OptiX OSN3500 subrack is divided into two layers, the upper layer is mainly for the interface board slot area, with a total of 19 slots, and the lower layer is mainly for the processing board slot area, with a total of 18 slots. The subrack adopts a two-tier subrack structure, which is divided into the interface board area, processing board area, fan area, and alignment area. OSN equipment has the management and maintenance capability of layered architecture like SDH, which simplifies the operation and maintenance of packet services, and realizes end-to-end packet service configuration, debugging, and fault localization.

Huawei OSN3500 transmission equipment causes P_LOS alarms due to cable deployment that exceeds the length supported by the equipment, so it is recommended that the cable length be kept within 50 meters to avoid service impact.

Procedure

Huawei OSN3500 reports P_LOS as a PDH interface signal lossalarm. The main cause of the P_LOS alarm is that the deployment of the relay cable is too long, and the OSN3500 equipment has strict requirements for the length of the relay cable in the PDH service.

1. Check the interface board corresponding to the PL3 single board, confirm that the interface board is inserted correctly, and rule out the interface board failure.
2. Check the equipment interface and DDF rack connection, no abnormality is found, and rule out these two reasons.
3. Check the cable length from the DDF frame to the location of the device, found that the cable length is more than 70 meters, adjust the location of the device so that the cable length is less than 50 meters, the alarm disappears.

This chapter of technical information and related SDH equipment troubleshooting procedures provided by Shenzhen Optical Transmission Network Technology Co. Huawei SDH optical transmission equipment, SDH transmission equipment sales phone: 13430988088 Welcome to telephone consultation!