United States$5,000,000+
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A
Adrian Rowe
5
Stable 10km LR4 module with consistent 40G throughput. Ideal for campus and enterprise deployments.
QSFP-40G-LR4=
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40GBASE-LR4= QSFP OTN LC 10KM TRANSCEIVER
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QSFP-40G-LR4=
- Description:
- 40GBASE-LR4= QSFP OTN LC 10KM TRANSCEIVER
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In stock - Ready to Ship
- Brand:
- Cisco
- GTIN:
- 724696899648
- Condition:
- Warranty:
- 3
- List Price:
$17,691.00
- Price:
$454.0097.4% off
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1
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QSFP-40G-LR4= Overview
QSFP-40G-LR4= is a QSFP transceiver designed to support a 40G data rate, offering long-range transmission capabilities over single-mode fiber. It features LC connectors and is optimized for long-range Ethernet applications in data centers, enterprise networks, and telecom environments with standardized physical dimensions and a compact form factor.
QSFP-40G-LR4= meets stringent network requirements by supporting Ethernet protocols over four individually modulated 10G channels, ensuring robust performance for high-speed connectivity over distances of up to 10 km. Its reliable design and compatibility with major networking vendors make it an ideal solution for modern, high-performance optical networking needs.
QSFP-40G-LR4= price is $454.00, a 97.4% saving from the Cisco list price of $17,691.00. QSFP-40G-LR4= is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for QSFP-40G-LR4= for additional pricing. Browse the full 40G Base Modules series or explore all Cisco products.
QSFP-40G-LR4= Specifications
- Product Type
- Transceiver
- Form Factor
- QSFP
- Data Rate
- 40G
- Connector Type
- LC
- Wavelength
- 1310 nm
- Transmission Distance
- Long-Range
- Fiber Type
- Single-mode
- Max Distance
- 10 km
- Supported Protocols
- Ethernet
- Network Interface
- Fiber
- Power Consumption
- 3.2W
- Operating Temperature
- 0 to 70°C
- Storage Temperature
- -40 to 85°C
- Input Voltage
- 3.3V
- Compatibility
- Cisco, Juniper, Huawei, Arista
- Product Name
- QSFP-40G-LR4=
- Height
- N/A
- Width
- N/A
- Depth
- N/A
- Weight
- N/A
QSFP-40G-LR4= Use Case
Enterprise Data Center Interconnect with QSFP-40G-LR4 40GBASE-LR4 Transceiver
In a multi-campus enterprise environment, network engineers deploy the QSFP-40G-LR4 QSFP OTN LC 10KM Transceiver to link two data centers over single-mode fiber up to 10 km. This solution delivers 40 Gbps of high-speed bandwidth, reduces latency by 30%, and supports seamless virtualization and cloud migrations—ensuring reliable, scalable inter-site connectivity.
5G Mobile Backhaul Over OTN Using QSFP-40G-LR4 QSFP Transceiver
A telecom operator integrates the QSFP-40G-LR4 40GBASE-LR4 module into its metro OTN transport to aggregate 5G base station traffic across a 10 km fiber span. The transceiver’s OTN framing enhances fault isolation and bandwidth efficiency, enabling carrier-grade uptime, ultra-low latency, and simplified maintenance for backhaul of high-density mobile data.
Uncompressed UHD Video Contribution with QSFP-40G-LR4 LC 10KM Transceiver
A broadcast network uses the QSFP-40G-LR4 QSFP OTN LC 10KM Transceiver for live 4K/8K IP contribution between a remote production truck and central facility across 8 km of single-mode fiber. The 40 Gbps link supports SMPTE 2110 uncompressed streams, eliminates frame drops, and guarantees synchronized audio/video delivery—streamlining real-time production workflows.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| QSFP-40G-LR4= |  QSFP-H40G-AOC2M |  QSFP-4X10G-AOC3M |  CVR-4SFP10G-QSFP= |  QSFP-4X10G-LR-S= | |
|---|---|---|---|---|---|
| Compatibility | Cisco, Juniper, Huawei, Arista | Cisco / Juniper / Huawei / Arista | N/A | Cisco, Juniper, Huawei, Arista | Cisco / Juniper / Huawei / Arista |
| Connector Type | LC | QSFP Direct Attach | QSFP | LC | LC |
| Data Rate | 40G | 40G | 40G (4x10G) | 10G | 10G |
| Depth | N/A | N/A | N/A | 3.7 inches | 0.85 inches |
| Fiber Type | Single-mode | Multi-mode | Multi-mode | Multi-mode | Single-mode |
| Form Factor | QSFP | QSFP | QSFP | QSFP+ | QSFP |
| Height | N/A | N/A | N/A | 0.7 inches | 0.27 inches |
| Input Voltage | 3.3V | 3.3V | N/A | 3.3V | 3.3V |
| Max Distance | 10 km | 2 meters | 3 m | 300 meters | 10 km |
| Network Interface | Fiber | Ethernet | Ethernet | Fiber | Ethernet |
| Operating Temperature | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C |
| Power Consumption | 3.2W | N/A | N/A | 3.5 W | 3.5 W |
| Product Name | QSFP-40G-LR4= | QSFP-H40G-AOC2M | QSFP-4X10G-AOC3M | CVR-4SFP10G-QSFP= | QSFP-4X10G-LR-S= |
| Product Type | Transceiver | Transceiver | Transceiver | Transceiver | Transceiver |
| Storage Temperature | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C |
| Supported Protocols | Ethernet | Ethernet | Ethernet | Ethernet | Ethernet |
| Transmission Distance | Long-Range | Short-Range | Short-Range | Short-Range | Long-Range |
| Wavelength | 1310 nm | 850nm | 850 nm | 850 nm | 1310 nm |
| Weight | N/A | N/A | N/A | 0.3 lbs | 0.10 lbs |
| Width | N/A | N/A | N/A | 2.2 inches | 0.66 inches |
Reviews & Ratings
S
Sabrina Holt
4
Reliable single-mode transceiver. Easy plug-and-play integration.
Q
Quentin Nash
4
Excellent performance with low error rates over long links.
F
Fiona Pritchard
4
Durable module built for high-demand environments. Minimal latency.
V
Victor Lang
4
Professional-grade transceiver with consistent throughput and reliability.
Questions & Answers
What is the QSFP-40G-LR4= transceiver?
The QSFP-40G-LR4= is a 40GBASE-LR4 QSFP+ OTN transceiver that supports single-mode fiber links up to 10 km via an LC duplex connector.
Which fiber type does the 40GBASE-LR4= QSFP OTN module support?
The QSFP-40G-LR4= supports single-mode fiber (SMF) for distances up to 10 km when used with standard ITU-T G.652 compliant cable.
What is the maximum transmission distance of the QSFP-40G-LR4=?
This 40GBASE-LR4 module reliably reaches up to 10 km over single-mode fiber under standard operating conditions.
Which connector type is used by the QSFP-40G-LR4=?
It uses a duplex LC connector interface to ensure secure, low-loss optical connections in 40 GbE and OTN deployments.
Is the QSFP-40G-LR4= MSA compliant?
Yes, the QSFP-40G-LR4= adheres to the QSFP+ MSA and IEEE 802.3ba 40GBASE-LR4 specifications for guaranteed interoperability.
What applications is the 40GBASE-LR4= transceiver suited for?
It is ideal for data center interconnects, metro Ethernet, OTN aggregation, and high-speed backbone links requiring 10 km reach.
Is the QSFP-40G-LR4= hot-swappable?
Yes, this QSFP+ OTN module can be inserted or removed without powering down the host device, ensuring zero network interruption.
What is the operating wavelength of the QSFP-40G-LR4=?
The module transmits over four wavelengths at 1310 nm per channel, multiplexed to deliver a total data rate of 40 Gbps.
What is the typical power consumption of the QSFP-40G-LR4=?
Typical power consumption is ≤3.5 W, meeting IEEE and MSA power budgets for high-density 40 GbE deployments.
Which devices are compatible with the QSFP-40G-LR4=?
It works with any QSFP+ slot on switches, routers and OTN equipment that support MSA-compliant 40GBASE-LR4 optics.
Does the QSFP-40G-LR4= support digital diagnostics monitoring (DDM)?
Yes, it features SFF-8436-compliant DDM for real-time optical power, temperature, voltage and laser bias current monitoring.
Can I use this module in OTN networks?
Absolutely. The QSFP-40G-LR4= is OTN-ready and supports proper framing for OTN, Ethernet and Fibre Channel applications.
What temperature range does the QSFP-40G-LR4= support?
Operating temperature range is 0 °C to 70 °C (32 °F to 158 °F) for standard commercial environments.
How do I install the QSFP-40G-LR4= transceiver?
Align the module with the host port, gently insert until it latches, and verify link-up via the device LEDs or management interface.
How do I clean the LC connectors on this transceiver?
Use a lint-free fiber swab or cassette cleaner with isopropyl alcohol to remove dust, then let connectors dry before re-insertion.
What is the bit error rate (BER) performance of the 40GBASE-LR4= module?
The QSFP-40G-LR4= guarantees a BER better than 1×10⁻¹² over its full rated reach of 10 km.