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.

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Allied Telesis QSFPER4 Compatible LINK-PP 40G QSFP+ 1310nm 40km Duplex LC DOM SMF Optical Transceiver Module

Name: Allied Telesis QSFPER4 Compatible LINK-PP 40G QSFP+ 1310nm 40km Duplex LC DOM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 219781
Price: 374.96 USD
Availability: InStock
Rating: 4.9 (26 reviews)

# 219781

Product: Allied Telesis QSFPER4 Compatible LINK-PP 40G QSFP+ 1310nm 40km Duplex LC DOM SMF Optical Transceiver Module
SKU: 219781
P/N: LQ-CW40-ER4C
Price: $ 436
Stock: 2177 in Stock
Sold: 4.6K
Product URL: https://www.l-p.com/products/473101.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

: Allied Telesis QSFPER4 Compatible LINK-PP 40G QSFP+ 1310nm 40km Duplex LC DOM SMF Optical Transceiver Module

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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:: QSFPIR4 | 2km; QSFPER4 | 40km

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Allied Telesis QSFPER4 Compatible LINK-PP 40G QSFP+ Specifications

The Allied Telesis QSFPER4 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.

Allied Telesis Part Number	QSFPER4	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

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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

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S***a

Belgium

Verified Purchase

5 .0

2026-06-11

Fast delivery, working great in our Arista switches. ⚡

197 Helpful vote Comments

K***n

Venezuela

Verified Purchase

5 .0

2026-04-28

Incredible TCO for bulk procurement! We tested the 40GBASE-ER4 optical modules under full load. The DFB laser transmitter remained highly stable across commercial temps. Excellent vendor for telecom equipment upgrades.

131 Helpful vote Comments

A***n

Greece

Verified Purchase

5 .0

2026-03-05

Works seamlessly with Juniper and Mikrotik switches.

203 Helpful vote Comments

D***n

Portugal

Verified Purchase

5 .0

2026-01-16

IEEE 802.3ba compliance is spot on. Easily compatible with our mixed HP Dell environment.

147 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

C***s

Spain

Verified Purchase

5 .0

2025-12-27

Flawless 1310nm 40G module for long-haul links.

155 Helpful vote Comments

D***e

Peru

Verified Purchase

5 .0

2025-06-17

Excellent APD receiver sensitivity on these SMF transceivers.

189 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

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

S***z

Denmark

Verified Purchase

5 .0

2024-11-28

Deployed a batch for a multi-site enterprise NAS. The CWDM multiplexing over Duplex LC is flawless, and the 18.5dB power budget ensures zero signal drops across our 38km fiber runs!

74 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

S***t

Belarus

Verified Purchase

4 .0

2024-01-05

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

31 Helpful vote Comments

H***n

United States

Verified Purchase

5 .0

2023-11-08

Best website to buy cabling products, lots of information and Fast shippment. Great job!

54 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

Y***u

Cambodia

Verified Purchase

5 .0

2023-04-04

Smooth, Fast ordering. Efficient customer service.

76 Helpful vote Comments

C***N

Argentina

Verified Purchase

5 .0

2023-02-23

Buy the sfp+ Cages from several vendors, Link-pp is the best, highly compatible.

49 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

P***n

Austria

Verified Purchase

5 .0

2022-08-13

The price for 10/25/40G Transceiver Modules is very competitive, in fact better than I've seen elsewhere and the purchase process was flawless. I'd only purchase through l-p.com in the future.

23 Helpful vote Comments

A***b

Republic of Korea

Verified Purchase

5 .0

2022-04-09

First purchase a very pleasant experience

108 Helpful vote Comments

L***u

Hong Kong

Verified Purchase

5 .0