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Huawei SN series optical modules

Fiber and communications infrastructure knowledge brief Published 28 Dec 2025

Prepared for preliminary research by the ALFA PRO knowledge desk. Confirm optical interfaces, port or core capacity, electrical input and output, enclosure protection, thermal design and installation limits against current standards and product documentation.

Huawei SN series optical modules are certified transceivers designed for S series switches, supporting a range of speeds from 100M to 800GE with single-mode and multi-mode options.Overview

Huawei SN series optical modules are high-performance transceivers that convert electrical signals to optical signals for network transmission. They are designed specifically for Huawei S series switches and include SFP, eSFP, SFP+, QSFP+, and CSFP form factors . These modules ensure reliable connectivity, long-distance transmission, and compatibility with Huawei-certified switches.

Certification and Compatibility
  • Certified Modules: Only Huawei-certified optical modules are guaranteed to function correctly with S series switches. Certified modules display "HUAWEI" on the label, and the switch recognizes them in the display transceiver command output .
  • Non-Certified Modules: Using non-certified modules may cause frequent link up/down issues or incomplete diagnostic information .
  • Copper vs Optical: Both copper and optical modules must be certified for proper operation, though the vendor name may show the original manufacturer .
Types and Specifications
  • SFP/eSFP Modules: Commonly used for 100M/1G connections. Examples include SFP-FE-SX-MM1310 (multi-mode, 2 km) and eSFP-FE-LX-SM1310 (single-mode, 15 km), .
  • SFP+ Modules: Support 10G connections for high-speed links.
  • QSFP+ Modules: Used for 40G connections, with careful attention to orientation during installation .
  • CSFP and XFP Modules: Provide additional high-speed options for specialized applications .
  • Single-Fiber Bidirectional Modules: Allow simultaneous transmission and reception over a single fiber, reducing cabling requirements .
Advanced StarryLink Modules

Huawei's StarryLink optical modules are optimized for data center networks, offering ultra-reliable, long-distance, and secure interconnections. Key features include:

  • Short-distance optical return loss positioning for precise fault detection
  • Channel loss resistance technology for enhanced reliability
  • Exclusive optical path coupling algorithms
  • PHYSEC encryption for 100% packet security
  • Support for GE to 800GE transmission
Installation and Usage Tips
  • Fiber Type Matching: Single-mode modules must use single-mode fiber, and multi-mode modules must use multi-mode fiber .
  • Transmission Distance: Ensure the module's rated distance matches the network requirements. Multi-mode modules have shorter distances than single-mode modules .
  • Port Configuration: Use commands like display interface and display transceiver interface verbose to verify module status and optical power levels .
  • Stacking and Interconnection: For S5700/S5720 series switches, follow proper stacking and service port connection procedures to avoid link issues .
Summary

Huawei SN series optical modules provide certified, high-performance, and secure optical connectivity for S series switches. They cover a wide range of speeds and distances, with specialized modules for data centers and long-distance interconnects. Proper selection, certification verification, and fiber type matching are essential for optimal performance and reliability .

Huawei SN series optical modules - ALFA PRO COMMUNICATION SYSTEMS (Pty) Ltd [PDF]

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Huawei S series devices support optical modules of the following encapsulation types: CFP, QSFP+, QSFP28, XFP, SFP, eSFP,

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Technical note

This reference is intended for preliminary fiber and communications infrastructure research. Optical interface, fiber type, port or core capacity, electrical input and output, enclosure protection, cooling, installation limits and applicable standards must be verified for the specific project.

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