Processes E1 optical signals and overhead, and supports alarms, performance events, and maintenance functions. Includes client-side receive/transmit module, mapping/de-mapping module, interface conversion module, logic and control module, clock module and power supply module. The PFL1 as a PDH processing board, which can be used on the OptiX OSN series of equipment to receive/transmit and process 8xE1 optical signals. Huawei OSN3500 8xE1, PFL1 optical processing board The PFL1 is available in a functional version, N1. The PFL1 can be installed in slots 1-8 and slots 11-16. Setting Value Basic functions PFL1 can process 8xE1 optical signals. Service processing Receives/transmits and processes 8 E1 optical signals. Supports transparent transmission according to IEEE C37.94 standard to meet the transmission requirements of relay protection equipment in the electric power industry. Optical Port Specifications Supports I-2M optical ports, complying with the standards set by Huawei. Optical module specifications Supports detecting and querying information about an optical module. Allows you to set the on/off state of a laser and supports the Automatic Laser Shutdown (ALS) function. Supports the use and monitoring of eSFP optical modules, facilitating the maintenance of optical modules. Treatment of overheads Handles path overhead at the VC-12 level, such as J2 bytes. Performance alarms and events Provides various alarms and performance events, facilitating equipment management and maintenance. Maintenance functions Supports inloops and outloops on optical ports. Supports hot reset and cold reset. Warm resets do not affect running services. Support card manufacturer information query. Supports in-service FPGA loading. Supports card software upgrades without affecting running services. Support PRBS function. Hot board swap. Protection scheme TPS protection is not supported.