Description of the problem

The customer bought a new spare part Huawei OSN3500 device N4GSCC single board, the shipping version is 5.21.18.50p01, but the version of the existing network is 5.21.18.50, the customer requires a unified version, and needs to downgrade the software of the single board to the 18.50 version. The lowest version of N4GSCC main control board in the version matching table should be 5.21.18.50p01, which can't be downgraded, but in the package "OptiX OSN3500V100R008C02B01L Software", you can see N4GSCC software, which can be downgraded to 18.50 version. Why can't this software be used on the existing N4GSCC?

Process

The PCB version of the single board in the field query is VER.D, so it cannot be downgraded with the package of N4GSCC in OptiX OSN3500V100R008C02B01L Software. Otherwise, memory allocation will fail, resulting in various anomalies.

Root cause

The software of N4GSCC in OptiX OSN3500V100R008C02B01L Software is the software of N4GSCC's single boards which were originally developed, and the PCB versions of these single boards are VER. C and VER.D, and the memory size is 512M, this kind of N4GSCC main control board can only be supported in 5.21.18.50P01.

D, the memory size is 512M, this kind of N4GSCC main control board can only be supported by 5.21.18.50P01. Currently, the PCB version of N4GSCC shipped in the field are VER.C and above.

Recommendations and Summary

Since N4GSCC for VER.A and VER.B are basically non-existent at this time, it is recommended that the N4GSCC software in the OptiX OSN3500V100R008C02B01L Software package be deleted to avoid misunderstanding by field personnel.

This chapter of related technical information and SDH equipment troubleshooting process is collected and organized by Shenzhen Optical Transmission Network Technology Limited ( www.opticaltrans.com), reproduced please retain! Our company specializes in the sale of Huawei SDH optical transmission equipment, SDH transmission equipment.