QSFP-40G-LR4-S Cisco Compatible 40G 10KM SMF QSFP module

# Key Highlights
  • Type: QSFP+ (Quad Small Form-factor Pluggable)
  • Compatibility: Cisco 40GBASE-LR4 QSFP+ compatible
  • Tx/Rx Wavelength: 1310 nm / 1310 nm
  • Connector Type: LC (UPC)
  • Media Type: Single-Mode Fiber (SMF)
  • Cable Type: Duplex Fiber
  • Optical Budget: 9.7 dB
  • Max. Distance: 10 km
  • Data Rate: 39.81-44.8 Gbps
  • Temperature:Standard 0°-70°C
# Pricing & Ordering


Standard recommended retail price without VAT.

Lead Time: Next Business Day from Order Confirmation
# Quality Assurance

Because of our comprehensive Testing Program, we are confident on quality of our products. Such approach empower us to cover all our products with:

# Key Technical Data
Media Type:

TX Wavelength:

Transceiver Type:

RX Wavelength:

Minimum Optical Budget:

Maximum Distance:

Supported Data Rate:

Supported Applications:

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Tx Wavelength Bandwidth:

Rx Wavelength Bandwidth:

Minimum Transmitting Power:

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# Product Documentation
Compatible Cisco QSFP-40G-LR4-S Datasheet

Our Compatible Cisco QSFP-40G-LR4-S Module is based on our product 40G-QSFP-10. When You will order it will be encoded to be compatible with Cisco equipment and it will be labeled with part number: 40G-QSFP-10-CI, where CI means Cisco Compatible. Above You can download datasheet of our 40G-QSFP-10 product.

# Product Description

    Our Cisco Compatible QSFP-40G-LR4-S Price & Datasheet is based on our product 40G-QSFP-10, which has the same specifications and is manufactured in accordance with the same industry standards. The Cisco QSFP-40G-LR4-S Compatibility matrix states that the module is operating over pair of single-mode optical fibers providing four independent optical communication lanes separated from each other using WDM technology. It has a minimum guaranteed optical budget of 9.7 dB, which in most cases is enough to reach a 10 km distance using single-mode cable as per QSFP-40G-LR4-S Datasheet specification. However, distance is only an indicative parameter calculated for identification comfort. Finally, we calculate distance while keeping in mind the minimum optical budget and the average attenuation of optical cabling in the industry. Our Cisco QSFP-40G-LR4-S module version uses high-quality 4 x DFB transmitting lasers and 4 x PIN receivers operating each lane with speeds of 11.2 Gbps, giving an aggregated maximum bandwidth of 44.8 Gbps. DDM/DOM optical diagnostics are supported by this module, which provides diagnostic information about the current operating conditions. Digital diagnostics functions are available via a 2-wire serial interface, as specified in SFF-8472. The compatible Cisco QSFP-40G-LR4-S module has a double LC connector and operates in the Standard 0°-70°C temperature range. This QSFP module supports data rates ranging from 39.81 – 44.8 Gbps data rates and such applications as 40G Ethernet (41.25 Gbps), STM256 (39.81 Gbps), OTU3 (43.108 Gbps) and OTU3e2 (44.58 Gbps). Our QSFP-40G-LR4-S module is a multi-purpose module that can be used in a variety of networking applications. Consequently, the most popular applications are Internet Service Providers, Fiber to Home routing and switching equipment with QSFP-40G-LR4-S Datasheet interfaces, Mobile Operator Core and Backhaul applications, Data Center networking for Ethernet connections, and other optical fiber links. Our Cisco QSFP 40G LR4 VS QSFP 40G LR4 S compatible transceiver has proven to be reliable in temperature-controlled server rooms over a long period of time. Cisco-compatible QSFP-40G-LR4-S Datasheet transceivers do not require any maintenance while in use. The only possible maintenance requirement could occur during cable replacement when the transceiver connector must be thoroughly cleaned of dust using special optical connector cleaning tools. Therefore, ensuring the best connection possible – leads to the best performance!

    Our Cisco QSFP-40G-LR4-S Price and Datasheet are based on our product 40G-QSFP-10, which is CE/RoHS certified and fulfills product safety standards. We perform compatibility tests for compatible Cisco QSFP-40G-LR4-S Module with the most recent Cisco networking equipment platforms, allowing us to encode transceiver EEPROM memory to be compatible with and work seamlessly with Cisco platforms. Furthermore, our optical transceivers comply with the QSFP Multi Source Agreement industry-standard SFF-8436. Because we are committed to providing high-quality service, we conduct rigorous quality checks before delivering our products. As a result, we perform optical parameter measurements, connector cleanness tests, and EEPROM memory data validation tests on QSFP transceivers. Please contact us if you require any additional information Contact Us!


Where can I find QSFP-40G-LR4-S datasheet?

For Cisco QSFP-40G-LR4-S Datasheet you should refer to the Cisco website, Cisco QSFP+ Modules section,however, feel free to check our compatible Cisco QSFP-40G-LR4-S datasheet pdf as well.

What is the Cisco QSFP-40G-LR4-S price?

For the original Cisco Cisco QSFP-40G-LR4-S please refer to Cisco Global Price List, however, our compatible product price is €105.11.

QSFP-40G-LR4-S vs 40GBASE-LR4 - what is the difference?

The main details are the same -40GBASE-LR4, 1310 nm, SMF, but 40GBASE-LR4 supports OTU3 data rate.

Where I find the QSFP-40G-LR4-S Compatibility matrix?

Cisco Compatibility matrix can be found Here, however, if You have any questions about our item’s compatibility, please do not hesitate to contact Us!