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When OptiX OSN 3500 and Metro devices are connected to the network, it is necessary to pay attention to the correspondence between the broadcast data interfaces to ensure the successful connection of the broadcast data service.When OptiX OSN devices are connected to the SDH device Metro 1000 for networking, the Serial 1 port of the OSN devices is connected to the Serial 1 port of Metro 1000 for transparently transmitting a broadcast data service, and the service is not available. The optical interface board N1SF64 of OptiX OSN 3500 and A1SF64 of OptiX 10G (Metro 5000) support different protocols, and the services cannot run normally after the two boards are connected. After docking with two optical interface boards supporting the same protocol, the service is restored to normal.
OptiX OSN 7500
OptiX OSN 7500
Failure Category
- Device docking failure
- BEFFEC_EXC
- PLL_FAIL
Phenomenon Description
OptiX OSN 3500's optical wavelength interface board N1SF64 and OptiX 10G(Metro 5000)'s A1SF64 support different protocols, and the services cannot run normally after the two single boards are docked.
Cause Analysis
The transmission device utilizes four unused overhead bytes to transmit broadcast data.
- The Serial 1 byte of the OSN is defined in the SDH overhead byte as the 1st unused byte after D3 in the regeneration segment. The physical port is typically the S1 port.
- The Serial 2 byte of the OSN is defined in the SDH overhead byte as the 2nd unused byte after D3 in the regeneration segment. The physical port is typically the S2 port.
- The Serial 3 byte of the OSN is defined in the SDH overhead byte as the 2nd unused byte after D12 in the reuse segment. The physical port is typically the S3 port.
- The Serial 4 byte of the OSN is defined in the SDH overhead byte as the 1st unused byte after D4 in the multiplexed segment. The physical port is typically the S4 port.
- The SDH Serial 1 byte corresponds to the F2 byte and is the 2nd unused byte after D12 in the multiplexing segment. The physical port is typically the F2 port.
- The Serial 2 byte of the SDH corresponds to the X1 byte, which is the 1st unused byte of D4 in the multiplexed segment. The physical port is generally the COM2 port.
- Serial 3 byte of SDH corresponds to X2 byte, which is the 1st unused byte of D3 in the regeneration segment. The physical port is generally the COM3 port.
- Serial 4 byte of SDH corresponds to X3 byte, which is the 2nd unused byte of D3 in the regeneration segment. The physical port is generally the COM4 port.
- Serial 1 of SDH: corresponds to Serial 3 of OSN.
- Serial 2 of SDH: corresponds to Serial 4 of OSN.
- Serial 3 of SDH: corresponds to Serial 1 of OSN.
- Serial 4 of SDH: corresponds to Serial 2 of OSN.
From this, it can be seen that the service configuration failure is caused by the wrong Serial correspondence between the OSN device and the SDH device.
Operation Steps
- According to the Serial port correspondence, reconfigure the broadcast data service of the OSN equipment and the SDH equipment, so that the two ends of the equipment correspond to each other, and the fault is solved.
Operation steps
- Connect two N1SF64 boards with optical fiber.
- Perform the calibration on the network management. The service is normal and there is no abnormal alarm.
- Connect N1SF64 and A1SF64 with optical fiber.
- Perform the calibration on the network management, it does not work normally. Query the network element alarms as follows:
- BEFFEC_EXC
- PLL_FAIL
- After the two single boards are unified as same-rate optical interface boards supporting the same protocol, the service returns to normal and there is no abnormal alarm.
Reference Information
It can be seen that the unsuccessful docking between the devices is mainly caused by the Serial byte. Before conducting network testing, determine whether the protocols used by the single boards support the docking operation. If the protocols of the two docking single boards do not support docking, the service cannot operate normally after the forced docking test.
The technical information in this chapter and the related SDH equipment troubleshooting procedures are provided by Shenzhen Optical Transmission Network Technology Co. Huawei SDH optical transmission equipment, SDH transmission equipment sales phone: 13430988088 Welcome to telephone counseling!
