Hey, we're running a mix of Cisco Nexus and Arista switches in our core network. Will this 400G FR4 transceiver work seamlessly across both brands without raising third-party optic alarms?

Absolutely! The LQD-CW400-FR4C is fully OEM-compatible and coded to support Cisco, Arista, and other major networking brands like Juniper and Mellanox. You can deploy it confidently in mixed-switch environments without triggering compatibility errors.

Just to confirm before purchasing for our campus fiber ring—does this transceiver use a standard duplex LC connector, and is it compatible with our existing OS2 single-mode fiber (SMF)?

Yes! This 400G QSFP-DD optical module features an industry-standard Duplex LC interface. It is fully compatible with standard OS2 single-mode fiber (SMF) and supports transmission distances up to 2km utilizing 1310nm CWDM4 wavelengths.

I'm an IT procurement manager looking to order 200 units for a new datacenter build in Frankfurt. Do you offer B2B bulk discounts for large volume purchases?

Yes, we provide competitive tiered pricing for enterprise B2B customers. For an order of 200 pieces of our 400G QSFP-DD modules, you'll receive a significant bulk discount over the standard unit price. Please contact our live sales team for a custom quote!

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Intel QDD-FR4-400G Compatible LINK-PP 400G QSFP-DD 1310nm 2km Duplex LC DOM SMF Optical Transceiver Module

Name: Intel QDD-FR4-400G Compatible LINK-PP 400G QSFP-DD 1310nm 2km Duplex LC DOM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 219442
Price: 543.84 USD
Availability: InStock
Rating: 5 (37 reviews)

# 219442

Product: Intel QDD-FR4-400G Compatible LINK-PP 400G QSFP-DD 1310nm 2km Duplex LC DOM SMF Optical Transceiver Module
SKU: 219442
P/N: LQD-CW400-FR4C
Price: $ 618
Stock: 155 in Stock
Sold: 956
Product URL: https://www.l-p.com/products/472198.htm

For Order Over $1000 Get $15.00 Off , Code: Linkpp15

For Order Over $3000 Get $50.00 Off , Code: Linkpp50

For Order Over $5000 Get $100.00 Off , Code: Linkpp100

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: Intel QDD-FR4-400G Compatible LINK-PP 400G QSFP-DD 1310nm 2km Duplex LC DOM SMF Optical Transceiver Module

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Manufacture: LINK-PP

P/N: LQD-CW400-FR4C

Compatible:: Cisco; LINK-PP; Arista; Broadcom; Ciena; Dell; EdgeCore; Extreme; FS; Generic; H3C; HPE Aruba; HW; Intel; Juniper; NVIDIA/Mellanox

Compatible P/N:: QDD-FR4-400G | 2km

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Intel QDD-FR4-400G Compatible LINK-PP 400G QSFP-DD Specifications

The Intel QDD-FR4-400G Compatible LINK-PP module is a commercial-grade 400G QSFP-DD optical transceiver engineered for high-density networking. Compliant with 400GBASE-FR4 standards, it utilizes 8x53.125Gb/s PAM4 electrical lanes and 4x106.25Gb/s optical channels. It features an integrated EML laser, a PIN receiver, and a duplex LC connector, delivering stable 400Gbps aggregation over single-mode fiber with a maximum power consumption under 10W.

Intel Part Number	QDD-FR4-400G	Vendor Name	LINK-PP
Form Factor	QSFP-DD	Max Data Rate	400Gbps
Connector	Duplex LC	Media	SMF
Wavelength	1271nm, 1291nm, 1311nm, 1331nm	Max Cable Distance	2km
Transmitter Type	CWDM EML	Receiver Type	PIN
Max Power Consumption	9.5W	Protocols	IEEE 802.3bs, QSFP-DD MSA
DDM/DOM	Supported	Operating Temperature range	0°C to +70°C

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Q: Hey, we're running a mix of Cisco Nexus and Arista switches in our core network. Will this 400G FR4 transceiver work seamlessly across both brands without raising third-party optic alarms? By S***e on 2026-02-17

A: Absolutely! The LQD-CW400-FR4C is fully OEM-compatible and coded to support Cisco, Arista, and other major networking brands like Juniper and Mellanox. You can deploy it confidently in mixed-switch environments without triggering compatibility errors. By admin on 2026-02-17
Q: Just to confirm before purchasing for our campus fiber ring—does this transceiver use a standard duplex LC connector, and is it compatible with our existing OS2 single-mode fiber (SMF)? By R***r on 2025-08-27

A: Yes! This 400G QSFP-DD optical module features an industry-standard Duplex LC interface. It is fully compatible with standard OS2 single-mode fiber (SMF) and supports transmission distances up to 2km utilizing 1310nm CWDM4 wavelengths. By admin on 2025-08-27
Q: I'm an IT procurement manager looking to order 200 units for a new datacenter build in Frankfurt. Do you offer B2B bulk discounts for large volume purchases? By D***t on 2025-06-21

A: Yes, we provide competitive tiered pricing for enterprise B2B customers. For an order of 200 pieces of our 400G QSFP-DD modules, you'll receive a significant bulk discount over the standard unit price. Please contact our live sales team for a custom quote! By admin on 2025-06-21

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L***s

Russian Federation

Verified Purchase

5 .0

2026-04-18

Excellent price for 400GBASE-FR4 transceiver modules.

51 Helpful vote Comments

K***z

Italy

Verified Purchase

5 .0

2026-04-11

Evaluated this 400G optical transceiver module against expensive OEM brands for our Toronto high-speed NAS storage backend. The 1271-1331nm multiplexing is efficient, and it handles our continuous 400Gbps traffic without thermal throttling.

180 Helpful vote Comments

E***n

Germany

Verified Purchase

5 .0

2026-04-10

Reliable 400G connectivity for indoor rack patching.

72 Helpful vote Comments

D***l

Ireland

Verified Purchase

5 .0

2026-04-01

Used in our Munich server room. 400G QSFP-DD form factor fit snugly without any issues.

239 Helpful vote Comments

C***e

Philippines

Verified Purchase

5 .0

2026-03-19

2km SMF transmission works exactly as specified.

251 Helpful vote Comments

R***t

Ukraine

Verified Purchase

5 .0

2026-02-14

Seamless integration with our Juniper gear. Duplex LC interface makes patching SMF super easy.

189 Helpful vote Comments

M***s

Indonesia

Verified Purchase

5 .0

2026-01-23

Plug and play on Dell 400G switches!

113 Helpful vote Comments

L***z

Portugal

Verified Purchase

5 .0

2026-01-03

Tested these 400G QSFP-DD 1310nm transceivers for high-density 400Gbps aggregation in our Texas data center. The 9.5W power draw is efficient, and the 4x106.25Gb/s PAM4 lanes deliver stable throughput. Outstanding B2B value.

91 Helpful vote Comments

D***z

Finland

Verified Purchase

5 .0

2026-01-03

Perfect for enterprise cloud 400G interconnects. ☁️

61 Helpful vote Comments

P***t

Viet Nam

Verified Purchase

5 .0

2025-11-24

EML laser performance is superb over 2km. ✨

90 Helpful vote Comments

D***n

Canada

Verified Purchase

5 .0

2025-10-09

Bulk ordered these for our UK cloud deployment. DOM output matches network monitoring tools perfectly.

101 Helpful vote Comments

S***n

Canada

Verified Purchase

5 .0

2025-09-13

Reliable DOM tracking on these 400G SMF optics.

171 Helpful vote Comments

M***r

Republic of Korea

Verified Purchase

5 .0

2025-08-15

Exact QSFP-DD MSA specs, zero compatibility issues.

138 Helpful vote Comments

S***e

Austria

Verified Purchase

5 .0

2025-08-08

Solid 400GBASE-FR4 module for campus fiber network.

122 Helpful vote Comments

D***s

Germany

Verified Purchase

5 .0

2025-05-10

Deployed these LINK-PP 400G FR4 optics for our Chicago spine-leaf architecture. Flawless Arista compatibility and the CWDM EML transmitter keeps signal integrity solid over 1.5km SMF. DOM monitoring is highly accurate!

88 Helpful vote Comments

C***n

Thailand

Verified Purchase

5 .0

2025-05-08

We procured a batch for our European campus fiber network upgrade. The IEEE 802.3bs compliance ensures smooth interoperability with Mellanox adapters. LC connectors feel premium, and 2km reach covers our inter-building links perfectly.

208 Helpful vote Comments

L***z

Ireland

Verified Purchase

5 .0

2025-04-02

Quick bulk deployment for our NY server racks.

97 Helpful vote Comments

C***n

India

Verified Purchase

5 .0

2025-03-06

Good alternative to OEM. The 400G CWDM4 optics run cool in our climate-controlled cabinets.

182 Helpful vote Comments

N***z

Ukraine

Verified Purchase

5 .0

2025-02-21

Highly recommend this CWDM4 QSFP-DD for base station backhaul. 1310nm wavelength is rock solid.

46 Helpful vote Comments

J***d

United States

Verified Purchase

5 .0

2023-07-31

Item came on time, as described. No issues with the seller.

98 Helpful vote Comments

A***o

Poland

Verified Purchase

5 .0

2023-07-13

Have always gotten prompt and courteous service with great pricing.

47 Helpful vote Comments

T***g

Israel

Verified Purchase

5 .0

2023-04-13

it’s always a pleasure to do business with LINK-PP.

45 Helpful vote Comments

T***a

United States

Verified Purchase

5 .0

2023-03-29

Found what I needed at a good price. Ordered it and received it in four days.

103 Helpful vote Comments

M***n

Poland

Verified Purchase

5 .0

2023-01-29

My first experience with you guys. Was very pleased. Prices were excellent. I was REALLY happy with the customer service. Fast and reliable. I'll shop at the site again definitely.

61 Helpful vote Comments

r***g

Netherlands

Verified Purchase

5 .0

2022-10-14

Yes you can get this item for much cheaper elsewhere but who knows what kind of quality you\'re gonna be getting. And replacing that part and dealing network problems from low quality parts will cost you much more in the long run.

59 Helpful vote Comments

N***e

Bulgaria

Verified Purchase

5 .0

2022-08-15

I received the order very quickly once the payment was done.. Thanks

67 Helpful vote Comments

T***g

Romania

Verified Purchase

5 .0

2022-07-16

always happy with quality of merchandise, as well as Fast delivery. wide selection of goods

12 Helpful vote Comments

J***n

Hong Kong

Verified Purchase

5 .0

2022-06-19

Price is very affordable.

47 Helpful vote Comments

G***a

United States

Verified Purchase

5 .0

2022-05-28

Item arrived much quicker than I expected. Thank you.

13 Helpful vote Comments

R***t

Bulgaria

Verified Purchase

5 .0

2022-05-27

Cheap prices, Fast shipping and good products.

53 Helpful vote Comments

R***e

Mexico

Verified Purchase

5 .0

2022-05-23

Great performance and compatibility for the money. Easy to use.

48 Helpful vote Comments

J***e

Indonesia

Verified Purchase

5 .0

2022-05-20

I just placed my second order with LINK-PP and have been extremely impressed by the service. Orders are filled quickly and the prices are far better than ordering directly from local stores.

69 Helpful vote Comments

D***g

Republic of Korea

Verified Purchase

4 .0

2022-04-13

Came on time, great customer service with attention to communication. Great supplier!

87 Helpful vote Comments

K***g

United States

Verified Purchase

5 .0

2022-03-02

Guess what: they worked right away, from the moment I put them in the switch! So I am happy. Happy that the ethernet port are the right ones, happy with you handling my case and happy with LINK-PP as a company with such a great customer care.

76 Helpful vote Comments

I***f

Belgium

Verified Purchase

5 .0

2022-02-23

very pleased w/ all orders to date.

91 Helpful vote Comments

M***e

Spain

Verified Purchase

5 .0

2022-02-13

I was impressed by how easy it was to order and helpfulness of frontline staff, when I needed to change the delivery address to arrive upstate at a business function.

48 Helpful vote Comments

T***d

Hungary

Verified Purchase

5 .0

2022-01-13

I received my order quickly. They were exactly what I ordered and worked properly. I plan on ordering all my future transceiver supplies from l-p.com.

19 Helpful vote Comments