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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Juniper QSFPP-40GBASE-ER4 Compatible LINK-PP 40G QSFP+ 1310nm 40km Duplex LC DOM SMF Optical Transceiver Module

Name: Juniper QSFPP-40GBASE-ER4 Compatible LINK-PP 40G QSFP+ 1310nm 40km Duplex LC DOM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 219803
Price: 374.96 USD
Availability: InStock
Rating: 4.9 (31 reviews)

# 219803

Product: Juniper QSFPP-40GBASE-ER4 Compatible LINK-PP 40G QSFP+ 1310nm 40km Duplex LC DOM SMF Optical Transceiver Module
SKU: 219803
P/N: LQ-CW40-ER4C
Price: $ 436
Stock: 2150 in Stock
Sold: 4.4K
Product URL: https://www.l-p.com/products/472718.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

: Juniper QSFPP-40GBASE-ER4 Compatible LINK-PP 40G QSFP+ 1310nm 40km Duplex LC DOM SMF Optical Transceiver Module

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Manufacture: LINK-PP

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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:: JNP-QSFP-40GE-IR4 | 2km; QSFP-LR4-40G-I | 10km; QSFPP-40GBASE-LR4 | 10km; SRX-QSFP-40G-LR4 | 10km; JNP-QSFP-40G-LR4-20 | 20km; JNP-QSFP-40GE-ER4 | 40km; QSFPP-40GBASE-ER4 | 40km

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Juniper QSFPP-40GBASE-ER4 Compatible LINK-PP 40G QSFP+ Specifications

The Juniper QSFPP-40GBASE-ER4 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.

Juniper Part Number	QSFPP-40GBASE-ER4	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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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

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

C***g

India

Verified Purchase

5 .0

2025-07-29

Perfect Cisco compatible 40G optics, zero packet loss.

142 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

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

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***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

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

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

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

J***e

Israel

Verified Purchase

5 .0

2023-09-12

Product works very fine.

99 Helpful vote Comments

M***s

Cambodia

Verified Purchase

5 .0

2023-06-06

They are quick to confirm the order, contacted me a second time to let me know the ETA of my package. The package arrived on time and in excellent shape.

54 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

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

L***s

New Zealand

Verified Purchase

5 .0

2022-09-16

Great advice and service with support along the way.

86 Helpful vote Comments

M***i

Taiwan, Province of China

Verified Purchase

5 .0