Cisco Compatible QSFP-40G-ER4 QSFP Module

# Key Highlights
  • Type: QSFP ER4
  • Compatibility: Cisco Compatible
  • Tx/Rx Wavelength: 1310 nm. / 1310 nm.
  • Media Type: Double Fiber Single-Mode Fiber (SMF.)
  • Optical Budget: 16.3 dB
  • Max. Distance: 40 km
  • Data Rate: 39.81-44.8 Gbps
  • Temperature: Standard 0°-70°C
# Pricing & Ordering


Standard recommended retail price without VAT.

Lead Time: Below 1 Week in EU Countries
# 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:

Single-Mode Fiber (SMF)

TX Wavelength:

1310 nm.

Transceiver Type:


RX Wavelength:

1310 nm.

Minimum Optical Budget:

16.3 dB

Maximum Distance:


Supported Data Rate:

39.81 – 44.8 Gbps

Supported Applications:

40G Ethernet (41.25Gbps), STM-256 (39.81 Gbps), OTU3 (43.01Gbps), OTU3e2 (44.58Gbps)



Temperature Range:

Standard 0°-70°C


Double LC

Tx Wavelength Bandwidth:

4 WDM Seperated 1310nm Lanes (13 nm (1271, 1291, 1311, 1331))

Rx Wavelength Bandwidth:

4 WDM Seperated 1310nm Lanes (13nm (1271, 1291, 1311, 1331))

Minimum Transmitting Power:

Each Lane -2.7 dB

Maximum Transmitting Power:

Each Lane 4.5 dB

Receiver Sensitivity:

Each Lane -19 dB

Receiver Overload:

Each Lane -7 dB

Transmitter Type:

DFB Laser

Receiver Type:

APD Photodiode




+3.3V single power supply


802.3ba 40GBASE-ER4, CE, Class 1 FDA and IEC60825-1 Laser Safety Compliant, INF-8438i, QSFP+ MSA, RoHS, SFF-8436

# Product Documentation
Compatible Cisco 40G Compatibility Matrix - EDGE 40G-QSFP-40

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

# Product Description

    Our Compatible Cisco 40G Compatibility Matrix & Datasheet is based on our product 40G-QSFP-2, which has the same specifications and is manufactured in accordance with the same industry standards. The Cisco QSFP 40G ER4 compatible module is operating over pair of singlemode optical fiber providing four independent optical communication lanes seperated from each other using WDM technology. It has a minimum guaranteed optical budget of 16.3 dB, which in most cases is enough to reach 40 km distance using single-mode cable as per Cisco 40G QSFP 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 industry. Our Cisco QSFP 40G ER4 module version uses a high-quality 4 x DFB transmitting lasers and 4 x APD 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 40G Compatibility Matrix 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 Cisco QSFP 40G ER4 module is a multi-purpose module that can be used in a variety of networking applications. Consequently, most popular applications are Internet Service Provider, Fiber to The Home routing and switching equipment with Cisco 40G QSFP Datasheet interfaces, Mobile Operator Core and Backhaul applications, Data Center networking for Ethernet connections and other optical fiber links. Our Cisco 40G QSFP Datasheet compatible transceiver has proven to be reliable in temperature-controlled server rooms over a long period of time. Compatible Cisco QSFP 40G ER4 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 – leading to best performance!

    Our Cisco 40G Compatibility Matrix and price are based on our product 40G-QSFP-2, which is CE/RoHS certified and fulfills product safety standards. We perform compatibility tests for compatible Cisco QSFP 40G ER4 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!