Tag Archives: OptiX OSN 1800

The IN_PWR_HIGH Alarm Indicating Source Optical Module Faults

Summary: An OTU board reports the IN_PWR_HIGH alarm indicating that a resistor fails in the Source optical module. Constantly reporting the alarm does not affect services, but is perceivable. Product Line: Transport                     Product Family: WDM Product Model:  OptiX OSN 1800 OptiX OSN 6800 OptiX Metro 6100 [Problem Description] Trigger conditions: There is a low probability that an OTU board reports the IN_PWR_HIGH alarm after it has been running with an 80-km CWDM Source optical module for over a year. Symptom: An OTU board reports the IN_PWR_HIGH alarm while services are running properly. The maximum receive optical power is –7.x dBm, where x is a digit. Identification method: Verify that the following conditions are met: The OTU board is installed on the OptiX OSN 1800, OptiX Metro 6100, or OptiX OSN 6800. The model type of the optical module on the OTU board contains the “6128C-SL80″ or “6128C-L80″ field. The model type of the optical module can be determined by viewing the manufacturing information. Figure 1 shows the manufacturing information of an example optical module with the Navigator Command (cfg-get-bdinfo:),. Manufacturing information of an example optical module The model type of the optical module with blue label is 6128C-SL8055G, which contains the “6128C-SL80″ field. [Root Cause] A resistor fails in the 80-km CWDM Source optical module. This increases the resistance from 3000 ohm to over 1000,000 ohm and the voltage to the saturation voltage. As a result, the receive optical power exceeds the specified threshold.   [Impact and Risk] This issue may occur on the equipment in and outside China. Constantly reporting the alarm does not affect services, but is perceivable.   [Measures and Solutions] Recovery measures: N/A Workarounds: Replace the optical module. Preventive measures: Replace the optical module. Optical modules provided by Source Photonics are CWDM optical modules, which correspond to eight BOM numbers. The following table describes the mapping between the BOM numbers and wavelengths. Material handling after replacement: The replaced optical module is scrapped.   [Rectification Scope and Time Requirements] N/A

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Be ware of NEs Occasionally Becoming Unreachable on OptiX OSN 1800

Summary There is a low probability that NEs report SWDL_NEPKGCHECK alarms when OptiX OSN 1800s are upgraded from V100R003C01SPC200 or earlier versions to V100R003C01SPC300. As a result, some boards cannot start up and non-gateway NEs may become unreachable. [Problem Description] Trigger condition: Huawei transmission equipment OptiX OSN 1800s are upgraded to V100R003C01SPC300..There is a low probability… Read More »

Pay attention to the Software Version Compatibility Issue in OptiX OSN 1800

Summary: For Huawei transmission equipment OptiX OSN 1800 V100R003C01SPC200 (5.67.03.23) or an earlier version, services on the TNF2LQM or TNF2LDGF2 board that uses the service chip of version V110 will be unavailable after the board is initialized because of a bug. The problem can be resolved by upgrading the OptiX OSN 1800 to V100R003C01SPC300 (5.67.03.25)… Read More »

Have You Ever Meet Of The OCTL Port Application in the OptiX OSN 1800

Summary An OCTL port on a TNF1SCC board can only be connected to an OCTL port on a CTL board of an OADM frame through a straight-through network cable. Due to the fact that the OCTL port appears similar to a common network port, the OCTL port is likely to be misconnected and short-circuited, causing… Read More »