What is the main difference between QSFP-DD 400G FR4 and DR4?

There are two main differences: First, the optical interface is not the same, DR4 is an MPO interface, while FR4 is a duplex LC interface, in the same transmission distance under the use of FR4 is more saving fiber resources. Second, the transmission distance is not the same, FR4 has a higher sensitivity detector, the theoretical transmission is 2km, while the DR4 is only 500 meters.

What application scenarios of QSFP-DD 400G FR4 are typically used?

QDD-400G-FR4 is mainly used to interconnect the 400G QSFPDD spine switch with the spine or super spine. If the cluster scale is relatively large, the QDD-400G-FR4 may also be used to interconnect the leaf to the spine.

What kind of patch cables do I need to use with QSFP-DD 400G FR4?

QDD-400G-FR4 is a duplex LC interface, it can be used with regular single-mode fiber with LC connector.

Can QDD-400G-FR4 be used on 200G QSFP-DD ports?

No. The 400G FR4 has 4x100G PAM4 modulation, while the 200G QSFP-DD port has 8x25G NRZ modulation, which does not support PAM4, so the QDD-400G-FR4 cannot be used on the 200G QSFP-DD port.

400GBASE-FR4 QSFP-DD PAM4 1310nm 2km SMF Module for Dell

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Dell Q56DD-400G-FR4 Compatible 400GBASE-FR4 QSFP-DD PAM4 1310nm 2km DDM/DOM Duplex LC SMF Optical Transceiver Module

Name: Dell Q56DD-400G-FR4 Compatible 400GBASE-FR4 QSFP-DD PAM4 1310nm 2km DDM/DOM Duplex LC SMF Optical Transceiver Module
Brand: Naddod
SKU: 32769
Price: 649.00 USD
Availability: InStock
Rating: 5.0 (18 reviews)

#32769

Model: QDD-400G-FR4

Sold: 1294

In Stock: 17

$ 649.00

Transceiver Types:

QDD-400G-FR4

QDD-400G-FR4

Brand:

Cisco

Arista

Juniper

Dell

NVIDIA/Mellanox (Ethernet)

Generic

Cisco

Arista

Juniper

Dell

NVIDIA/Mellanox (Ethernet)

Generic

Item Spotlights

Max Power Consumption ≤12W.
Provide Professional Compatibility and Parameter Test Reports.
Compliant with Hot Pluggable QSFP-DD MSA, IEEE 802.3bs Standard.
Class1/1M Standard Product, Compliant with RoHS Environmental Protection Standards (Lead-Free).
DDM(Digital Diagnostic Monitoring) Supported.
30-Day Free Return, 1-Year Free Replacement, 3-Year Warranty, Lifetime After-sales Technical Support.

Dell Q56DD-400G-FR4 Compatible 400GBASE-FR4 QSFP-DD PAM4 1310nm 2km DDM/DOM Duplex LC SMF Optical Transceiver Module

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Specifications

Applications

Product Highlights

Questions & Answers

Customer Reviews

Resources

Specifications

Applications

Product Highlights

Questions & Answers

Customer Reviews

Resources

Description

Dell Q56DD-400G-FR4 Compatible 400G QSFP-DD FR4 PAM4 CWDM Optical Transceiver Module (CWDM SMF LC 2km DDM with FEC)

Dell Q56DD-400G-FR4 Compatible 400GBASE-FR4 is a 400Gb/s Quad Small Form Factor Pluggable Dual Density (QSFP-DD) optical transceiver that supports link lengths up to 2km via duplex LC connectors. It converts eight 50Gb/s (PAM4) electrical inputs into four CWDM optical signals and multiplexes them into a single 400Gb/s optical transmission. Conversely, on the receiver side, the module multiplexes the 400Gb/s optical input photodemultiplexing into 4-channel CWDM optical signals and converts them into 8-channel 50Gb/s (PAM4) electrical output data. The four CWDM channels have center wavelengths of 1271, 1291, 1311, and 1331 nm and are primarily used for interconnecting data centers, 400G Ethernet.

Specifications

Form Factor

QSFP-DD

Distance

2km

Wavelength

1310nm

Connector

Duplex LC

Power Consumption

≤12W

Transmitter

EML

Receiver

Media

SMF

Modulation（electrical ）

8x53.125Gb/s PAM4

Modulation（Optical ）

4x106.25Gb/s PAM4

Case Temperature(℃)

0 to 70°C (32 to 158°F)

Protocol

400G Ethernet Compliant

Connectivity Solutions

The Fat-Tree Networking Architecture

This solution adopts the Spine-Leaf architecture, which meets the high-speed connectivity and load-balancing requirements of large-scale server clusters. It is suitable for data center network scenarios that require high performance, reliability, and scalability, especially in cloud computing centers.

Cisco 8808,Cisco：N9K-C9364D-GX2A64*400GE,Cisco：N9K-C9364D-GX2A64*400GE,Cisco：N9K-C9364D-GX2A64*400GE,Cisco：N9K-C9332D-GX2B（48*100GE + 8*400GE）

Applications

Product Highlights

Unique advantages of NADDOD 400G transceiver

NADDOD 400G optical transceiver has great advantages in increasing data throughput and maximizing data center bandwidth and port density. 400G QSFP-DD has been tested and recognized by the global market as we are the first brand to complete the commercial order delivery of 400G data center optical modules.

Six professional transceiver performance tests

NADDOD has a full range of professional testing equipments for testing various parameters of products to ensure high performance and quality of optical transmission stability.

Compare Items

	QDD-400G-FR4	OSFP-400G-FR4	OSFP-400G-2xFR4	QDD-400G-XDR4
Form Factor	QSFP-DD	OSFP	OSFP	QSFP-DD
Center Wavelength	1310nm	1310nm	1310nm	1310nm
Connector	Duplex LC	Duplex LC	Dual CS	MTP/MPO-12 APC
Cable Distance	2km	2km	2km	2km
Electrical Modulation	8x53.125Gb/s PAM4(400GAUI-8)	8x53.125Gb/s PAM4(400GAUI-8)	8x53.125Gb/s PAM4(400GAUI-8)	8x53.125Gb/s PAM4(400GAUI-8)
Optical Modulation	4x106.25Gbps PAM4	4x106.25Gbps PAM4	8x53.125Gbps PAM4	4x106.25Gbps PAM4
Modulation Diagram
Power Consumption	≤12W	≤12W	≤12W	≤10.5W
Transmitter Type	CWDM4 EML	CWDM4 EML	CWDM4 EML	1310nm EML
Protocols	QSFP-DD MSA, CMIS Rev4.1, OIF 56G PAM4, 100G Lambda MSA, IEEE 802.3bs	OSFP MSA, CMIS 4.0, 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, HPC, enterprise core, 400G to 400G ethernet	Data Center, HPC, enterprise core, 400G to 400G ethernet	Data Center, HPC, enterprise core, 400G to 400G ethernet	Data Center, HPC, enterprise core, 400G to 400G ethernet, 800G to 2x400G Breakout, 400G to 4x100G Breakout

Questions & Answers

Ask a Question

Can OSFP ports use modules in QSFP-DD form factor, such as Cisco QDD-400G-FR4-S?

OSFP and QSFP-DD are two completely different form factors, so QSFP-DD optical modules like Cisco QDD-400G-FR4-S, QDD-400G-SR8-S, QDD-400G-LR4-S or QDD-400G-DR4-S all these optical transceivers cannot be used in OSFP ports.

Can a 400G link with one end using a Cisco QDD-400G-FR4-S optical module and the other end using Arista OSFP-400G-FR4 OSFP be interconnected?

Yes, OSFP and QSFP-DD are just physical form factors for modules, and as long as the modules are of the same type (such as both being 400G-DR4 or 400G-FR4), OSFP(Arista OSFP-400G-FR4) and QSFP-DD(Cisco QDD-400G-FR4-S) modules can be interconnected.

Can the Cisco QDD-400G-FR4-S modules be used on QSFP-DD ports?

Yes, Cisco QDD-400G-FR4-S modules can be directly used on QSFP-DD ports, but it is important to configure the port speed appropriately when using them.

Customer Reviews

4.8

3 Reviews

5 Star
67%
4 Star
0%
3 Star
0%
2 Star
0%
1 Star
0%

All Reviews (3)

q***n
Verified Purchase
q***n
Verified Purchase
4.5
The module is working as expected, no problems so far and I am very happy with the quality of your product.
Helpful (2)Comments
a***n
Verified Purchase
a***n
Verified Purchase
5.0
The module performs well, seems to be of reliable quality, and connects well with other vendor 400G FR4s I previously purchased, which was a very pleasant surprise.
Helpful (10)Comments
o***2
Verified Purchase
o***2
Verified Purchase
5.0
These modules are fully compatible with my Arista switch and have been working great so far.
Helpful (5)Comments

Resources

QDD-400G-FR4 Datasheet

Quality Certification

What We Supply