Description of the problem

The Metro2500+ Optix Metro3000 network element inserts a 63SD1/63SL1 single board in slot 14, resulting in a TPS protection group with slot 16 as the protection board slot, and the TPS inversion is normal, but the service is interrupted after the inversion, and alarms such as BIP_SD/BIP_OVER/TU_LOP/TU_AIS may be reported.

Processing

summarize

root cause

Because SS63SD1/SS63SL1 share PCB with SS63SQ1 single board; SS63SQ1 single board has to occupy 4-way VC4 bus, when SS63SQ1 single board is inserted in IU12 slot, 4-way bus is occupied, and IUP slot can not be inserted again. And since SS63SD1 and SS63SL1 share the same PCB with SS63SQ1, 63SD1 and 63SL1 also have 4-way VC4 buses connected to the backplane buses on the PCB physical connection, of which only two VC4 (SD1) and one VC4 (SL1) are used. So PCB more than the bus connected to the backplane will have current signals introduced to the backplane bus to cause interference.

Solution

Replace the veneer, or change the configuration.

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