Frequently Q&A About Optical Transceiver Use

GIGALIGHT
3 min readMay 26, 2021

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As a more sensitive optical device, optical transceivers sometimes have some problems during use. Below, Gigalight Communications will list some common problems and solutions for optical transceivers in use. Let’s learn together!

NO.1

Q:Why doesn’t the light of the optical port light up after the two optical transceivers are interconnected?
A:a: The parameters of the optical transceivers at both ends do not match, such as wavelength, speed, and transmission distance.
b: The type of fiber jumper used does not match the optical transceiver.
c: The optical transceiver is not compatible with the switch brand.

Solution: First check whether the status of the optical port is turned on, then check whether the optical transceiver parameters at both ends match, and whether the optical transceiver type matches the jumper type, and then check whether the gateway is configured and the VLAN is consistent. If the switch brand is not compatible with the optical transceiver, you need to replace the compatible optical transceiver.

NO.2

Q:Why does the indicator of the optical transceiver at end A turn on after connection, but the indicator of the optical transceiver at end B does not turn on?
A:If the fiber jumper corresponding to the receiving port of the optical transceiver is normal, the problem lies in the fiber jumper of the sending port;
Solution: Change the positions of the fiber jumpers at both ends. If the optical transceiver indicator on the B end is on but the optical transceiver indicator on the A is off, it means that there is a problem with one of the fiber jumpers. If the A-side optical transceiver can receive the optical signal from the B-side optical transceiver but the B-side optical transceiver cannot receive the optical signal from the A-side optical transceiver, it is certain that there is a problem with the A-side optical transceiver or the jumper.

NO.3

Q:What should I do if the switch indicator turns red after the optical transceiver is inserted?
A:The main reason is that the optical transceiver is not compatible. You can open the operating data and check the manufacturer’s information of the optical transceiver. If it is incompatible with the switch brand, you can directly replace the optical transceiver.

NO.4

Q:What should I do if an interface alarm message appears after the optical transceiver is inserted?
A:You can check the working parameters of the optical transceiver, interface information, and whether the receiving and sending packets are normal, and then check the optical fiber jumper, or try to replace the optical fiber jumper and optical transceiver. After the optical transceiver is replaced, you need to observe the status of the warning light.

NO.5

Q:What should I do when the ISM monitors an optical transceiver failure alarm and the corresponding port of the optical transceiver turns on red?
A:First check the log information IP_MAIN/event/event.txt file, there is an optical transceiver failure alarm, and then check the log information corresponding to the time point of IP_MAIN/Mseesages/Message_xxx.log. In addition, the alarm information and information description of the failure of the optical transceiver are shown in the following table. It should be noted that if the alarm information displays 0x00000110, the alarm reason is 0x00000100 and 0x00000010.

NO.6

Q:Why is there electrostatic damage to the optical transceiver?
A:a: The environment is dry and it is easy to generate static electricity. Static electricity will attract dust, change the impedance between the lines, and affect the function and life of the optical transceiver;
b: abnormal operation;
c: The equipment is not grounded or the grounding is poor.
Solution: Wear anti-static gloves and anti-static shoes when touching the optical transceiver.

Please leave a message to comment on your question, and we will answer it in a future column.

Originally published at https://www.gigalight.com.

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GIGALIGHT
GIGALIGHT

Written by GIGALIGHT

GIGALIGHT is an open optical network device explorer focusing on data center & cloud computing, wireless & 5G, and metro & broadcast networks.

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