What are the main connectivity options for the QDD-400G-VR4?

It can be interconnected with OSFP or QSFP112 port NICs. Since the NIC side is 4-channel, it can't be connected with the regular short-range 8-channel QDD-400G-VR8 module, so it's very suitable for short-range switch and NIC interconnection scenarios.

What are the similarities and differences between QDD-400G-VR4 and QDD-400G-VR8?

Both are suitable for 400G short-haul transmission solutions, and the electrical side is 8x50G PAM4 modulation. However, the optical side of 400GBASE-VR4 is 4x100G PAM4 modulation, which is interconnected with QSFP112/OSFP VR4 modules via MTP/MPO-12 APC multimode patch cables; the optical side of 400GBASE-VR8 is 8x50G PAM4 modulation, which is interconnected with two 400G VR8 modules via MTP/MPO-16 APC multimode patch cables. The 400GBASE-VR8 optical side is 8x50G PAM4 modulated and interconnects two 400G VR8 modules via MTP/MPO-16 APC multimode patch cords.

Can I use different brands of equipment at both ends to connect?

Yes, NADDOD meets the compatibility requirements of many mainstream devices and can be adapted according to actual needs.

400GBASE-VR4 QSFP-DD PAM4 850nm 50m MMF Module for HPE

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HPE S6B51A Compatible 400GBASE-VR4 QSFP-DD PAM4 850nm 50m MTP/MPO-12 MMF Optical Transceiver Module

Name: HPE S6B51A Compatible 400GBASE-VR4 QSFP-DD PAM4 850nm 50m MTP/MPO-12 MMF Optical Transceiver Module
Brand: Naddod
SKU: 103087
Price: 512.00 USD
Availability: InStock
Rating: 5.0 (18 reviews)

#103087

Model: QDD-400G-VR4

Sold: 335

In Stock: 154

Transceiver Types:

QDD-400G-VR4 | 50m

QDD-400G-VR4 | 50m

Brand:

Dell

HPE H3C

Generic

Arista

Juniper

Dell

HPE H3C

Generic

Item Spotlights

Max Power Consumption ≤8W.
Provide Professional Compatibility and Parameter Test Reports.
Compliant with Hot Pluggable QSFP-DD MSA, IEEE 802.3bs, SFF-8679 Standard.
Class1/1M Standard Product, Compliant with RoHS Environmental Protection Standards (Lead-Free).
DDM(Digital Diagnostic Monitoring) Supported.
Significantly Improve the Flexibility, Economy and Reliability of Networking.
30-Day Free Return, 1-Year Free Replacement, 3-Year Warranty, Lifetime After-sales Technical Support.

HPE S6B51A Compatible 400GBASE-VR4 QSFP-DD PAM4 850nm 50m MTP/MPO-12 MMF Optical Transceiver Module

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Specifications

Applications

Product Highlights

Questions & Answers

Resources

Specifications

Applications

Product Highlights

Questions & Answers

Resources

Description

HPE S6B51A Compatible 400G QSFP-DD VR4 PAM4 850nm MTP/MPO-12 OM4 50m Optical Transceiver Module

HPE compatible QDD-400G-VR4 is a multi-mode 4-channel (VR4) QSFP-DD optical transceiver, designed for 400 Gigabit Ethernet (GbE) links on up to 50m of OM4 multimode fiber. The QDD-400G-VR4 converts 8 input channels of 50Gb/s PAM4 electrical data to 4 channels of 50Gb/s PAM4 optical signals, using a nominal wavelength of 850nm, for 400Gb/s optical transmission. This module reduces the number of fiber channels and can interconnect with 400G VR4 modules on OSFP or QSFP112 adapter cards to meet diverse application scenarios for interconnection between different devices.

Specifications

Form Factor

QSFP-DD

Distance

50m

Wavelength

850nm

Connector

MTP/MPO-12 APC

Power Consumption

≤8W

Transmitter

VCSEL

Receiver

Media

MMF

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

Applications

Product Highlights

Questions & Answers

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Can OSFP ports use modules in QSFP-DD form factor, such as QDD-400G-VR4?

OSFP and QSFP-DD are two completely different form factors, so QSFP-DD optical modules like QDD-400G-FR4, QDD-400G-VR4, QDD-400G-LR4 or QDD-400G-DR4 all these optical transceivers cannot be used in OSFP ports.

Can I interconnect a QSFP-DD 400G VR4 module on one end and a QSFP112 or OSFP 400G VR4 module on the other?

Yes, the QSFP-DD/OSFP/QSFP112 only describe the physical form factor of the module and all three modules utilize 4x100G PAM4 for the optical side modulation mode.

What is the maximum transmission distance of QDD-400G-VR4 transceiver?

With OM4 multimode fiber optic patch cable the maximum transmission distance is 100m.