Huawei ETP4890-A2
Huawei ETP4890-A2 1U Subrack Telecom Power System (90A/-48VDC/Supports 3×R4830G1/SMU01C)
Product information
View supportSupport & Troubleshooting
Find equipment information and technical guides by model, and bring clarity to on-site issues.
Find support by equipment
Choose a device to view its information and ask a specific technical question.
Huawei GPON OLT Class C+
Huawei GPON OLT Class C+ Standard BiDi Optical Transceiver Module (SC/UPC)
Product information
View support
Huawei GPON OLT Class C++
Huawei GPON OLT Class C++ High-Power BiDi Optical Transceiver Module (SC/UPC)
Product information
View support
Huawei H801EG8E 8-Port GE Board
Huawei H801EG8E 8-Port Gigabit Ethernet Optical Board (For SmartAX MA5680T/MA5683T)
Product information
View support
Huawei H802A2EF2 Fast Ethernet Board
Huawei H802A2EF2 Fast Ethernet Optical Service Board (For SmartAX MA5680T/MA5683T)
Product information
View support
Huawei H802A2EXL2 Uplink Board
Huawei H802A2EXL2 High-Speed Uplink Interface Board (For SmartAX MA5680T/MA5683T)
Product information
View supportTechnical guides & references
Explore published articles on equipment selection, interfaces and maintenance.
Engineering Guide: Telecom Rectifier Gold Finger Pinout, Standalone Jumpers, and CAN Bus Voltage Tuning
A comprehensive technical breakdown of 48V/50A rectifier modules (Huawei R4850G2 / ETP48400 architecture), covering blind-mate connector pinouts, standalone startup jumpers, CAN 2.0B hex commands for CV/CC adjustment, and active current sharing troubleshooting.
Huawei 100G QSFP28 LR4 Optical Transceiver: Cleaning Procedure, Optical Power Testing & Troubleshooting Guide
A comprehensive hands-on engineering guide to Huawei 100G QSFP28 LR4 optical transceivers. Covers fiber end-face inspection and dry/wet cleaning protocols, DDM optical power measurement limits, and step-by-step troubleshooting for multi-vendor switch interoperability.
Huawei R4850G2 Rectifier Pinout Definition, Standalone Startup & 53.5V Wiring Guide
A comprehensive practical guide for field telecom engineers: deciphering the gold-finger backplane pinout of Huawei R4850G2 (50A/3000W), standalone offline startup without controller, CAN bus voltage adjustment, and safety precautions.
Have a model and an on-site issue?
Share the exact model, alarm text and observed symptoms to help identify relevant information and compatibility requirements.