Will this connect directly to my existing OS2 cables, and is it definitely a Simplex SC port?

Spot on. The interface features a standard Simplex SC connector and the module is specifically tuned for Single Mode Fiber (SMF). It is perfectly adaptable to your standard OS1/OS2 optical patch cables for reach distances up to 20km.

I'm looking to roll out around 300 units for a new campus network upgrade. Do you guys offer volume discounts for bulk data center deployment?

Absolutely. We have tiered pricing tiers tailored for bulk purchases. For a 300-piece rollout, please hit up our sales team via Live Chat or email, and we’ll get you a solid customized quote to ensure you get the best price-per-port value.

Hi guys, we run a mixed rack of Cisco Catalyst and Arista switches. Will this LS-SC31491G-20C module trigger any "unsupported transceiver" warnings?

No worries there! This 1G BiDi SFP strictly complies with SFP MSA standards and is thoroughly tested for multi-vendor interoperability. It’s truly plug-and-play on Cisco, Arista, Juniper, and most major switch brands without throwing any OEM vendor lock-in errors.

Is the DOM feature fully compliant with SFF-8472? We need accurate real-time diagnostic readings for our central monitoring system.

Yes, it is fully SFF-8472 compliant. The built-in Digital Optical Monitoring (DOM/DDM) accurately reports real-time telemetry on temperature, voltage, laser bias current, and TX/RX optical power, integrating smoothly with your NMS for proactive maintenance.

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LINK-PP LS-SC31491G-20C 1G SFP BiDi 1310nm-TX/1490nm-RX 20km Simplex SC DOM SMF Optical Transceiver Module

Name: LINK-PP LS-SC31491G-20C 1G SFP BiDi 1310nm-TX/1490nm-RX 20km Simplex SC DOM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 199260
Price: 7.31 USD
Availability: InStock
Rating: 5 (51 reviews)

# 199260

Product: LINK-PP LS-SC31491G-20C 1G SFP BiDi 1310nm-TX/1490nm-RX 20km Simplex SC DOM SMF Optical Transceiver Module
SKU: 199260
P/N: LS-SC31491G-20C
Price: $ 8.5
Stock: 310 in Stock
Sold: 790
Product URL: https://www.l-p.com/products/489587.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

51 Reviews

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Manufacture: LINK-PP

P/N: LS-SC31491G-20C

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-SC31491G-20C 1G BiDi SFP Specifications

The LINK-PP LS-SC31491G-20C is a high-performance 1.25Gbps BiDi transceiver designed for single mode fiber networks. This hot-pluggable optical module strictly complies with SFP MSA and SFF-8472 standards. Operating on a single 3.3V power supply, the commercial-grade transceiver ensures stable gigabit connectivity across standard temperature environments from 0°C to 70°C.

LINK-PP Part Number	LS-SC31491G-20C	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	1.25Gbps
Wavelength	1310nm-TX/1490nm-RX	Max Cable Distance	20km
Connector	Simplex SC	Media	SMF
Transmitter Type	FP	Receiver Type	PIN
TX Power	-9 to 0dBm	RX Power	-23 to -1dBm
Receiver Sensitivity	<-23dBm	DOM Support	Yes
Operating Temperature Range	0 to 70°C	Protocols	SFP MSA, SFF-8472

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Q: Will this connect directly to my existing OS2 cables, and is it definitely a Simplex SC port? By R***r on 2026-03-08

A: Spot on. The interface features a standard Simplex SC connector and the module is specifically tuned for Single Mode Fiber (SMF). It is perfectly adaptable to your standard OS1/OS2 optical patch cables for reach distances up to 20km. By admin on 2026-03-08
Q: I'm looking to roll out around 300 units for a new campus network upgrade. Do you guys offer volume discounts for bulk data center deployment? By S***n on 2025-12-26

A: Absolutely. We have tiered pricing tiers tailored for bulk purchases. For a 300-piece rollout, please hit up our sales team via Live Chat or email, and we’ll get you a solid customized quote to ensure you get the best price-per-port value. By admin on 2025-12-27
Q: Hi guys, we run a mixed rack of Cisco Catalyst and Arista switches. Will this LS-SC31491G-20C module trigger any "unsupported transceiver" warnings? By D***s on 2025-07-24

A: No worries there! This 1G BiDi SFP strictly complies with SFP MSA standards and is thoroughly tested for multi-vendor interoperability. It’s truly plug-and-play on Cisco, Arista, Juniper, and most major switch brands without throwing any OEM vendor lock-in errors. By admin on 2025-07-24
Q: Is the DOM feature fully compliant with SFF-8472? We need accurate real-time diagnostic readings for our central monitoring system. By S***g on 2025-04-17

A: Yes, it is fully SFF-8472 compliant. The built-in Digital Optical Monitoring (DOM/DDM) accurately reports real-time telemetry on temperature, voltage, laser bias current, and TX/RX optical power, integrating smoothly with your NMS for proactive maintenance. By admin on 2025-04-17

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J***g

India

Verified Purchase

5 .0

2026-04-26

Works flawlessly with my TP-Link switch!

171 Helpful vote Comments

W***s

Costa Rica

Verified Purchase

5 .0

2026-04-20

Reliable gigabit link over 20km. SFF-8472 compliance makes fiber monitoring a breeze.

134 Helpful vote Comments

D***e

Poland

Verified Purchase

5 .0

2026-04-15

Easy gigabit fiber network upgrade.

44 Helpful vote Comments

R***r

Portugal

Verified Purchase

5 .0

2026-04-08

Fast shipping for our bulk 1G BiDi order. Consistent TX power across all units.

220 Helpful vote Comments

T***n

United Kingdom

Verified Purchase

5 .0

2026-03-25

Great for extending network to outdoor cabinets. Commercial temp handles the job perfectly. ☀️

46 Helpful vote Comments

R***t

Ecuador

Verified Purchase

5 .0

2026-03-23

Perfect 20km BiDi SFP for our network.

43 Helpful vote Comments

M***r

Viet Nam

Verified Purchase

5 .0

2026-03-05

Rolled out 50 of these 1310nm-TX/1490nm-RX SFPs in edge cabinets. SFP MSA compatibility is spot on with Juniper and MikroTik. Survived 65°C temps without link drops. Great TCO for enterprise.

53 Helpful vote Comments

S***l

Colombia

Verified Purchase

5 .0

2026-03-03

OEM compatibility is legit. No vendor lock-in errors on our Aruba edge switches. ✌️

206 Helpful vote Comments

L***r

Ecuador

Verified Purchase

5 .0

2025-12-10

DOM features work exactly as expected.

54 Helpful vote Comments

M***t

Belgium

Verified Purchase

5 .0

2025-11-22

Plug and play optical transceiver.

151 Helpful vote Comments

M***s

Germany

Verified Purchase

5 .0

2025-11-04

This is so cheap and works so good

33 Helpful vote Comments

L***r

Mexico

Verified Purchase

5 .0

2025-10-24

Good WAP backhaul fiber optic solution.

57 Helpful vote Comments

M***z

Belgium

Verified Purchase

4 .0

2025-10-19

Delivery took an extra day, but the 1G BiDi SFP works perfectly on my switch.

13 Helpful vote Comments

K***a

Macao

Verified Purchase

5 .0

2025-10-19

I appreciate the quality of your products.

85 Helpful vote Comments

P***s

Singapore

Verified Purchase

5 .0

2025-10-08

SFP MSA compatible, no coding issues.

219 Helpful vote Comments

N***r

Philippines

Verified Purchase

5 .0

2025-09-21

Good optical transceiver module. DDM data is accurate on my Ubiquiti aggregation switch.

31 Helpful vote Comments

D***t

Poland

Verified Purchase

5 .0

2025-09-15

Single mode fiber connection is rock solid.

129 Helpful vote Comments

S***n

Ukraine

Verified Purchase

5 .0

2025-09-03

Used for a point-to-point 15km fiber link. Wavelength separation works flawlessly here.

190 Helpful vote Comments

Z***m

Denmark

Verified Purchase

5 .0

2025-08-10

Delivery was Fast. Service was excellent and the Transceiver Module are perfect.

53 Helpful vote Comments

B***l

Canada

Verified Purchase

5 .0

2025-08-02

Pushed these 1G single-mode fiber modules to 18km in a multi-brand switch environment. Zero packet loss. The simplex SC connector is sturdy. Perfect for bulk data center deployment!

227 Helpful vote Comments

S***e

Switzerland

Verified Purchase

5 .0

2025-07-10

Nice simplex SC DOM SMF transceiver. Halved our fiber strand usage instantly! ✂️

211 Helpful vote Comments

R***s

Portugal

Verified Purchase

5 .0

2025-06-29

Simplex SC connector clicks in perfectly. ✨

148 Helpful vote Comments

S***z

Macao

Verified Purchase

5 .0

2025-06-06

Upgraded the rural base station backhaul using these 20km SMF transceivers. The DOM function is a lifesaver for remote monitoring. Commercial temp 0-70°C holds up well in our enclosed racks.

129 Helpful vote Comments

P***s

Canada

Verified Purchase

4 .0

2025-05-26

Box was slightly dented upon arrival. The 1310nm/1490nm module itself is fine though.

6 Helpful vote Comments

W***l

Greece

Verified Purchase

5 .0

2025-05-14

Awesome 1G BiDi module for the price!

174 Helpful vote Comments

J***s

Spain

Verified Purchase

5 .0

2025-04-25

Tested these 20km BiDi modules for our campus WAP backhaul. Simplex SC interface saved us half the fiber! Flawless DOM readings on our Cisco gear. Solid TX/RX optical power.

100 Helpful vote Comments

B***l

Thailand

Verified Purchase

5 .0

2025-03-24

1310nm TX side is super stable.

187 Helpful vote Comments

J***g

Thailand

Verified Purchase

5 .0

2025-03-07

Solid 1G SFP for home gigabit NAS setup. Plug and play with standard SMF.

56 Helpful vote Comments

M***e

Poland

Verified Purchase

5 .0

2025-02-25

much Cheaper

94 Helpful vote Comments

A***o

Cambodia

Verified Purchase

5 .0

2025-01-31

i get the best selection and price

104 Helpful vote Comments

Y***i

United States

Verified Purchase

5 .0

2025-01-26

Nice Transaction and Fast shipping! Recommended Seller!

86 Helpful vote Comments

T***a

Macao

Verified Purchase

5 .0

2025-01-04

Fantastic, it's been a wonderful shopping, easy to put

88 Helpful vote Comments

A***i

Nepal

Verified Purchase

5 .0

2024-11-24

Quick service and great customer service. An excellent customer experience!

91 Helpful vote Comments

R***a

New Zealand

Verified Purchase

5 .0

2024-11-16

Great service, great products, delivered in advance of timescales published, excellent overall, thank you.

88 Helpful vote Comments

K***s

Singapore

Verified Purchase

5 .0

2024-11-10

Have made many purchase with l-p.com. They are very through with making sure the correct products ordered for correct and working. The product shipped from directly China and arrived quickly.

56 Helpful vote Comments

D***r

United States

Verified Purchase

5 .0

2024-09-26

Product was as advertised ... communication regarding shipment and delivery was excellent.

55 Helpful vote Comments

J***n

India

Verified Purchase

5 .0

2024-09-06

Good selection. Very good prices. Fast shipping.

45 Helpful vote Comments

L***i

Brunei Darussalam

Verified Purchase

5 .0

2024-06-06

First order on this website. It is very easy to find what I need and place the orders, will see how Fast it ships and if the product is as advertised.

55 Helpful vote Comments

W***m

Canada

Verified Purchase

5 .0

2023-11-26

What a wonderful shopping experience.

53 Helpful vote Comments

M***n

Philippines

Verified Purchase

5 .0