We are currently using standard OS2 single-mode fiber with duplex LC patch cords. Is any special physical adaptation required for the CWDM4 wavelengths?

No special adapters are needed! The module features an internal CWDM multiplexer that routes the four wavelengths (1271nm, 1291nm, 1311nm, 1331nm) through a standard Duplex LC interface. It perfectly matches your existing OS2 SMF cabling for instant, plug-and-play 40km transmission.

Will this 40GBASE-ER4 module interoperate seamlessly with our existing Cisco Nexus 9000 and Juniper QFX series switches? We run a mixed environment.

Absolutely. Our LQ-CW40-ER4C is strictly MSA compliant and undergoes rigorous OEM compatibility testing. It works flawlessly across mixed Cisco, Juniper, and Arista deployments without triggering any "unsupported transceiver" errors on your console.

Does this QSFP+ transceiver strictly adhere to the IEEE 802.3ba and OTN OTU3 standards for our carrier-grade infrastructure?

Yes, it is fully compliant with IEEE 802.3ba 40GBASE-ER4 and OTN OTU3 protocols. Furthermore, it meets FDA/CDRH and IEC-60825 global standards for laser safety, making it completely certified for high-demand data center and carrier network integrations.

We are planning a massive metro network upgrade. Do you offer bulk purchase discounts if we procure 500+ units of this QSFP+ Transceivers?

Yes, we provide tiered B2B pricing for large-scale enterprise and telecom deployments. For batch orders exceeding 500 units, you will receive a significantly reduced unit cost. Please contact our sales engineering team directly for a customized quote.

Breadcrumb: Home; Products; Optics Transceivers | SFP Modules; 10/25/40G/100G Transceiver Modules; 40G QSFP+; 219802

Click to open expanded view

Intel E40GQSFPER Compatible LINK-PP 40G QSFP+ 1310nm 40km Duplex LC DOM SMF Optical Transceiver Module

Name: Intel E40GQSFPER Compatible LINK-PP 40G QSFP+ 1310nm 40km Duplex LC DOM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 219802
Price: 374.96 USD
Availability: InStock
Rating: 4.9 (31 reviews)

# 219802

Product: Intel E40GQSFPER Compatible LINK-PP 40G QSFP+ 1310nm 40km Duplex LC DOM SMF Optical Transceiver Module
SKU: 219802
P/N: LQ-CW40-ER4C
Price: $ 436
Stock: 2136 in Stock
Sold: 4.6K
Product URL: https://www.l-p.com/products/472840.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

New Users: $10 Coupon for Orders , Code: linkpp2610

31 Reviews

4 Questions

Request Stock

4.6K Sold

$ 436

Free shipping over $600, If you need a more favorable price, please contact us directly.

Qty (pcs) :

Unit Price :

$ 436

100

$ 414.2

1000

$ 401.12

3000

$ 388.04

6000

$ 374.96

Manufacture: LINK-PP

P/N: LQ-CW40-ER4C

Compatible:: Cisco; LINK-PP; Alcatel-Lucent; Allied Telesis; Arista; Avago; Avaya; Brocade; Check Point; Chelsio; Ciena; D-Link; Dell; Edge-Core; Extreme; F5 Networks; FS; Fortinet; Generic; H3C; HPE Aruba; HPE H3C; HW; Intel; Juniper; MRV; Mikrotik; NVIDIA/Mellanox; Palo Alto; Quanta; ZTE

Compatible P/N:: QSFP-IR4-40G | 2km; QSFP-ELR4-40G | 20km; E40GQSFPER | 40km

Shipping:

To Be Negotiated

Free Shipping

Can't deliver

to United States via {{now_chooseship?now_chooseship.name:''}}

Estimated delivery time : {{now_chooseship?now_chooseship.datemin:''}}-{{now_chooseship?now_chooseship.datemax:''}} days. See details

5-Year Warranty 30-Day Returns 30-Day Exchange

Stock:

{{parseInt(detail_data.left_num) ? detail_data.left_num +' in Stock' :detail_data.zeroStockOrder==0?'Out of Stock':'Available'}} .

Quantity:

( Min. Order {{detail_data.prodInfo.minimum_ordered_quantity}} )

undeliverable

Total Price:

{{ detail_data.displayed_price.unit_prefix }} {{ detail_data.displayed_price.original_total_price }} ( {{ detail_data.displayed_price.rate_of_discount }}% OFF ) {{detail_data.displayed_price.ex_sell_type}}

Add to wish

Specifications

Specification
Videos
Matching Products
Download
Q&A
Customer Reviews

Intel E40GQSFPER Compatible LINK-PP 40G QSFP+ Specifications

The Intel E40GQSFPER Compatible LINK-PP module is a high-performance 40G QSFP+ transceiver designed for demanding optical communication applications. Fully compliant with the 40GBASE-ER4 standard, this optical module delivers an aggregate bandwidth exceeding 40Gbps. It operates efficiently over single-mode fiber, making it an optimal choice for reliable, high-speed data center interconnections and long-haul networking.

Intel Part Number	E40GQSFPER	Vendor Name	LINK-PP
Form Factor	QSFP+	Max Data Rate	40Gbps
Wavelength	1271nm, 1291nm, 1311nm, 1331nm	Max Cable Distance	40km
Connector	Duplex LC	Media	SMF
Transmitter Type	DFB	Receiver Type	APD
TX Power	-2.7~4.5dBm	Receiver Sensitivity	<-21.2dBm
Powerbudget	18.5dB	Receiver Overload	-4.5dBm
Power Consumption	≤3.3W	Operating Temperature Range	0°C to +70°C
Host FEC	Supported	Protocols	OTN OTU3, 40G Ethernet, SATA/SAS3, MSA Compliant

Videos

Matching Products

Pictures

ID#

Description

Price

Stock

Add to Cart

Download

Product Drawing

PDF
LQ-CW40-ER4C.pdf

Questions & Answers
Ask a Question

No data

Q: We are currently using standard OS2 single-mode fiber with duplex LC patch cords. Is any special physical adaptation required for the CWDM4 wavelengths? By B***n on 2026-05-13

A: No special adapters are needed! The module features an internal CWDM multiplexer that routes the four wavelengths (1271nm, 1291nm, 1311nm, 1331nm) through a standard Duplex LC interface. It perfectly matches your existing OS2 SMF cabling for instant, plug-and-play 40km transmission. By admin on 2026-05-13
Q: Will this 40GBASE-ER4 module interoperate seamlessly with our existing Cisco Nexus 9000 and Juniper QFX series switches? We run a mixed environment. By P***z on 2026-04-25

A: Absolutely. Our LQ-CW40-ER4C is strictly MSA compliant and undergoes rigorous OEM compatibility testing. It works flawlessly across mixed Cisco, Juniper, and Arista deployments without triggering any "unsupported transceiver" errors on your console. By admin on 2026-04-25
Q: Does this QSFP+ transceiver strictly adhere to the IEEE 802.3ba and OTN OTU3 standards for our carrier-grade infrastructure? By D***s on 2026-02-19

A: Yes, it is fully compliant with IEEE 802.3ba 40GBASE-ER4 and OTN OTU3 protocols. Furthermore, it meets FDA/CDRH and IEC-60825 global standards for laser safety, making it completely certified for high-demand data center and carrier network integrations. By admin on 2026-02-19
Q: We are planning a massive metro network upgrade. Do you offer bulk purchase discounts if we procure 500+ units of this QSFP+ Transceivers? By L***n on 2026-02-17

A: Yes, we provide tiered B2B pricing for large-scale enterprise and telecom deployments. For batch orders exceeding 500 units, you will receive a significantly reduced unit cost. Please contact our sales engineering team directly for a customized quote. By admin on 2026-02-17

Customer Reviews
Write a Review

{{stardata.star}}

{{comment.count}} reviews
5 Stars

{{comment.star5}}%

4 Stars

{{comment.star4}}%

3 Stars

{{comment.star3}}%

2 Stars

{{comment.star2}}%

1 Star

{{comment.star1}}%

All Reviews ({{comment.star_num?comment.star_num:comment.count}})

All Reviews

5 stars only

4 stars only

3 stars only

2 stars only

1 star only
Reviews with Pictures ( {{comment.pic_comment}} )
See All Reviews

No data

S***s

Argentina

Verified Purchase

5 .0

2026-03-22

Duplex LC connection is super stable. (^-^)

71 Helpful vote Comments

A***n

Greece

Verified Purchase

5 .0

2026-03-05

Works seamlessly with Juniper and Mikrotik switches.

203 Helpful vote Comments

M***a

Japan

Verified Purchase

4 .0

2025-12-28

Packaging was slightly dented upon arrival, but the 40G QSFP+ transceiver works flawlessly.

167 Helpful vote Comments

K***z

Ecuador

Verified Purchase

5 .0

2025-12-09

Great price for MSA compliant 40Gbps QSFP+.

129 Helpful vote Comments

M***t

Viet Nam

Verified Purchase

5 .0

2025-09-15

Tested these 40G QSFP+ modules across Cisco and Arista switches for our campus fiber network. The APD receiver sensitivity hit <-21.2dBm easily. Highly recommend for 40km long-haul networking!

70 Helpful vote Comments

L***n

Republic of Korea

Verified Purchase

5 .0

2025-08-08

Using this 40G QSFP+ for 35km base station backhaul. Very stable under 0-70°C operation.

29 Helpful vote Comments

M***s

Ireland

Verified Purchase

5 .0

2025-06-07

Reliable 40GBASE-ER4 for our data center backbone.

87 Helpful vote Comments

A***n

Sweden

Verified Purchase

5 .0

2025-05-17

Replaced old optics with this 40G ER4. The <3.3W power consumption is totally accurate!

45 Helpful vote Comments

S***n

Argentina

Verified Purchase

5 .0

2025-04-21

Best 40km QSFP+ ER4 for enterprise NAS setup!

40 Helpful vote Comments

J***z

Colombia

Verified Purchase

5 .0

2025-02-25

Superior optical dispersion control over SMF. Exactly what our data center fiber upgrade needed.

75 Helpful vote Comments

P***e

Switzerland

Verified Purchase

5 .0

2025-02-15

Smooth integration into our core routers. The duplex LC interface clicked perfectly into place. ✨

36 Helpful vote Comments

E***s

Netherlands

Verified Purchase

5 .0

2025-02-04

Solid 40km QSFP+ modules for our campus.

140 Helpful vote Comments

N***n

France

Verified Purchase

5 .0

2025-01-13

High-performance APD receiver handles the 40km reach effortlessly. Great addition to our outdoor cabinets.

44 Helpful vote Comments

L***n

Panama

Verified Purchase

5 .0

2025-01-12

Batch deployed 50 SMF transceivers today. Outstanding CWDM4 efficiency and very low power budget.

50 Helpful vote Comments

L***s

Belgium

Verified Purchase

5 .0

2024-12-27

As an infrastructure admin, I demand strict MSA compliance. These ER4 SMF optical transceivers deliver incredible 40Gbps throughput with robust DDM diagnostics. Perfect for our massive data center interconnects. ᕙ(`▽´)ᕗ

146 Helpful vote Comments

M***z

Peru

Verified Purchase

4 .0

2024-11-12

Delivery took a day longer than expected, otherwise great LC SMF optical transceivers!

185 Helpful vote Comments

K***s

Netherlands

Verified Purchase

5 .0

2024-11-01

Upgraded our metro network with these 40G modules. Real-time DOM saves our O&M team!

88 Helpful vote Comments

C***l

Russian Federation

Verified Purchase

5 .0

2024-10-28

Plug and play! DOM monitoring works perfectly.

66 Helpful vote Comments

S***t

Belarus

Verified Purchase

4 .0

2024-01-05

Quick services. They kept us updated with our order process.

31 Helpful vote Comments

S***a

India

Verified Purchase

5 .0

2023-09-18

Great selection, prices and the website is easy to navigate!

24 Helpful vote Comments

J***e

Israel

Verified Purchase

5 .0

2023-09-12

Product works very fine.

99 Helpful vote Comments

O***t

Bangladesh

Verified Purchase

5 .0

2023-08-12

They have worked with me so in depth on projects and helped develop my knowledge. I will always use them for all optics needs.

83 Helpful vote Comments

T***a

New Zealand

Verified Purchase

5 .0

2022-12-28

good quatity , good service

48 Helpful vote Comments

M***r

Brazil

Verified Purchase

5 .0

2022-12-23

The seller is very helpful and take care of my questions very Fast and seriously. I would definitely come to buy more 10/25/40G Transceiver Modules next time.

59 Helpful vote Comments

I***o

France

Verified Purchase

5 .0

2022-04-22

Quick delivery and product as advertised.

105 Helpful vote Comments

L***u

Hong Kong

Verified Purchase

5 .0