Product Overview
The QSFP-40G-LR4 is listed in Huawei’s 40G series: 41.25 Gbit/s 40GBASE-LR4 as four 10G CWDM lanes at 1271, 1291, 1311 and 1331 nm multiplexed onto a duplex LC singlemode pair, documented for 10 km on SMF.
It remains the standard long-reach module for legacy 40G campus and metro links, while new 40G builds increasingly favor eSR4 for in-hall and move directly to 100G/400G duplex optics for longer spans.
- 40GBASE-LR4 over 4 CWDM wavelengths (1271/1291/1311/1331 nm)
- 10 km reach on singlemode fiber per Huawei official 40G series table
- Duplex LC interface over standard SMF plant
| Rate | 41.25 Gbit/s (40GBASE-LR4, 4×10G CWDM) |
| Interface | QSFP+, LC duplex |
| Wavelength | 1271/1291/1311/1331 nm |
| Reach | 10 km on SMF |
| Fiber | SMF |
| Operating Temperature | 0°C to +70°C (case) |
| Compatibility | Huawei QSFP+ slots, 40GBASE-LR4 (IEEE 802.3ba) |
Key Features of QSFP-40G-LR4 40GBASE-LR4 CWDM
QSFP-40G-LR4 40GBASE-LR4 CWDM belongs to the pluggable optical transceiver family used for high-speed data links. Modules of this class commonly cover form factors such as SFP, SFP+, SFP28, QSFP+, QSFP28 and QSFP-DD, with multimode and singlemode variants for different reach requirements.
Typical Applications of QSFP-40G-LR4 40GBASE-LR4 CWDM
Optical modules of this type are widely used for switch-to-switch links, storage networks, data center interconnects and telecom transmission equipment. Match the module to your switch vendor, wavelength and link distance before ordering.
Selecting QSFP-40G-LR4 40GBASE-LR4 CWDM with BS Comtec
BS Comtec supplies optical transceivers from Huawei, Cisco, Accelink and other brands with global delivery. Send us your switch model, port type and required distance, and we will recommend compatible modules and provide pricing.
Frequently Asked Questions
How do I choose the right QSFP-40G-LR4 40GBASE-LR4 CWDM for my network?
Check your equipment port type, data rate, fiber type (multimode or singlemode), wavelength and link distance. BS Comtec can cross-check these details and suggest compatible options from multiple brands.
Is QSFP-40G-LR4 40GBASE-LR4 CWDM compatible with my switch or router?
Most platforms work with standard-compliant modules, while some vendors apply compatibility lists or coded modules. Share your device model with BS Comtec and we will confirm suitability before shipment.
How is QSFP-40G-LR4 40GBASE-LR4 CWDM packed and delivered?
Modules are shipped in anti-static packaging suitable for international transport. BS Comtec arranges global delivery, and shipping options depend on destination and urgency — contact us for details.
What warranty applies to QSFP-40G-LR4 40GBASE-LR4 CWDM?
Warranty follows the manufacturer’s policy for the specific part number. BS Comtec supports replacement and RMA coordination according to the terms confirmed in your order.
Where is QSFP-40G-LR4 40GBASE-LR4 CWDM typically used?
It is typically used in data centers, enterprise networks, carrier transmission and campus backbones for high-speed fiber connections between switches, routers and storage systems.
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