Overview
The Huawei QSFP-40G-LX4-MM is a high-performance 40G QSFP+ optical transceiver module designed for enterprise networks, cloud computing platforms, and high-density data center environments. Supporting 40GBASE-LX4 Ethernet standards, this module delivers reliable 40Gbps transmission over OM3 and OM4 multimode fiber up to 150 meters through a duplex LC interface.
Using advanced CWDM technology with four optical wavelengths, the QSFP-40G-LX4-MM provides stable long-distance multimode transmission while simplifying the migration from traditional 10G LC fiber infrastructures to 40G Ethernet networks. Compared with MPO-based SR4 modules, this solution allows enterprises to reuse existing LC cabling systems, significantly reducing upgrade costs and deployment complexity.
The module features low power consumption, hot-swappable capability, Digital Diagnostic Monitoring (DDM), and excellent compatibility with Huawei CloudEngine switches and other mainstream networking platforms.
Figure 1 shows the front panel of QSFP-40G-LX4-MM.
Quick Specifications
| Parameter |
Specification |
| Product Model |
QSFP-40G-LX4-MM |
| Form Factor |
QSFP+ |
| Data Rate |
40Gbps |
| Ethernet Standard |
40GBASE-LX4 |
| Connector Type |
Duplex LC |
| Fiber Type |
Multimode Fiber (MMF) |
| Max Transmission Distance |
150m |
| Wavelength |
1271nm / 1291nm / 1311nm / 1331nm |
| DDM Support |
Yes |
| Operating Temperature |
0°C to 70°C |
| Hot Swappable |
Yes |
| Application |
40G Ethernet Networks |
Key Features
High-Speed 40G Ethernet Performance
Provides stable and efficient 40Gbps data transmission for enterprise backbone networks and modern cloud data centers.
Duplex LC Connectivity
Uses standard duplex LC connectors instead of MPO/MTP interfaces, making deployment easier and more cost-effective.
Easy 10G to 40G Migration
Ideal for upgrading existing LC fiber infrastructures without replacing current cabling systems.
Advanced CWDM Technology
Utilizes four CWDM wavelengths to achieve efficient 40G optical transmission over multimode fiber.
Digital Diagnostic Monitoring (DDM)
Supports real-time monitoring of:
- Optical transmit power
- Optical receive power
- Voltage
- Temperature
- Laser bias current
Enterprise-Grade Reliability
Manufactured with strict quality control standards to ensure long-term stable network performance.
Technical Specifications
| Item |
Details |
| Product Name |
Huawei QSFP-40G-LX4-MM |
| Form Type |
QSFP+ Optical Module |
| Transmission Speed |
40Gbps |
| Connector |
LC Duplex |
| Fiber Mode |
MMF |
| Maximum Distance |
150m |
| Optical Technology |
CWDM4 |
| Compliance Standard |
IEEE 802.3ba |
| Diagnostic Function |
DDM/DOM Supported |
| Installation |
Hot Pluggable |
| Power Consumption |
Low Power Design |
| Operating Case Temperature |
0°C ~ 70°C |
QSFP-40G-LX4-MM vs QSFP-40G-SR4
| Feature |
QSFP-40G-LX4-MM |
QSFP-40G-SR4 |
| Connector Type |
LC Duplex |
MPO/MTP |
| Fiber Quantity |
2 Fibers |
8 Fibers |
| Cabling Cost |
Lower |
Higher |
| Deployment Complexity |
Easy |
Moderate |
| Existing LC Infrastructure Support |
Yes |
No |
| Typical Distance |
Up to 150m |
Up to 100-150m |
| Best Application |
Network Upgrades |
New Deployments |
The QSFP-40G-LX4-MM is an excellent solution for enterprises that want to upgrade existing LC-based network infrastructures to 40G Ethernet without expensive fiber replacement projects.
Application Scenarios
- Enterprise core networks
- Cloud data centers
- Spine-leaf architecture
- Storage area networks
- High-performance computing (HPC)
- Data center interconnects
- Campus aggregation networks
- 40G Ethernet switching systems
Product Advantages
- High compatibility with Huawei networking equipment
- Stable 40G transmission performance
- Simplified cabling deployment
- Lower infrastructure upgrade cost
- Low latency and low power consumption
- Easy installation and maintenance
- Reliable enterprise-grade design
FAQ
What is the maximum transmission distance of Huawei QSFP-40G-LX4-MM?
The module supports transmission distances up to 150 meters over OM3 or OM4 multimode fiber.
Does the QSFP-40G-LX4-MM use LC or MPO connectors?
This module uses a duplex LC connector, allowing easier integration with existing LC fiber infrastructures.
What is the main difference between QSFP-40G-LX4-MM and QSFP-40G-SR4?
QSFP-40G-LX4-MM uses CWDM technology and LC duplex connectors, while SR4 modules use MPO/MTP parallel optics. LX4 modules are more suitable for upgrading traditional LC-based networks.
Is this module compatible with third-party switches?
Compatible coded versions are available for Huawei, Cisco, Juniper, Arista, HPE, and other major networking brands.
Does the module support Digital Diagnostic Monitoring?
Yes. The module supports DDM/DOM functions for real-time monitoring and diagnostics.
Is QSFP-40G-LX4-MM suitable for data center applications?
Yes. It is widely used in enterprise and cloud data center environments requiring stable high-speed 40G connectivity.
Technical Support & After-Sales Service
Professional Technical Support
Our technical team provides:
- Compatibility confirmation
- Network deployment suggestions
- Fiber cabling recommendations
- Configuration assistance
- Troubleshooting support
Quality Assurance
- 100% tested before shipment
- Strict quality inspection process
- Stable product performance
- Warranty support available
Fast Global Delivery
Supports worldwide shipping with secure packaging and fast logistics services.
Why Choose Huawei QSFP-40G-LX4-MM?
The Huawei QSFP-40G-LX4-MM optical transceiver is a cost-effective and reliable solution for enterprises upgrading to 40G Ethernet networks. With LC duplex connectivity, CWDM technology, low power consumption, and enterprise-grade stability, this module helps simplify network upgrades while reducing overall infrastructure costs.
It is an ideal choice for modern data centers, cloud computing environments, and high-performance enterprise networks requiring dependable 40G optical connectivity.
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