Can you confirm if these transceivers meet international compliance standards? We have strict regulatory requirements for our telecom infrastructure.

Yes, the LS-SC31551G-40I strictly adheres to the MSA (Multi-Source Agreement), as well as CE, FCC, and RoHS global compliance standards. Our internal Quality & Compliance Center batch-tests every module to ensure enterprise-grade reliability and regulatory safety.

does this simplex SC connector require single-mode fiber (SMF) or multi-mode fiber (MMF) for the 40km reach?

This optical module is specifically engineered for Single-Mode Fiber (SMF). To achieve the maximum 40km transmission distance with optimal DDM readings and properly utilize the 1310nm/1550nm WDM wavelengths, you must use standard SMF cables.

We are running a mix of Cisco and Juniper switches. Will this 1.25G SFP BiDi module plug and play without triggering any third-party warning logs?

Absolutely. Our LS-SC31551G-40I modules undergo rigorous multi-brand compatibility testing. They are 100% plug-and-play and will seamlessly integrate into OEM switches from Cisco, Juniper, Arista, and others without throwing unverified transceiver error codes.

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LINK-PP LS-SC31551G-40I 1.25G SFP BiDi 1310nm-TX/1550nm-RX 40km Simplex SC DOM SMF Optical Transceiver Module (Industrial)

Name: LINK-PP LS-SC31551G-40I 1.25G SFP BiDi 1310nm-TX/1550nm-RX 40km Simplex SC DOM SMF Optical Transceiver Module (Industrial)
Brand: LINK-PP
SKU: 202195
Price: 18.49 USD
Availability: InStock
Rating: 4.9 (25 reviews)

# 202195

Product: LINK-PP LS-SC31551G-40I 1.25G SFP BiDi 1310nm-TX/1550nm-RX 40km Simplex SC DOM SMF Optical Transceiver Module (Industrial)
SKU: 202195
P/N: LS-SC31551G-40I
Price: $ 21.5
Stock: 30 in Stock
Sold: 870
Product URL: https://www.l-p.com/products/491674.htm

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

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Manufacture: LINK-PP

P/N: LS-SC31551G-40I

Compatible:: LINK-PP

Compatible P/N:: LS-SC31551G-03C | 3km; LS-SC31551G-03I | 3km; LS-SC55311G-03C | 3km; LS-SC55311G-03I | 3km; LS-SC31491G-10C | 10km; LS-SC31551G-10C | 10km; LS-SC31551G-10I | 10km; LS-SC49311G-10C | 10km; LS-SC55311G-10C | 10km; LS-SC55311G-10I | 10km; LS-SC31491G-20C | 20km; LS-SC31551G-20C | 20km; LS-SC31551G-20I | 20km; LS-SC49311G-20C | 20km; LS-SC55311G-20C | 20km; LS-SC55311G-20I | 20km; LS-SC31551G-40C | 40km; LS-SC31551G-40I | 40km; LS-SC55311G-40C | 40km; LS-SC55311G-40I | 40km

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LINK-PP LS-SC31551G-40I 1.25G BiDi SFP Specifications

The LINK-PP LS-SC31551G-40I is an industrial grade 1.25G BiDi SFP transceiver designed for robust single-mode fiber networks. This high-performance BiDi optical module leverages WDM technology to maximize bandwidth efficiency. Featuring extreme temperature tolerance, this pluggable optical transceiver guarantees seamless gigabit Ethernet connectivity in harsh outdoor environments and demanding telecommunication infrastructures.

LINK-PP Part Number	LS-SC31551G-40I	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	1.25Gbps
Wavelength	1310nm-TX/1550nm-RX	Max Cable Distance	40km
Connector	Simplex SC	Media	SMF
Transmitter Type	DFB	Receiver Type	PIN
TX Power	-9 to 0dBm	RX Power	-23 to -1dBm
Receiver Sensitivity	-24dBm	Receiver Overload	-3dBm
DOM Support	Yes	Operating Temperature Range	-40 to 85°C

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Q: Can you confirm if these transceivers meet international compliance standards? We have strict regulatory requirements for our telecom infrastructure. By A***z on 2026-07-22

A: Yes, the LS-SC31551G-40I strictly adheres to the MSA (Multi-Source Agreement), as well as CE, FCC, and RoHS global compliance standards. Our internal Quality & Compliance Center batch-tests every module to ensure enterprise-grade reliability and regulatory safety. By admin on 2026-07-22
Q: does this simplex SC connector require single-mode fiber (SMF) or multi-mode fiber (MMF) for the 40km reach? By M***r on 2026-02-23

A: This optical module is specifically engineered for Single-Mode Fiber (SMF). To achieve the maximum 40km transmission distance with optimal DDM readings and properly utilize the 1310nm/1550nm WDM wavelengths, you must use standard SMF cables. By admin on 2026-02-23
Q: We are running a mix of Cisco and Juniper switches. Will this 1.25G SFP BiDi module plug and play without triggering any third-party warning logs? By D***r on 2025-10-06

A: Absolutely. Our LS-SC31551G-40I modules undergo rigorous multi-brand compatibility testing. They are 100% plug-and-play and will seamlessly integrate into OEM switches from Cisco, Juniper, Arista, and others without throwing unverified transceiver error codes. By admin on 2025-10-07

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P***s

United States

Verified Purchase

5 .0

2026-07-09

Works seamlessly with my EdgeRouter. Reliable 1.25Gbps link over 15km of single-mode fiber.

34 Helpful vote Comments

A***r

Switzerland

Verified Purchase

5 .0

2026-06-05

No packet loss at all.

192 Helpful vote Comments

A***n

Indonesia

Verified Purchase

5 .0

2026-04-24

Bought 50 units for a massive IoT deployment. The WDM technology saves so much fiber, and the 1.25Gbps throughput is super consistent. Highly recommend these SFP transceivers for long-reach networking.

179 Helpful vote Comments

C***r

Finland

Verified Purchase

5 .0

2026-04-20

Fast shipping! Great industrial grade SFP transceiver for our harsh factory environment. (≧▽≦)

183 Helpful vote Comments

S***n

Canada

Verified Purchase

5 .0

2026-04-03

Excellent 1.25G BiDi transceiver! ⚡

83 Helpful vote Comments

A***a

Ukraine

Verified Purchase

5 .0

2026-03-08

Perfect 40km SFP for single-mode fiber.

59 Helpful vote Comments

M***s

Bolivia

Verified Purchase

5 .0

2026-02-13

Top notch Simplex SC connector.

39 Helpful vote Comments

M***l

Denmark

Verified Purchase

5 .0

2026-02-06

Tested the 40km Simplex SC SMF optics for a remote base station backhaul. Stable TX at 1310nm and RX at 1550nm with no packet loss. Great DDM readings under heavy load. (^_^)b

43 Helpful vote Comments

M***s

Finland

Verified Purchase

5 .0

2026-01-22

Great for campus fiber networking.

191 Helpful vote Comments

L***z

Belgium

Verified Purchase

5 .0

2025-12-13

Awesome wide-temperature SFP! Survives -40°C winter deployments easily. Will definitely buy more bulk.

26 Helpful vote Comments

A***r

Norway

Verified Purchase

5 .0

2025-12-01

Good price for industrial grade modules.

96 Helpful vote Comments

S***s

Sweden

Verified Purchase

5 .0

2025-11-27

Flawless OEM compatibility! (ง •_•)ง

183 Helpful vote Comments

R***n

Germany

Verified Purchase

5 .0

2025-11-16

Solid 40km SMF optic. The simplex SC connector clicked in securely without any issues.

204 Helpful vote Comments

M***n

Ethiopia

Verified Purchase

5 .0

2025-10-09

Real-time DOM works exactly as expected.

63 Helpful vote Comments

C***e

Thailand

Verified Purchase

5 .0

2025-09-24

Upgraded our industrial warehouse network using these LINK-PP modules. Excellent interoperability with our multi-brand switches. The extreme temp tolerance is a lifesaver for non-AC environments! Total cost of ownership is amazing.

83 Helpful vote Comments

D***s

Tunisia

Verified Purchase

5 .0

2025-09-11

Fast delivery and reliable gigabit link!

108 Helpful vote Comments

D***l

Canada

Verified Purchase

5 .0

2025-07-30

Stable 1310nm/1550nm connection.

154 Helpful vote Comments

J***s

Chile

Verified Purchase

5 .0

2025-07-30

Great WDM SFP for enterprise networking. Clean signal on the DFB laser.

192 Helpful vote Comments

C***s

Japan

Verified Purchase

4 .0

2025-07-24

Arrived a day late, but the 1.25G BiDi module works flawlessly in our outdoor cabinet.

17 Helpful vote Comments

R***s

Dominican Republic

Verified Purchase

5 .0

2025-07-20

Deployed these 1.25G SFP BiDi modules for a campus fiber network. Paired perfectly with our Cisco switches. The DOM feature helps monitor the -40 to 85°C outdoor temps accurately. Solid!

183 Helpful vote Comments

E***s

Canada

Verified Purchase

5 .0

2025-05-20

The DOM functionality gives me real-time diagnostics. Fantastic Bidi module for the price!

45 Helpful vote Comments

E***z

Finland

Verified Purchase

4 .0