Does the LS-SM3101-20I 155M SFP support Fast Ethernet line rates?

Yes, it is fully compatible with both Fast Ethernet and SONET protocols.

Can this transceiver survive in unventilated outdoor metal boxes during extreme summer heat?

Yes, this is a true industrial-grade module rated to function continuously at ambient temperatures up to +85°C. It is specifically built to handle severe thermal conditions inside sealed enclosures.

Will this module work across a 25km single-mode fiber run if the fiber line has zero splices?

The official specification threshold is 20km based on typical fiber attenuation budgets. While a perfectly clean line might link up, we cannot guarantee reliable data transmission beyond 20km.

Does this module feature a single LC connector or a duplex LC connector arrangement?

It utilizes a standard duplex LC interface, requiring two separate fiber strands for simultaneous transmission and reception. One strand handles the upstream signal while the other handles the downstream.

Does the LS-SM3101-20I module require any special commands to enable the DOM features on standard enterprise switches?

No, the SFF-8472 digital diagnostics functions are automatically active through the hardware interface. Your switch operating system should read the optical parameters natively.

Breadcrumb: Home; Products; Optics Transceivers | SFP Modules; 1/2/4G Transceiver Modules; 100M SFP; 184038

Click to open expanded view

LINK-PP LS-SM3101-20I 155M SFP 1310nm 20km Duplex LC DOM SMF Optical Transceiver Module (Industrial)

Name: LINK-PP LS-SM3101-20I 155M SFP 1310nm 20km Duplex LC DOM SMF Optical Transceiver Module (Industrial)
Brand: LINK-PP
SKU: 184038
Price: 6.622 USD
Availability: InStock
Rating: 4.9 (21 reviews)

# 184038

Product: LINK-PP LS-SM3101-20I 155M SFP 1310nm 20km Duplex LC DOM SMF Optical Transceiver Module (Industrial)
SKU: 184038
P/N: LS-SM3101-20I
Price: $ 7.7
Stock: 649 in Stock
Sold: 710
Product URL: https://www.l-p.com/products/478969.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

21 Reviews

5 Questions

Request Stock

710 Sold

$ 7.7

Free shipping over $600, If you need a more favorable price, please contact us directly.

Qty (pcs) :

Unit Price :

$ 7.7

100

$ 7.315

1000

$ 7.084

3000

$ 6.853

6000

$ 6.622

Manufacture: LINK-PP

P/N: LS-SM3101-20I

Compatible:: LINK-PP

Compatible P/N:: LS-SM3101-10C | 10km; LS-SM3101-10I | 10km; LS-SM3101-15C | 15km; LS-SM3101-20C | 20km; LS-SM3101-20I | 20km; LS-SM3101-40C | 40km; LS-SM3101-40I | 40km; LS-SM5501-80C | 80km; LS-SM5501-80I | 80km; LS-SM5501-A2C | 120km; LS-SM5501-A2I | 120km

Shipping:

To Be Negotiated

Free Shipping

Can't deliver

to United States via {{now_chooseship?now_chooseship.name:''}}

Estimated delivery time : {{now_chooseship?now_chooseship.datemin:''}}-{{now_chooseship?now_chooseship.datemax:''}} days. See details

5-Year Warranty 30-Day Returns 30-Day Exchange

Stock:

{{parseInt(detail_data.left_num) ? detail_data.left_num +' in Stock' :detail_data.zeroStockOrder==0?'Out of Stock':'Available'}} .

Quantity:

( Min. Order {{detail_data.prodInfo.minimum_ordered_quantity}} )

undeliverable

Total Price:

{{ detail_data.displayed_price.unit_prefix }} {{ detail_data.displayed_price.original_total_price }} ( {{ detail_data.displayed_price.rate_of_discount }}% OFF ) {{detail_data.displayed_price.ex_sell_type}}

Add to wish

Specifications

Specification
Videos
Matching Products
Download
Q&A
Customer Reviews

LINK-PP LS-SM3101-20I 155M SFP Specifications

LS-SM3101-20I redefines resilient networking as an industrial-grade 155M SFP single-mode transceiver, harnessing a 1310nm FP laser and PIN photodetector to sustain flawless 20km transmissions across a punishing -40°C to +85°C thermal envelope.

LINK-PP Part Number	LS-SM3101-20I	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	155Mbps
Wavelength	1310nm	Max Cable Distance	20km
Connector	Duplex LC	Media	SMF
Transmitter Type	FP	Receiver Type	PIN
TX Power	-14 to -8dBm	RX Power	-32 to -6dBm
Receiver Sensitivity	-32dBm	DOM Support	Yes
Operating Temperature Range	-40 to 85°C	Protocols	IEEE802.3ab, GR-468, MSA Compliant

Videos

Matching Products

Pictures

ID#

Description

Price

Stock

Add to Cart

Download

Product Drawing

PDF
LS-SM3101-20I.pdf

Questions & Answers
Ask a Question

No data

Q: Does the LS-SM3101-20I 155M SFP support Fast Ethernet line rates? By L***s on 2025-12-03

A: Yes, it is fully compatible with both Fast Ethernet and SONET protocols. By admin on 2025-12-04
Q: Can this transceiver survive in unventilated outdoor metal boxes during extreme summer heat? By I***s on 2025-11-24

A: Yes, this is a true industrial-grade module rated to function continuously at ambient temperatures up to +85°C. It is specifically built to handle severe thermal conditions inside sealed enclosures. By admin on 2025-11-25
Q: Will this module work across a 25km single-mode fiber run if the fiber line has zero splices? By K***n on 2025-09-13

A: The official specification threshold is 20km based on typical fiber attenuation budgets. While a perfectly clean line might link up, we cannot guarantee reliable data transmission beyond 20km. By admin on 2025-09-14
Q: Does this module feature a single LC connector or a duplex LC connector arrangement? By J***n on 2025-07-30

A: It utilizes a standard duplex LC interface, requiring two separate fiber strands for simultaneous transmission and reception. One strand handles the upstream signal while the other handles the downstream. By admin on 2025-07-31
Q: Does the LS-SM3101-20I module require any special commands to enable the DOM features on standard enterprise switches? By G***s on 2025-04-09

A: No, the SFF-8472 digital diagnostics functions are automatically active through the hardware interface. Your switch operating system should read the optical parameters natively. By admin on 2025-04-10

Customer Reviews
Write a Review

{{stardata.star}}

{{comment.count}} reviews
5 Stars

{{comment.star5}}%

4 Stars

{{comment.star4}}%

3 Stars

{{comment.star3}}%

2 Stars

{{comment.star2}}%

1 Star

{{comment.star1}}%

All Reviews ({{comment.star_num?comment.star_num:comment.count}})

All Reviews

5 stars only

4 stars only

3 stars only

2 stars only

1 star only
Reviews with Pictures ( {{comment.pic_comment}} )
See All Reviews

No data

C***e

Venezuela

Verified Purchase

5 .0

2026-01-10

Running these on our substation backbone routers. The 1310nm FP laser holds up perfectly against heavy electrical interference, maintaining zero frame loss over months of continuous operation.

42 Helpful vote Comments

C***n

Switzerland

Verified Purchase

5 .0

2026-01-02

Our old commercial-grade SFP modules kept dropping links in the summer heat, but these industrial-grade optical transceivers have kept us at 100% uptime.

74 Helpful vote Comments

B***s

Denmark

Verified Purchase

5 .0

2025-12-31

The EEPROM coding is completely compliant with standard SFP Multi-Source Agreements. It worked instantly in our mixed-vendor rack.

44 Helpful vote Comments

G***s

United Kingdom

Verified Purchase

5 .0

2025-12-26

Fast delivery, low power consumption, and instant link up on our 155Mbps SONET equipment. ⚡

27 Helpful vote Comments

E***d

Greece

Verified Purchase

5 .0

2025-11-21

The sensitivity on the PIN photodetector is impressive, maintaining a solid lock even on aging single-mode fiber infrastructure.

33 Helpful vote Comments

B***s

Belgium

Verified Purchase

4 .0

2025-11-14

These 155M SFP optical transceivers perform flawlessly in our industrial loop networks, though the standard customs clearance delayed our project timeline by three days. Order well in advance for large rollouts.

11 Helpful vote Comments

B***r

Bangladesh

Verified Purchase

5 .0

2025-11-08

Picked up a dozen of these LS-SM3101-20I modules for a wind farm telemetry network. Over 15km of single-mode fiber and the optical budget still has plenty of headroom.

23 Helpful vote Comments

J***s

Italy

Verified Purchase

5 .0

2025-10-26

Standardizing on these for all our legacy 155Mbps cell tower links. Cheap, reliable, and tough as nails.

38 Helpful vote Comments

A***t

Norway

Verified Purchase

5 .0

2025-10-08

We procured a large batch of these 155M SFP transceivers to maintain legacy SONET/SDH edge links for a regional telecom network. The dual LC connectors snap firmly into place, and the internal FP laser exhibits incredibly tight spectral tolerance at 1310nm. Across our 20km single-mode fiber footprint, optical loss remained safely within the module's engineered limits. Having true SFF-8472 diagnostic functions at this price point allows us to maintain strict carrier-grade SLAs without overspending on OEM-branded components.

95 Helpful vote Comments

F***t

United States

Verified Purchase

5 .0

2025-09-22

Tested these inside uncooled roadside enclosures during summer peaks hitting 45°C ambient. The industrial-grade design handles the internal enclosure thermal build-up without breaking a sweat.

65 Helpful vote Comments

D***l

Netherlands

Verified Purchase

5 .0

2025-09-10

Our team recently executed a comprehensive network overhaul, replacing aging transceivers with the LINK-PP LS-SM3101-20I within our outdoor smart grid cabinets. Running over diverse single-mode fiber paths averaging 18km, these 1310nm duplex LC modules proved highly resilient against localized electromagnetic fields. Real-time DOM telemetry integrated seamlessly into our SNMP polling engine, providing clean readouts of laser bias and receiving power. The industrial-grade thermal ratings ensure these modules will outlast the host hardware in our demanding climate zones.

122 Helpful vote Comments

D***d

Ireland

Verified Purchase

5 .0

2025-08-09

Perfect option for manufacturing plant floor deployments where temperature control is non-existent.

59 Helpful vote Comments

H***g

Germany

Verified Purchase

5 .0

2025-08-01

We deployed 80 units of the LS-SM3101-20I across several remote water treatment facilities requiring deterministic 155Mbps connections. Utilizing single-mode fiber (SMF) over a 12km topology, the 1310nm FP laser combined with the PIN receiver yielded a remarkably stable power budget margin of over 6dB. The standout feature is the full SFF-8472 digital diagnostics implementation, allowing our centralized monitoring system to flag voltage or thermal fluctuations well before a link failure occurs. Exceptional hardware value for municipal infrastructure upgrades.

106 Helpful vote Comments

E***r

Sweden

Verified Purchase

5 .0

2025-07-17

Spanning a solid 19km between two remote pump stations and the PIN photodetector still catches a crisp signal.

18 Helpful vote Comments

E***t

Guatemala

Verified Purchase

4 .0

2025-07-03

Had to wait an extra week for custom multi-vendor EEPROM coding on a batch of 200 units, but the pricing and performance make up for it. Zero failures across our rural CCTV fiber rings.

12 Helpful vote Comments

C***w

Portugal

Verified Purchase

5 .0

2025-06-23

Left a pair running a heavy traffic loop for a week straight—zero bit errors recorded on our test set.

25 Helpful vote Comments

C***x

Finland

Verified Purchase

5 .0

2025-05-25

These run notably cooler than our old 155Mbps transceivers, helping to keep our tight power budgets in check.

27 Helpful vote Comments

H***e

France

Verified Purchase

5 .0

2025-05-18

Latches securely into place with zero wiggle. Optical attenuation across the duplex LC interface is minimal, keeping our 20km single-mode fiber links running at baseline speeds.

43 Helpful vote Comments

G***s

Austria

Verified Purchase

5 .0

2025-04-29

Swapped these out live on a production switch without a single glitch or system reboot required.

68 Helpful vote Comments

D***s

Dominican Republic

Verified Purchase

5 .0

2025-04-21

Real-time DOM telemetry is incredibly precise on these. Being able to track transceiver temp and bias current remotely saves our field techs a ton of windshield time.

54 Helpful vote Comments

C***d

Spain

Verified Purchase

5 .0

2025-03-12

Operating smoothly at -30°C in our sub-arctic outdoor monitoring stations. True industrial wide-temperature performance. ❄️

51 Helpful vote Comments