2025-02-27 0

Technical analysis of the incompatibility between the TN55TSC board and the 100G 10KM optical module

Technical analysis of the incompatibility between the TN55TSC board and the 100G 10KM optical module

Background of the problem
During the goods testing process before delivery to the customer, the technicians found that the optical module model 100G-10 km-CFP (34060669) and the TN55TSC board on the OSN8800 chassis had an alarm prompt of “incompatibility” in the system, but the actual service functions (rate, bit error rate, optical power, etc.) were all normal.

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Problem phenomenon and troubleshooting
Alarm phenomenon
○ After the optical module is inserted into the TN55TSC board, the equipment network management system prompts the “module type mismatch” alarm.

○ Verification of official information: Query through Huawei Enterprise Support Website (eSupport)
■ The module is clearly included in the list of optical modules supported by the TN55TSC board
■ The parameters of the module specification are consistent with those of the board technical manual (wavelength 1310nm, transmission distance 10km, OTU4 mapping mode)

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■ Hardware compatibility verification
○ The laboratory retested the same model module on other TN55TSC boards (different batches) and it can be recognized normally, eliminating the problem of hardware batch differences.
○ The optical power test shows that the module performance meets the standard.

 

Root cause analysis
Software version compatibility difference
○ The TN55TSC board version is newer, and the system may prompt “incompatible” equipment because the compatibility list (ECN) has not been updated in time.
○ The electronic label information of the module lacks the identification field required for a specific firmware version, triggering the system alarm mechanism, but the physical layer communication is not affected.

微信图片 20250210173544

 

Conclusion
The “incompatibility” alarm problem between the TN55TSC board and the optical module is essentially caused by the synchronization delay between the software version iteration and the hardware identification library, which does not affect the actual performance. Users can ignore the alarm and use it normally. If you have any questions, please feel free to contact us, and we will have professional technicians and sales teams to solve it for you.