Article Overview
A Huawei optical module may fail to send signals due to faulty hardware, incorrect installation, port configuration mismatches, or non-certified modules.
Check Physical Installation and Module Health
Ensure the optical module is securely installed in the port. Remove and reinstall the module to confirm proper seating. Use an optical power meter to measure the transmit optical power; if it is abnormal, the module may be faulty and require replacement with a Huawei-certified module of the same type .
Verify Port and Module Compatibility
- Confirm the optical module type matches the port (single-mode with single-mode fiber, multi-mode with multi-mode fiber).
- Check that the wavelength, speed, and duplex settings are compatible on both ends of the link .
- If the port is a combo port, ensure it is configured to operate as an optical port .
Use Huawei Commands to Diagnose
- Run
display transceiverto view all optical module information ordisplay transceiver interface <interface-type> <interface-number>for a specific port . - Use
display interface <interface-type> <interface-number>to check link status, interface rate, and traffic statistics; the link must be UP for normal operation . - For detailed diagnostics, use the
verboseparameter to view receive and transmit power, temperature, voltage, and bias current .
Check Fiber and Connection
- Ensure the fiber jumper is not reversed and is in good condition.
- Verify that the fiber mode matches the module and that there is no excessive attenuation or damage .
- If the opposite module's indicator light is off, try switching fiber ends to isolate the faulty side .
Additional Considerations
- Non-Huawei-certified modules may not function correctly; replace with a Huawei-certified optical module if necessary .
- If FCS or CRC errors occur, perform a self-loop test to determine if the port itself is faulty .
- If the problem persists after these checks, collect log information and contact Huawei technical support for further assistance . Following these steps systematically should help identify whether the issue is due to the optical module, port configuration, fiber connection, or compatibility, allowing you to restore normal optical transmission.
Replacing an Optical Module
Huawei is not responsible for any problem caused by the use of non-Huawei-certified optical modules and will not fix such problems.
Optical Modules Fail to Communicate
Optical Modules Fail to Communicate Symptom Two optical interfaces are interconnected through optical fibers. An
Optical Module: Typical Optical Module Troubleshooting Procedure
If it is not a Huawei-certified optical module, replace it with a Huawei-certified optical module. If the optical module is installed on a
Optical Modules Fail to Communicate
Devices must use optical modules certified by Huawei. Those that are not certified by Huawei cannot ensure service reliability, and
Troubleshooting Huawei UPS cable tray: Optical Interfaces, Stacking
This FAQ addresses the most common pre-sales and post-sales questions regarding replacement cable tray modules for Huawei UPS
Troubleshooting Optical Module Issues
The Huawei-certified optical module has a silkscreen label of five lines printed above the barcode, and the silkscreen font must be
How to deal with ONT failure due to mismatched optical modules of
At this time, it is suspected that either the softswitch has not issued the digitmap, or the softswitch has issued the digitmap but the
ALM-135462942 The optical module is invalid 136221
Replace the optical module, and check whether the alarm is cleared. If so, the alarm handling ends. If not, collect alarms, logs, and
Troubleshooting Guidelines for Optical Modules
An Optical Module Does Not Send Optical Signals The Transmit Optical Power of an Optical Module Is Too Low Information About
An Optical Module Does Not Send Optical Signals
Remove and reinstall the optical module. If the fault persists, replace the optical module with a normal one of the same type to check
Replacing an Optical Module
Replacing an optical module interrupts services. Ensure that the optical module is faulty before replacing it. Only external optical
Displaying Optical Module Information
The optical module cannot be installed in an optical interface because the optical module structure is nonstandard. The structure and
Checking the Receive and Transmit Optical Power
This may cause low receive optical power on the remote optical module. As a result, the remote interface may not go Up or discard
Optical Module Solutions for Huawei S5700/S5720 Series Switches
When using switches, we may encounter many confusions, such as what types of optical modules are needed for
Typical Troubleshooting Cases of Optical Module
If not, replace it with a Huawei-certified optical module. If the optical module is installed on a GE port, run the display interface
How to Detect Abnormal Optical Module When the Power cannot Be
5. To locate which optical module is abnormal, after the optical modules of NE80E and NE40E are changed, the interface of NE80E
Displaying Optical Module Information
Displaying Optical Module Information You can use the display commands to view information about the optical module on an
Optical Module Solutions for Huawei S5700/S5720 Series Switches
This article summarizes several solutions for using optical modules with switches and common problems encountered
Optical Interface Interconnection Is Abnormal on CE Switches
Possible Causes The optical module model does not match. The transmit or receive optical power of an optical
Troubleshooting Guidelines for Optical Modules
If the optical module type does not match the interface (fault ID: 136203), check whether the optical module rate is
Troubleshooting Optical Module Issues
Troubleshooting Optical Module Issues Symptom An optical port cannot go Up. The optical module cannot be properly
What Is an Optical Module and Its FAQs (V200)
If the value is not HUAWEI, the optical module is not certified for Huawei data center switches. Alternatively, you can send the optical
Optical Interface FAQ: Transceiver Compatibility Guidelines for
Overview & Thematic ScopeThis FAQ addresses one of the most critical operational decisions for network engineers managing
Huawei Switches Viewing Optical Port Receiving and Sending
Use the command display transceiver to view the optical module information of all optical ports, and use the command
Optical Module: An Optical Module Does Not Send Light Signals
Procedure Use an optical power meter to test whether the transmit power of the optical module is normal. If not, replace the optical
Displaying Optical Module Information
When certifying an optical module, Huawei comprehensively verifies the functions of the optical module to ensure the optical module
How To View Optical Transceiver Information On Huawei Switches
Optical transceivers are widely applied in switches, network cards, routers and other communication devices.
How To View Optical Transceiver Information On Huawei Switches
Optical modules are commonly used in switches, network cards, routers and other communications equipment, in the
Checking the Optical Module Type
Some non-certified optical modules are not designed in compliance with EMC standards and have low anti-interference capability.
Checking the Optical Module
Ensure that the rate, wavelength, and transmission distance of the interconnected optical modules are consistent. Using the same
Troubleshooting for Optical Modules on Huawei Switch
When this optical module uses OM3 multimode optical fibers, its transmission distance is 0.3 km. The optical modules used on both
Optical Module Troubleshooting
If there is a Huawei logo on the label, the optical module has been certified for Huawei data center switches. If not, send the model of
How Do I Ensure that the Transmit and Receive Optical Power of an
You are advised to replace the optical module. To ensure normal communication between two optical interfaces, check for transmit
Optical Module: The Device Cannot Display Any Optical Module
Check whether the optical modules are Huawei-certified ones. If not, contact the vendor of the optical modules. If possible, remove
An Optical Module Does Not Send Optical Signals
An Optical Module Does Not Send Optical Signals Symptom The display interface transceiver verbose command output in the
Troubleshooting for Optical Modules on Huawei Switch
Check whether the optical module is Huawei-certified. If it is not certified by Huawei, replace it with a Huawei certified one. Remove
Related Resources
- Cost of repairing fiber optic cables
- One optical splitter for two operators
- How to understand the relationship between distribution boxes
- Requirements for power distribution boxes in landscaping and greening
- 12-core optical cable in multiple reels
- Configuration of two access switches
- Pipeline laying in Belgium
- Distance between bare wires in the distribution box and cabinet door
- Optical Amplifier Bands
- Laboratory Explosion-proof Distribution Box
- Inspection Checklist for Electrical Distribution Boxes
- Cable tray elbow quick coupling