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400G QSFP-DD Direct Attach Copper Twinax DAC Cable 1m (3ft) Cisco QDD-400-CU1M

400G QSFP-DD Direct Attach Copper Twinax DAC Cable 1m (3ft) Cisco QDD-400-CU1M

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Part Number: QSFP-DD-PC01FM

Cisco QDD-400-CU1M Compatible 400G QSFP-DD DAC Twinax Cable (1-meter, Passive, QSFP-DD to QSFP-DD, 30AWG)

The 400G QSFP-DD DAC primarily enables high-bandwidth 400G links and supports 400G Ethernet rate. It provides a QSFP-DD-to-QSFP-DD copper direct-attach solution. 400G QSFP-DD DAC cables are suitable for very short links and offer a cost-effective way to establish a 400-Gigabit link between QSFP-400G ports of switches/routers within racks and across adjacent racks. F-tone currently offers passive copper cables in lengths of 0.5, 1, 1.5, 2, 2.5, and 3 meters.
Cisco Compatible QDD-400-CU1M Vendor Name F-tone
Connector Type QSFP-DD to QSFP-DD Max Data Rate 400Gbps
Minimum Bend Radius 33.5mm Wire AWG 30AWG
Cable Length 1m (3.28ft) Jacket Material PVC (OFNR)
Commercial Temperature Range 0 to 80°C (32 to 176°F)

Product Tree

Direct Connection for 400GbE QSFP-DD to QSFP-DD DAC

Quality Testing Program

Quality Certifications

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.

Test Bed

Cisco Nexus 9316D-GX

Platform Support

Cisco QDD-400-CU1M is supported on a wide range of Cisco equipment.


Cisco Nexus 9316D-GX


This product belongs to F-tone Networks' optical components product line. For detailed specifications, please contact our sales team. Thank you!
Important Notice:
Performance figures, data and any illustrative material provided in this data sheet are typical and must be specifically confirmed in writing by F-tone Networks before they become applicable to any particular order or contract. In accordance with the F-tone Networks policy of continuous improvement specifications may change without notice.
The publication of information in this data sheet does not imply freedom from patent or other protective rights of F-tone Networks or others. Further details are available from any F-tone Networks sales representative.

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Power and Wavelength Testing

Test the signal delivering strength and wavelength, to ensure the signal decoding capacity of the receiver, and the wavelength remains consistent from the transmitter to the receiver.

Power and Wavelength Testing

Traffic Testing

Test the bit error rate and packet loss rate, to make them meet the corresponding standards and ensure the performance of transceivers.

Traffic Testing

Optical Performance Testing

Test the transceivers' eye diagram situation, receiving sensitivity, extinction ratio, wavelength, light-emitting, light-receiving, current and voltage, to ensure the signal quality, stability and reliability of the transmission.

Optical Performance Testing

End Face Testing

Check the end face of the transceivers and keep them clean for more stable data transmission, better performance, and durability.

End Face Testing

Various Switch Tests

Every module is quality tested for compatibility in the multi-brand switches environment, guaranteeing flawless operations.

Various Switch Tests

About F-tone Networks

F-tone Networks is now a world leader in development of optical transceivers and provide a wide range of high-speed optical solutions for optical communication networking, especially for AI, Data Center, enterprise data networking, Industry, aerospace, mining, shipbuilding, railway, metro, long haul transport networking, and mobile access networking applications
F-tone Networks invested in foundational photonics technologies and extensive product development and engineering with global presence in many area also.

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