Do I need to turn on the FEC to use this 400G splitter DAC cable？

Yes, the PAM4 modulation technique, while providing higher data rates, also brings higher error rates and sensitivity to noise.So FEC is turned on to ensure data integrity and reliability during high-speed transmissions.

What is the modulation method of the O2Q56-400G-CU1FH cable?

The OSFP side support 8x50G-PAM4 modulation(2x200G/HDR) and the QSFP56 splitter side support 4x50G-PAM4 modulation (200G/HDR).

1.5m (5ft) 400G OSFP to 2X200G QSFP56 Breakout InfiniBand NDR Passive Direct Attach Copper for Mellanox (Flat top)

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NVIDIA/Mellanox Compatible 1.5m (5ft) 400Gb/s OSFP Flat Top to 2x200Gb/s QSFP56 InfiniBand HDR Passive Copper Splitter Cable

Name: NVIDIA/Mellanox Compatible 1.5m (5ft) 400Gb/s OSFP Flat Top to 2x200Gb/s QSFP56 InfiniBand HDR Passive Copper Splitter Cable
Brand: Naddod
SKU: 102536
Price: 125.00 USD
Availability: OnlineOnly
Rating: 5.0 (18 reviews)

#102536

Model: O2Q56-400G-CUBFH

Sold: 45

In Stock: Available

$ 125.00

Cable Types:

O2Q56-400G-CUBFH

O2Q56-400G-CUBFH

Brand:

NADDOD (InfiniBand)

Length:

1.5m (5ft)

1.5m (5ft)

Item Spotlights

100% verified by the original, perfectly compatible with DGX H100 devices.
Tested for compatibility with multiple firmware versions, compliant with IBTA Industrial BER standards.
Free test environment and samples are available to experience the high-quality product performance.
Complies with OSFP MSA, CMIS 5.0, and RoHS protocols, providing a reliable and sustainable solution.
30-Day Free Return, 1-Year Free Replacement, 3-Year Warranty, Lifetime After-sales Technical Support.

NVIDIA/Mellanox Compatible 1.5m (5ft) 400Gb/s OSFP Flat Top to 2x200Gb/s QSFP56 InfiniBand HDR Passive Copper Splitter Cable

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Specifications

Applications

Questions & Answers

Resources

Specifications

Applications

Questions & Answers

Resources

Description

NVIDIA/Mellanox Compatible 1.5m (5ft) 400Gb/s OSFP Flat Top to 2x200Gb/s QSFP56 InfiniBand HDR Passive Copper Splitter Cable

NADDOD O2Q56-400G-CUBFH is a passive Direct Attach Copper (DAC) cable with an OSFP-based twin-port 2x 200Gb/s connector to two 200Gb/s QSFP56s, and is a high-speed 200Gb/s splitter cable for InfiniBand and Ethernet networking. The DAC firmware supports both InfiniBand and Ethernet and is automatically enabled depending on the protocol of the switch attached to.The 8-channel twin-port OSFP end uses a flat top form-factor for use in the Cedar-7 cards in DGX-H100 systems. The two 400G ends support 4-channels of 50G-PAM4 (200GbE/HDR) and use a flat top QSFP56 for use in Quantum switch cages.

Specifications

Form Factor

OSFP Flat Top to 2xQSFP56

Cable Length

0.5m~3m

Wire AWG

26AWG~30AWG

Commercial Temperature Range

0~70°C(32 to 158°F)

Jacket Material

LSZH

Power Consumption

<0.1W

Minimum Bend Radius

10x OD

Application

IB HDR, 200G/400G Ethernet Compliant

Applications

Questions & Answers

Ask a Question

I only use the 1st splitter of the splitter IB cable, the 2nd splitter is not installed on the switch, will it affect the use of the 1st splitter cable?

It has no effect after the port is configured with a split port, it is recognized as two logical ports inside the device, and each splitter corresponds to one logical port, which has no effect on each other.

What are the main application scenarios for the OSFP(FLT) to 2xQSFP56 splitter DAC cable?

It can be used to connect DGX-H100 Server to 200G HDR Switch.

What's the difference between O2Q56-400G-CU1FH cable and O2Q56-400G-CU1H cable?

It's mainly the heat dissipation that's different. The O2Q56-400G-CU1FH cable uses flat-top OSFP, which are mainly used on DGX H100 servers, and the O2Q56-400G-CU1H cable uses finned-top OSFP, which are mainly used on Quantum-2 switches.

Resources

O2Q56-400g-DACFH Datasheet

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