Do these 40G modules meet CE and standard IEEE specs for EU deployments?

100%. They are fully compliant with the IEEE 802.3ba 40GBASE-LR4 standard and QSFP+ MSA. For EU compliance, they hold CE, RoHS, and REACH certifications, so your compliance team has nothing to worry about.

The connector says MPO-12/APC. Do I strictly need an APC patch cable for this 10km run, or can I get away with a standard UPC single-mode?

You definitely want to stick with MPO-12/APC single-mode fiber here. The angled polish (APC) minimizes back reflection (return loss), which is crucial for maintaining signal integrity over a 10km run. Using UPC will cause signal degradation and high CRC errors over distance.

Hello, we're running a mixed environment with Cisco Nexus and some Arista spines. Will this LQ-M3140-LR4C optic play nice with both out of the box, or do we need specific firmware for each?

They work right out of the box! These are fully MSA compliant and rigorously tested for multi-vendor interoperability. You can plug them into your Cisco and Arista gear without worrying about any "unsupported transceiver" errors.

What is FEC (Forward Error Correction)?

FEC (Forward Error Correction) is an error correction technique todetect and correct a limited number of errors in transmitted data without the need for retransmission. It works by adding redundant bits to a bitstream to help the decoder odetect and correct some transmission errors without the need for retransmission. This function needs to be turned on by the transmission device.

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Juniper QSFPP-4X10GE-LR Compatible LINK-PP 40G QSFP+ 1310nm 10km MPO-12/APC DOM SMF Optical Transceiver Module

Name: Juniper QSFPP-4X10GE-LR Compatible LINK-PP 40G QSFP+ 1310nm 10km MPO-12/APC DOM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 219607
Price: 177.16 USD
Availability: InStock
Rating: 5 (27 reviews)

# 219607

Product: Juniper QSFPP-4X10GE-LR Compatible LINK-PP 40G QSFP+ 1310nm 10km MPO-12/APC DOM SMF Optical Transceiver Module
SKU: 219607
P/N: LQ-M3140-LR4C
Price: $ 206
Stock: 740 in Stock
Sold: 982
Product URL: https://www.l-p.com/products/495319.htm

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Manufacture: LINK-PP

P/N: LQ-M3140-LR4C

Compatible:: Cisco; LINK-PP; Alcatel-Lucent; Allied Telesis; Arista; Avago; Avaya; Brocade; Chelsio; Ciena; D-Link; Dell; EdgeCore; Extreme; Generic; H3C; HPE; HW; IBM; Intel; Ixia; Juniper; MRV; Mikrotik; NVIDIA/Mellanox; Palo Alto

Compatible P/N:: QSFPP-40GBASE-SR4 | 300m; QSFPP-4X10GE-SR | 300m; JNP-QSFP-4X10GE-LR | 10km; QSFPP-4X10GE-LR | 10km

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Juniper QSFPP-4X10GE-LR Compatible LINK-PP 40G QSFP+ Specifications

The Juniper QSFPP-4X10GE-LR Compatible LINK-PP 40G QSFP+ transceiver delivers exceptional performance for high-speed data center networks. This commercial-grade optical module operates over single-mode fiber, providing reliable bandwidth using advanced PSM4 architecture. Our comprehensive transceiver specifications highlight a robust design optimized for seamless integration into modern enterprise telecommunications and high-density networking environments.

Juniper Part Number	QSFPP-4X10GE-LR	Vendor Name	LINK-PP
Form Factor	QSFP+	Max Data Rate	44.8Gbps (4x 11.2Gbps)
Wavelength	1310nm	Max Cable Distance	10km
Connector	MPO-12/APC	Media	SMF
Transmitter Type	DFB	Receiver Type	PIN
Host FEC	Supported	Modulation	NRZ
Protocols	40G Ethernet, MSA Compliant	Operating Temperature Range	0°C to +70°C

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Q: Do these 40G modules meet CE and standard IEEE specs for EU deployments? By M***n on 2026-05-21

A: 100%. They are fully compliant with the IEEE 802.3ba 40GBASE-LR4 standard and QSFP+ MSA. For EU compliance, they hold CE, RoHS, and REACH certifications, so your compliance team has nothing to worry about. By admin on 2026-05-21
Q: The connector says MPO-12/APC. Do I strictly need an APC patch cable for this 10km run, or can I get away with a standard UPC single-mode? By S***n on 2026-05-05

A: You definitely want to stick with MPO-12/APC single-mode fiber here. The angled polish (APC) minimizes back reflection (return loss), which is crucial for maintaining signal integrity over a 10km run. Using UPC will cause signal degradation and high CRC errors over distance. By admin on 2026-05-06
Q: Hello, we're running a mixed environment with Cisco Nexus and some Arista spines. Will this LQ-M3140-LR4C optic play nice with both out of the box, or do we need specific firmware for each? By D***n on 2026-01-06

A: They work right out of the box! These are fully MSA compliant and rigorously tested for multi-vendor interoperability. You can plug them into your Cisco and Arista gear without worrying about any "unsupported transceiver" errors. By admin on 2026-01-06
Q: What is FEC (Forward Error Correction)? By M***l on 2025-05-05

A: FEC (Forward Error Correction) is an error correction technique todetect and correct a limited number of errors in transmitted data without the need for retransmission. It works by adding redundant bits to a bitstream to help the decoder odetect and correct some transmission errors without the need for retransmission. This function needs to be turned on by the transmission device. By admin on 2025-05-05

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J***s

India

Verified Purchase

5 .0

2026-06-06

DOM works perfectly on these MPO-12 transceivers.

103 Helpful vote Comments

A***n

Brazil

Verified Purchase

5 .0

2026-05-01

Top tier OEM compatible QSFP+ for enterprise.

21 Helpful vote Comments

S***r

Switzerland

Verified Purchase

5 .0

2026-04-17

Deployed these for base station backhaul over 10km single-mode fiber. The 4x DFB transmitters maintain stable TX power even in outdoor cabinets hitting 65°C. Unbeatable TCO for telecom 40G upgrades.

23 Helpful vote Comments

R***n

Venezuela

Verified Purchase

5 .0

2026-03-24

No CRC errors after a month. Solid 1310nm QSFP+ for long-haul datacenter connectivity.

108 Helpful vote Comments

S***e

Indonesia

Verified Purchase

5 .0

2026-03-09

Mass deployment in our campus fiber network was a breeze. Tested these MPO-12 SMF modules across Arista and Cisco switches—zero DOM issues and perfect 4x10G breakout performance. Highly recommended!

125 Helpful vote Comments

S***n

Mexico

Verified Purchase

5 .0

2026-03-08

Excellent 40G QSFP+ transceivers for our enterprise network backbone. We ran 1310nm SMF tests over 8km, and the PIN receivers showed zero packet loss. Truly cost-effective OEM alternatives!

74 Helpful vote Comments

M***s

Dominican Republic

Verified Purchase

5 .0

2026-01-30

No packet loss on our Arista switches. ⚡

80 Helpful vote Comments

J***l

Australia

Verified Purchase

5 .0

2025-11-17

Handles 60°C operating temperature without any sweat.

145 Helpful vote Comments

A***a

Greece

Verified Purchase

5 .0

2025-10-24

Works great with Juniper, exact 1310nm specs!

144 Helpful vote Comments

T***e

Panama

Verified Purchase

5 .0

2025-10-14

Superb multi-vendor switch compatibility test results. Will order more for our metro networks.

100 Helpful vote Comments

R***r

Chile

Verified Purchase

5 .0

2025-10-10

Great compatible Cisco 4x10GBASE-LR module. Easy plug-and-play for our rack-to-rack NAS setup!

109 Helpful vote Comments

J***s

France

Verified Purchase

4 .0

2025-10-08

Box arrived a bit dented, but the 4x10GBASE-LR QSFP+ modules work flawlessly.

103 Helpful vote Comments

P***t

Austria

Verified Purchase

5 .0

2025-06-14

Quick deployment for our 10G NAS breakout. The 4x10G SMF connection is rock solid!

216 Helpful vote Comments

M***r

Czech Republic

Verified Purchase

5 .0

2024-12-31

Reliable single-mode 1310nm DFB transmitter inside.

80 Helpful vote Comments

R***y

Turkey

Verified Purchase

5 .0

2024-12-30

Excellent Quality and Good Service

101 Helpful vote Comments

M***g

Germany

Verified Purchase

5 .0

2024-11-22

Works flawlessly with my Mellanox gear. This 10km MPO-12 transceiver handles heavy loads perfectly.

108 Helpful vote Comments

A***s

Ireland

Verified Purchase

5 .0

2024-10-07

Awesome cheap 40G QSFP+ module in EU. DOM readings are spot on so far.

129 Helpful vote Comments

A***y

Germany

Verified Purchase

5 .0

2024-09-19

no problems to report

18 Helpful vote Comments

F***h

Thailand

Verified Purchase

5 .0

2024-03-28

Every thing went smooth. I had a question and called, they helped me right away.

18 Helpful vote Comments

G***i

Mexico

Verified Purchase

5 .0

2024-03-25

The 10/25/40G Transceiver Modules came to me soon and they all worked well with my devices. Thanks a lot! I will definitely buy from you again!

76 Helpful vote Comments

R***y

Spain

Verified Purchase

5 .0

2024-01-10

The service was outstanding. The price was low and the quality was good. If I need more 10/25/40G Transceiver Modules in the future, I will buy from you again!

28 Helpful vote Comments

J***r

United States

Verified Purchase

5 .0

2024-01-09

I like ordering Optical Transceiver modules here because they have the cheapest prices I could find.

30 Helpful vote Comments

J***x

Italy

Verified Purchase

5 .0