400GBASE-LR4 QSFP-DD Optical Transceiver, Duplex LC, 1310nm, 10km over SMF, PAM4, DOM

1. PAM4 modulation technology.
2. CWDM EML + PIN, Duplex LC connector.
3. Low power consumption ≤12W.
4. 400GAUI-8/CEI-56G- VSR- PAM4, four CWDM optical lanes
5. Applied in 400G Ethernet, Infiniband interconnects, DCI, etc.

1. 400G Ethernet IEEE 802.3bs, 100G Lambda MSA
2. Data Center Interconnect

Part Number 6C-QSFP-DD-LR4 Vendor Name 6COM
Form Factor QSFP-DD Interface Type LR4
Max Data Rate 425Gbps (4×106.25Gb/s) Wavelength 1270nm,1290nm,1310nm,1330nm
Connector Duplex LC Cable Type SMF
Max Cable Distance 10km Modulation PAM4
TX Power -2.8~4.0dBm Receiver Sensitivity <-9.1dBm
Transmitter Type CWDM EML Receiver Type PIN
Power Consumption ≤12W Temperature Range 0 to 70°C (32 to 158°F)
DDM/DOM Supported Forward Error Correction (FEC) Host FEC Supported
Protocols IEEE 802.3bs, QSFP-DD MSA CMIS Rev4.1, OIF 56G PAM4 and 100G Lambda MSA Warranty 2 Years

6COM: Safeguarding Quality with Our Exclusive Part Tracking and Serialization Process.


                      OEM Code Testing                                                                                Lab Testing                                                                                     Quality Control            

      Every product is meticulously custom-coded                       Our laboratory boasts state-of-the-art testing equipment                           Every product has undergone                 

         to ensure compatibility with all features.              ensuring peak performance and unwavering reliability for every product.               Full Quality Control process        

To attain optimal product quality, 6COM adheres to a rigorous quality control protocol. Each product undergoes a comprehensive testing procedure, involving a series of tests before shipment. Our state-of-the-art testing facilities employ cutting-edge equipment to simulate various real-world scenarios, accommodating customized usage scenarios for any product. We furnish individual test reports for each product. Reach out to us for access to our Comprehensive Test Bed, featuring compatibility checks with modules from major switch brands.

6COM Production Line 6COM Protocol

Cisco Mellanox Arista Juniper Generic
QDD-400G-LR4-S MMS1V90-WR QDD-400G-LR4 QDD-400G-LR4-10 QDD-400G-LR4

CompatibilityTest for 6C-QSFP-DD-LR4

Reliable manufacturer and seller of optical network products

What Can 6COM Bring to You

Industry-leading after-sales processing capabilities

6COM has been in this business for 12 years. We have rich experience in dealing with various problems, you can rest assured to buy products at 6com without worrying about after-sales problems.

The most competitive purchase cost in the industry

6COM's excellent production management model makes the module price at the bottom of the industry in the market. You can get the best quality products at budget.

Various swtiches for compatibility testing

Since 2010, 6com has purchased more than 140+ network switches, covering popular equipment of 10G/40G/100G brands.

Rigorous performance testing

Eye diagram test, waveform test, bit error test and other tests ensure the stability of the module


Interoperability Matrix