XFP not supporting FC800 services OSN8800 TN55TQX

TN55TQX card in general supports various service types including STM-64, OC192, 10GE, FC800, FC1200 or OTU2. However there are dedicated XFP modules (BOMs) for different services. Unfortunately U2000 does not alert or notify when user creates service with wrong XFP type. Moreover many XFPs will actually work although wrong service type is created. For example customer… Read More »


Rectification Notice of Faulty MOS Transistors on TN51XCS Boards

Summary: Metal-oxide semiconductor (MOS) transistors in a lot used on TN51XCS boards intended for the Huawei OptiX OSN 8800 have a defect. Because of the defect, the noise introduced by the 12 V power supply on the TN51XCS board is out of range and interferes the signals transmitted over the adjacent high-speed buses. This interference… Read More »

How to Prevent a License Defect Flash Exhaustion on the Main Control Board

Abstract: When the license module processes interchange messages for hot standby between the working and protection main control boards, commissioning information will accumulate to the flash and finally exhaust the flash space. As a result, configuration data fails to be saved and database backup fails. [Problem Description] Trigger conditions: Two main control boards are configured… Read More »

Be aware of SSN3PSXCSA replace Cross-connect Board on OptiX OSN 3500

Summary: When an SSN3PSXCSA (Ver.B) board is used to replace another cross-connect board, after the SSN3PSXCSA (Ver.B) board is inserted into the subrack, the state of the original active cross-connect board is abnormal and NE services are interrupted. After about 40s, the state of the original active board is back to normal and services recover.… Read More »

Cautions for Drive Failure on the SSX2T2TM Module

Summary: A 10G OTU board reports an OTU2_LOF alarm at a low probability on the Huawei WDM side during the running. When this alarm is reported, services are interrupted and the alarm persists. [Problem Description] Trigger conditions: This problem has no external trigger conditions, and occurs at a 1% probability during normal running. Symptom: An… Read More »

Pay attention to Optical Power Reporting of Modules in WDM Products

Summary: When fibers on boards that use the HXFP8240, HXFP8440, or HXFP8441 pluggable module on dwdm huawei boards are being removed or inserted, the reported optical power at the receive end is sometimes lower than the actual optical power. [Problem Description] Trigger conditions: The problem occasionally occurs when customer fibers are removed and re-inserted. Symptom:… Read More »