The 400GBASE-FR4 module, Duplex LC connector, up to 2km over parallel single-mode fiber. It is compliant to IEEE 802.3bs, 400GBASE-FR4 Spec of 100G Lambda MSA group, and 400GAUI-8/CEI-56G-VSR-PAM4 standards.
The 400 Gigabit Ethernet signal is carried over four CWDM grid optical wavelengths. Multiplexing and demultiplexing of the four wavelengths are managed within the device.

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Cisco QDD-400G-FR4-S Compatible 400GBASE-FR4 QSFP-DD PAM4 1310nm 2km DOM Duplex LC SMF Optical Transceiver Module
Hot #105875
Hot #105875
£843.00 exc. VAT
FS P/N: QSFPDD-FR4-400G£1,011.60 inc. VAT
FS P/N: QSFPDD-FR4-400G
745 Sold
17 Reviews
18 Questions
Transceiver Models:
119 In Global Warehouse, Get It By 19 Dec 2023
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Deliver to London, E15 2PP
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Cisco QDD-400G-FR4-S Compatible 400GBASE-FR4 QSFP-DD PAM4 1310nm 2km DOM Optical Transceiver Module (SMF, 1310nm, 2km, LC, DOM)
Specifications
Cisco Compatible
QDD-400G-FR4-S
Vendor Name
FS
Form Factor
QSFP-DD
Max Data Rate
400Gbps
Wavelength
1271nm,1291nm,1311nm,1331nm
Max Cable Distance
2km
Connector
Duplex LC (UPC)
Media
SMF
Transmitter Type
CWDM EML
Receiver Type
PIN
TX Power
-3.3~3.5dBm
RX Power
-7.3~3.5dBm
Powerbudget
4dB
Modulation
8x 50G PAM4
Power Consumption
≤ 10W
Extinction Ratio
3.5dB
DDM/DOM
Supported
Commercial Temperature Range
0 to 70°C (32 to 158°F)
DSP
TX and RX
Inbuilt FEC
No
Core Size
G.652/9um
Packaging Technology
COB
Protocols
IEEE 802.3bs, QSFP-DD MSA, CMIS 4.1
Warranty
5 Years
Quality Testing Program
Quality Testing Program

Optical Transceivers Testing Learn more
Quality Certifications
To get the detailed certification, please go to the Product Compliance Status for download.
Please Note: Installing a third party transceiver does not void your network equipment warranty. Network equipment manufacturers all have guidelines stating that warranty support on their products will not be affected.
Connectivity Solutions
Leaf-spine Connections

400G Connectivity with Direct Connect Cabling

See more
Leaf-spine Connections

400G Connectivity with Direct Connect Cabling

400G to 800G Migration

400G Structured Cabling Connections

Features
Leading Performance and Quality for 400G
Built-in Inphi 7nm DSP Chip, the QSFP-DD transceiver offers high-speed, and low-power in 400G links.
Inphi 7nm DSP Chip
Stable Transmission
≤10W
Low Power Consumption
53G EML Laser
Ensure Production
Tested in Host Devices for Proven Interoperability
Every unit is quality tested for compatibility in the targeted switch environment, which guarantees flawless operations.

Comprehensive Testing Increases Reliability
Qualified through a rigorous process with advanced equipments to ensure you get the high quality and reliable optics.
Optical Spectrum Test
No Packet Loss & CRC
TDECQ Test
1.68dB
Bit Error Rate Test
BER 2.4E-4
Temperature Test
0~70°C
Enable Seamless Connectivity for Your Network
Reconfiguring the transceiver to work with different brands, FS BOX offers flexibility in stock costs.
Center Wavelength | 1310nm | 850nm | 850nm | 1310nm | 1310nm | 1310nm |
Connector | Duplex LC | MTP/MPO-16 | MTP/MPO-16 | MTP/MPO-8 MTP/MPO-12(8 of the 12 Fibers Used) | MTP/MPO-8 MTP/MPO-12(8 of the 12 Fibers Used) | MTP/MPO-8 MTP/MPO-12(8 of the 12 Fibers Used) |
Cable Distance (Max.) | 2km@SMF | 100m@MMF | 70m/100m@MMF | 500m@SMF | 500m@SMF | 2km@SMF |
Modulation | 8x 50G PAM4 | 8x 50G PAM4 | 8x 50G PAM4 | 8x 50G PAM4 | 8x 50G PAM4 | 8x 50G PAM4 |
DSP | Inphi DSP | Inphi DSP | Inphi DSP | Broadcom 7nm DSP | Broadcom 7nm DSP | Inphi DSP |
Power Consumption | ≤10W | ≤10W | ≤10W | ≤10W | ≤10W | ≤10W |
Transmitter Type | CWDM EML | VCSEL | VCSEL | DFB | DFB | EML |
Packaging Technology | COB | COB | COB | COB | COB | COB |
Protocols | QSFP-DD MSA, CMIS Rev4.1, OIF 56G PAM4, 100G Lambda MSA, IEEE 802.3bs | OSFP MSA, CMIS Rev4.1, OIF 56G PAM4, IEEE 802.3bs | QSFP-DD MSA, CMIS Rev5.0, OIF 56G PAM4, IEEE 802.3cd | QSFP-DD MSA, CMIS Rev4.1, OIF 56G PAM4, 100G Lambda MSA, IEEE 802.3bs | OSFP MSA, CMIS 4.0, IEEE 802.3bs | QSFP-DD MSA, CMIS Rev4.1, OIF 56G PAM4, 100G Lambda MSA, IEEE 802.3bs |
Application | Data Center | Data Center 400G to 8x50G Breakout | Data Center 400G to 8x50G Breakout | Data Center 800G to 2x400G Breakout 400G to 4x100G Breakout | Data Center 800G to 2x400G Breakout 400G to 4x100G Breakout | Data Center |
Videos
Specifications
Cisco QDD-400G-FR4-S Compatible 400GBASE-FR4 QSFP-DD PAM4 1310nm 2km DOM Optical Transceiver Module (SMF, 1310nm, 2km, LC, DOM)
The 400GBASE-FR4 module, Duplex LC connector, up to 2km over parallel single-mode fiber. It is compliant to IEEE 802.3bs, 400GBASE-FR4 Spec of 100G Lambda MSA group, and 400GAUI-8/CEI-56G-VSR-PAM4 standards.
The 400 Gigabit Ethernet signal is carried over four CWDM grid optical wavelengths. Multiplexing and demultiplexing of the four wavelengths are managed within the device.
Specifications
Cisco Compatible
QDD-400G-FR4-S
Vendor Name
FS
Form Factor
QSFP-DD
Max Data Rate
400Gbps
Wavelength
1271nm,1291nm,1311nm,1331nm
Max Cable Distance
2km
Connector
Duplex LC (UPC)
Media
SMF
Transmitter Type
CWDM EML
Receiver Type
PIN
TX Power
-3.3~3.5dBm
RX Power
-7.3~3.5dBm
Powerbudget
4dB
Modulation
8x 50G PAM4
Power Consumption
≤ 10W
Extinction Ratio
3.5dB
DDM/DOM
Supported
Commercial Temperature Range
0 to 70°C (32 to 158°F)
DSP
TX and RX
Inbuilt FEC
No
Core Size
G.652/9um
Packaging Technology
COB
Protocols
IEEE 802.3bs, QSFP-DD MSA, CMIS 4.1
Warranty
5 Years
Quality Testing Program
Quality Testing Program

Optical Transceivers Testing Learn more
Quality Certifications
To get the detailed certification, please go to the Product Compliance Status for download.
Please Note: Installing a third party transceiver does not void your network equipment warranty. Network equipment manufacturers all have guidelines stating that warranty support on their products will not be affected.
Connectivity Solutions
Leaf-spine Connections

400G Connectivity with Direct Connect Cabling

See more
Leaf-spine Connections

400G Connectivity with Direct Connect Cabling

400G to 800G Migration

400G Structured Cabling Connections

Features
Leading Performance and Quality for 400G
Built-in Inphi 7nm DSP Chip, the QSFP-DD transceiver offers high-speed, and low-power in 400G links.
Inphi 7nm DSP Chip
Stable Transmission
≤10W
Low Power Consumption
53G EML Laser
Ensure Production
Tested in Host Devices for Proven Interoperability
Every unit is quality tested for compatibility in the targeted switch environment, which guarantees flawless operations.

Comprehensive Testing Increases Reliability
Qualified through a rigorous process with advanced equipments to ensure you get the high quality and reliable optics.
Optical Spectrum Test
No Packet Loss & CRC
TDECQ Test
1.68dB
Bit Error Rate Test
BER 2.4E-4
Temperature Test
0~70°C
Enable Seamless Connectivity for Your Network
Reconfiguring the transceiver to work with different brands, FS BOX offers flexibility in stock costs.
Center Wavelength | 1310nm | 850nm | 850nm | 1310nm | 1310nm | 1310nm |
Connector | Duplex LC | MTP/MPO-16 | MTP/MPO-16 | MTP/MPO-8 MTP/MPO-12(8 of the 12 Fibers Used) | MTP/MPO-8 MTP/MPO-12(8 of the 12 Fibers Used) | MTP/MPO-8 MTP/MPO-12(8 of the 12 Fibers Used) |
Cable Distance (Max.) | 2km@SMF | 100m@MMF | 70m/100m@MMF | 500m@SMF | 500m@SMF | 2km@SMF |
Modulation | 8x 50G PAM4 | 8x 50G PAM4 | 8x 50G PAM4 | 8x 50G PAM4 | 8x 50G PAM4 | 8x 50G PAM4 |
DSP | Inphi DSP | Inphi DSP | Inphi DSP | Broadcom 7nm DSP | Broadcom 7nm DSP | Inphi DSP |
Power Consumption | ≤10W | ≤10W | ≤10W | ≤10W | ≤10W | ≤10W |
Transmitter Type | CWDM EML | VCSEL | VCSEL | DFB | DFB | EML |
Packaging Technology | COB | COB | COB | COB | COB | COB |
Protocols | QSFP-DD MSA, CMIS Rev4.1, OIF 56G PAM4, 100G Lambda MSA, IEEE 802.3bs | OSFP MSA, CMIS Rev4.1, OIF 56G PAM4, IEEE 802.3bs | QSFP-DD MSA, CMIS Rev5.0, OIF 56G PAM4, IEEE 802.3cd | QSFP-DD MSA, CMIS Rev4.1, OIF 56G PAM4, 100G Lambda MSA, IEEE 802.3bs | OSFP MSA, CMIS 4.0, IEEE 802.3bs | QSFP-DD MSA, CMIS Rev4.1, OIF 56G PAM4, 100G Lambda MSA, IEEE 802.3bs |
Application | Data Center | Data Center 400G to 8x50G Breakout | Data Center 400G to 8x50G Breakout | Data Center 800G to 2x400G Breakout 400G to 4x100G Breakout | Data Center 800G to 2x400G Breakout 400G to 4x100G Breakout | Data Center |
Videos
Questions & Answers
All (18)Connectors (2)Dell Series (1)Nexus Series (1)Optical Signal (1)PAM4 (1)Ports (1)Power Consumption (1)Product Comparison (1)Specification (1)Transmission Distance (1)
Customer Reviews
H***z
Australia
20 Oct 2023
Every Module works fine without any error.
Verified Purchase
Helpful 1
Comment 0w***r
Singapore
19 Oct 2023
The connect does look good. We appreciate your ability to get what we need and how capable your company is.
Verified Purchase
Helpful 2
Comment 0R***d
Australia
13 Jun 2023
Wow, thank you so much! Your customer service has been simply the best from the beginning!
Verified Purchase
Helpful 0
Comment 0See all reviews
Resources
£843.00 exc. VAT
£1,011.60 inc. VAT
119 In Global Warehouse