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Reliable LR4 Lite for 40G Ethernet. Stable and consistent performance.
WSP-Q40GLR4L
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QSFP 40G Ethernet - LR4 Lite, LC, 2KM
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WSP-Q40GLR4L
- Description:
- QSFP 40G Ethernet - LR4 Lite, LC, 2KM
- Rating:
Added to cart 28 times recently
- Availability:
In stock - Ready to Ship
- Brand:
- Cisco
- GTIN:
- 662680665407
- Condition:
- Warranty:
- 3
- List Price:
$7,073.00
- Price:
$3,357.0052.5% off
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WSP-Q40GLR4L Overview
WSP-Q40GLR4L is a QSFP+ transceiver designed for high-speed Ethernet communications, delivering a 40G data rate via LC connectors. It supports long-range transmission over single-mode fiber, making it ideal for data centers, enterprise networks, and telecom applications.
WSP-Q40GLR4L features a compact QSFP+ form factor and standardized physical dimensions optimized for high-density deployments. Officially documented for reliable performance, it is compatible with major networking vendors and supports critical protocols to meet the rigorous demands of modern network infrastructures.
WSP-Q40GLR4L price is $3,357.00, a 52.5% saving from the Cisco list price of $7,073.00. WSP-Q40GLR4L is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for WSP-Q40GLR4L for additional pricing. Browse the full 40G Base Modules series or explore all Cisco products.
WSP-Q40GLR4L Specifications
- Product Type
- Transceiver
- Connector Type
- LC
- Supported Protocols
- Ethernet
- Network Interface
- Fiber
- Operating Temperature
- 0 to 70°C
- Storage Temperature
- -40 to 85°C
- Input Voltage
- 3.3V
- Compatibility
- Cisco / Juniper / Huawei / Arista
- Transmission Distance
- Long-Range
- Fiber Type
- Single-mode
- Max Distance
- 10 km
- Data Rate
- 40G
- Form Factor
- QSFP+
- Wavelength
- 1271/1291/1311/1331 nm
- Power Consumption
- 4.8W
- Product Name
- WSP-Q40GLR4L
- Height
- 0.54 inches
- Width
- 0.54 inches
- Depth
- 1.8 inches
- Weight
- 0.2 lbs
WSP-Q40GLR4L Use Case
Data Center Campus Spine-Leaf Connectivity with 40G LR4 Lite
In a multi-hall data center campus, deploying WSP-Q40GLR4L-QSFP LR4 Lite modules on spine and leaf switches enables seamless 40G Ethernet links over existing single-mode fiber up to 2 km. This solution delivers high-bandwidth, low-latency interconnects, simplifies network architecture, and ensures scalable performance for virtualization, storage, and cloud services.
5G RAN Backhaul Link for Centralized and Distributed Units
Mobile operators use WSP-Q40GLR4L-QSFP 40G LR4 Lite transceivers to bridge Centralized Units (CU) and Distributed Units (DU) in 5G RAN over 2 km fiber runs. The module ensures reliable, low-jitter 40G Ethernet backhaul, supports massive mobile broadband aggregation, and meets strict latency SLAs for enhanced user experience.
High-Performance Computing Cluster Interconnect
Research institutions and enterprises connect GPU/CPU compute nodes to parallel storage arrays using WSP-Q40GLR4L-QSFP LR4 Lite over 2 km SMF links. This high-throughput 40G Ethernet solution accelerates large dataset transfers for AI/ML workloads, maximizes cluster utilization, and reduces time-to-insight in data-intensive applications.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| WSP-Q40GLR4L |  QSFP-4SFP10G-CU4M= |  QSFP-4X10G-AOC1M= |  QSFP-4X10G-AOC10M= |  QSFP-H40G-AOC2M | |
|---|---|---|---|---|---|
| Product Type | Transceiver | Direct Attach Copper Cable (DAC) | Transceiver | Transceiver | Transceiver |
| Form Factor | QSFP+ | QSFP+ to 4x SFP+ | QSFP | QSFP | QSFP |
| Data Rate | 40G | 10G | 40G (4x10G) | 40G (4x10G) | 40G |
| Connector Type | LC | QSFP+ and SFP+ | Integrated Fiber-Optic | Direct Attach | QSFP Direct Attach |
| Wavelength | 1271/1291/1311/1331 nm | N/A | 850nm | N/A | 850nm |
| Transmission Distance | Long-Range | Short-Range | Short-Range | Short-Range | Short-Range |
| Fiber Type | Single-mode | N/A | Multi-mode | N/A | Multi-mode |
| Max Distance | 10 km | 4 meters | 1 m | 10 meters | 2 meters |
| Supported Protocols | Ethernet | Ethernet | Ethernet | Ethernet | Ethernet |
| Network Interface | Fiber | Copper | Fiber | Ethernet | Ethernet |
| Power Consumption | 4.8W | N/A | 2.5W | N/A | N/A |
| Operating Temperature | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C |
| Storage Temperature | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C |
| Input Voltage | 3.3V | N/A | 3.3V | N/A | 3.3V |
| Compatibility | Cisco / Juniper / Huawei / Arista | Cisco / Juniper / Huawei / Arista | Cisco / Juniper / Huawei / Arista | N/A | Cisco / Juniper / Huawei / Arista |
| Product Name | WSP-Q40GLR4L | QSFP-4SFP10G-CU4M= | QSFP-4X10G-AOC1M= | QSFP-4X10G-AOC10M= | QSFP-H40G-AOC2M |
| Height | 0.54 inches | N/A | N/A | N/A | N/A |
| Width | 0.54 inches | N/A | N/A | N/A | N/A |
| Depth | 1.8 inches | N/A | N/A | N/A | N/A |
| Weight | 0.2 lbs | N/A | N/A | N/A | N/A |
Reviews & Ratings
J
Julian Hayes
5
Durable build with professional-grade reliability.
N
Naomi Foster
4
Ideal for long-range campus and data center connections.
E
Ezekiel Ward
5
Minimal latency and stable operation under load.
F
Fiona Pierce
4
Excellent performance for extended-range optical deployments.
Questions & Answers
What is the WSP-Q40GLR4L QSFP 40G Ethernet transceiver?
The WSP-Q40GLR4L is a QSFP+ 40 Gigabit Ethernet LR4 Lite transceiver module with LC duplex connectors, designed for long‐reach single‐mode fiber links up to 2 km.
Which connector and fiber type does the WSP-Q40GLR4L use?
The module uses LC duplex connectors and operates over single-mode fiber (SMF) for reliable 40 Gbps transmission.
What maximum link distance does the QSFP 40G LR4 Lite support?
The WSP-Q40GLR4L supports single-mode fiber links up to 2 km at 40 Gbps data rate.
What are the optical wavelengths supported by this LR4 Lite transceiver?
It transmits on four CWDM wavelengths around 1271 nm, 1291 nm, 1311 nm, and 1331 nm, each carrying 10 Gbps.
Is the WSP-Q40GLR4L compliant with industry standards?
Yes, it is fully compliant with the QSFP+ MSA and IEEE 802.3ba 40GBASE-LR4 Lite specifications.
Does this module support digital diagnostics monitoring?
Yes, it features a digital diagnostic monitoring interface (DDM) per SFF-8436 for real-time link performance.
What is the operating temperature range of the WSP-Q40GLR4L?
It operates reliably between 0 °C and 70 °C (standard temperature range) for data center and campus environments.
How much power does the QSFP 40G LR4 Lite consume?
Typical power consumption is less than 2.5 W, ensuring efficient operation in high-density switch ports.
Is the WSP-Q40GLR4L hot-swappable in network equipment?
Yes, the transceiver is hot-swappable, allowing for seamless insertion or removal without powering down the switch.
Which switches and routers are compatible with this QSFP+ module?
It is interoperable with major vendor platforms from Cisco, Juniper, Arista, Dell EMC, HPE, and more that support 40G QSFP+ interfaces.
How do I install the WSP-Q40GLR4L in my network switch?
Simply insert the module into an available QSFP+ port until it clicks, then connect LC duplex fibers to the transmit and receive ports.
What typical applications are enabled by this 40 GbE LR4 Lite transceiver?
Ideal for data center uplinks, core aggregation, high-performance computing clusters, and campus backbone links up to 2 km.
Does the WSP-Q40GLR4L come with a warranty?
Yes, it includes a limited lifetime warranty covering defects in materials and workmanship under normal use.
How does LR4 Lite differ from standard LR4 transceivers?
LR4 Lite supports up to 2 km reach, while standard LR4 modules extend up to 10 km over single-mode fiber.
Can I mix LR4 Lite and SR4 modules in the same 40G network?
No, LR4 Lite uses single-mode fiber and CWDM wavelengths, whereas SR4 requires OM3/OM4 multimode fiber and parallel channels.
Where can I purchase genuine WSP-Q40GLR4L transceivers?
You can order directly from authorized distributors and certified resellers listed on the manufacturer’s website for guaranteed authenticity.