminarily judged that the modem cannot receive the light signal or is too weak, you can follow the steps below to check further:

1. Please check whether the connection between the yellow pigtail and the optical cat is loose;

2. If there is any looseness, please reconnect it manually and restart the modem;

3. If the "LOS" light indicator continues to flash, please report the fault.

los=Lost means that the light source signal is lost, and in most cases the light connector is broken.

Generally speaking, most of the cold connectors are used, if you don't want to be old, it's best to ask for a light jumper with the maintenance personnel, or the connector is hot melted, and the network maintenance personnel call ** for repair.

If the network fails, call ** to report the fault.

What's going on with the LOS flashing red light on the cat?