What type of fiber optic cable is required for this 3km transceiver?

It requires standard Single-Mode Fiber with a Simplex LC connector. You only need a single strand of fiber for both transmitting and receiving data, which maximizes your cabling infrastructure.

Will this simplex LC module work with standard Cisco Catalyst edge switches?

Yes, it is fully MSA compliant and codes seamlessly with mainstream commercial switches including Cisco, HPE, and Juniper without triggering unauthorized optic warnings.

Does this LS-BL55311G-03C module require a specific pairing on the other end?

Yes, since it transmits at 1550nm and receives at 1310nm, you must pair it with a 1310nm-TX/1550nm-RX BiDi transceiver on the other end of the single-mode fiber to establish the link.

Is this 1G optical module suitable for outdoor unconditioned enclosures?

This specific model features a commercial temperature range of 0 to 70C. For outdoor unconditioned cabinets, we advise using the industrial grade version (LS-BL55311G-03I) to ensure hardware stability in extreme weather.

Does the transceiver support digital diagnostic monitoring for optical health?

Yes, it fully supports standard DDM/DOM parameters. You can monitor real-time RX power, TX power, voltage, and temperature directly through your network management system.

Breadcrumb: Home; Products; Optics Transceivers | SFP Modules; 1/2/4G Transceiver Modules; 1G BiDi SFP; 220373

Click to open expanded view

Ubiquiti UF-SM-1G-S Compatible LINK-PP 1G BiDi SFP 1550nm-TX/1310nm-RX 3km DOM Simplex LC SMF Optical Transceiver Module

Name: Ubiquiti UF-SM-1G-S Compatible LINK-PP 1G BiDi SFP 1550nm-TX/1310nm-RX 3km DOM Simplex LC SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 220373
Price: 5.59 USD
Availability: InStock
Rating: 4.9 (20 reviews)

# 220373

Product: Ubiquiti UF-SM-1G-S Compatible LINK-PP 1G BiDi SFP 1550nm-TX/1310nm-RX 3km DOM Simplex LC SMF Optical Transceiver Module
SKU: 220373
P/N: LS-BL55311G-03C
Price: $ 6.5
Stock: 868 in Stock
Sold: 672
Product URL: https://www.l-p.com/products/495235.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

20 Reviews

5 Questions

Request Stock

672 Sold

$ 6.5

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

Qty (pcs) :

Unit Price :

$ 6.5

100

$ 6.175

1000

$ 5.98

3000

$ 5.785

6000

$ 5.59

Manufacture: LINK-PP

P/N: LS-BL55311G-03C

Compatible:: LINK-PP; Ubiquiti

Compatible P/N:: UACC-OM-SM-1G-S | 3km; UF-SM-1G-S | 3km

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

Ubiquiti UF-SM-1G-S Compatible LINK-PP 1G BiDi SFP Specifications

The Ubiquiti UF-SM-1G-S Compatible LINK-PP module is a 1.25 Gbps BiDi SFP optical transceiver that transmits at 1550nm and receives at 1310nm to provide full-duplex data communication over a single simplex LC fiber, with link distances of up to 3 km via single-mode fiber.

Ubiquiti Part Number	UF-SM-1G-S	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	1.25Gbps
Wavelength	1550nm-TX/1310nm-RX	Max Cable Distance	3km
Connector	Simplex LC	Media	SMF
Transmitter Type	FP	Receiver Type	PIN
TX Power	-15 to -8dBm	RX Power	-23 to -1dBm
Receiver Sensitivity	<-23dBm	DOM Support	Yes
Operating Temperature Range	0 to 70°C	Protocols	Fast Ethernet, Gigabit Fibre Channel, MSA Compliant

Videos

Matching Products

Pictures

ID#

Description

Price

Stock

Add to Cart

Download

Product Drawing

PDF
LS-BL55311G-03C.pdf

Questions & Answers
Ask a Question

No data

Q: What type of fiber optic cable is required for this 3km transceiver? By J***n on 2026-01-31

A: It requires standard Single-Mode Fiber with a Simplex LC connector. You only need a single strand of fiber for both transmitting and receiving data, which maximizes your cabling infrastructure. By admin on 2026-01-31
Q: Will this simplex LC module work with standard Cisco Catalyst edge switches? By R***t on 2025-11-20

A: Yes, it is fully MSA compliant and codes seamlessly with mainstream commercial switches including Cisco, HPE, and Juniper without triggering unauthorized optic warnings. By admin on 2025-11-20
Q: Does this LS-BL55311G-03C module require a specific pairing on the other end? By N***z on 2025-08-05

A: Yes, since it transmits at 1550nm and receives at 1310nm, you must pair it with a 1310nm-TX/1550nm-RX BiDi transceiver on the other end of the single-mode fiber to establish the link. By admin on 2025-08-06
Q: Is this 1G optical module suitable for outdoor unconditioned enclosures? By P***r on 2025-08-01

A: This specific model features a commercial temperature range of 0 to 70C. For outdoor unconditioned cabinets, we advise using the industrial grade version (LS-BL55311G-03I) to ensure hardware stability in extreme weather. By admin on 2025-08-02
Q: Does the transceiver support digital diagnostic monitoring for optical health? By A***s on 2024-06-07

A: Yes, it fully supports standard DDM/DOM parameters. You can monitor real-time RX power, TX power, voltage, and temperature directly through your network management system. By admin on 2024-06-07

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

G***s

Romania

Verified Purchase

5 .0

2026-06-03

Accurate DDM monitoring saves us time. We can check optical health directly from the router CLI.

68 Helpful vote Comments

A***r

Malaysia

Verified Purchase

5 .0

2026-03-24

Reliable optical transceiver for standard indoor deployments. Good alternative to expensive name brand optics.

3 Helpful vote Comments

K***n

Taiwan, Province of China

Verified Purchase

5 .0

2026-02-17

Standard MSA compatibility is spot on. Negotiates gigabit speeds immediately on single mode fiber.

74 Helpful vote Comments

S***z

Singapore

Verified Purchase

4 .0

2026-02-09

Ordered a batch for a server room upgrade. Box was slightly crushed during shipping. The 1G bidi sfps survived and work well, but the outer packaging needs better bubble wrap.

51 Helpful vote Comments

R***e

Indonesia

Verified Purchase

5 .0

2025-12-21

Five stars.

96 Helpful vote Comments

R***s

Singapore

Verified Purchase

5 .0

2025-11-30

Flawless Cisco compatibility.

19 Helpful vote Comments

I***z

Libyan Arab Jamahiriya

Verified Purchase

5 .0

2025-08-25

Fast link initialization. Works exactly as described for standard 1000BASE-BX networking. :-)

41 Helpful vote Comments

T***n

Thailand

Verified Purchase

5 .0

2025-07-26

We use these for short base station backhaul links. Commercial temp is fine since cabinets are cooled.

44 Helpful vote Comments

R***s

New Zealand

Verified Purchase

5 .0

2025-06-18

Good value optic.

55 Helpful vote Comments

M***z

Belgium

Verified Purchase

4 .0

2025-05-06

Decent shipping speed.

40 Helpful vote Comments

N***t

Brunei Darussalam

Verified Purchase

5 .0

2025-03-20

Saved my fiber strands =D

99 Helpful vote Comments

E***n

Brazil

Verified Purchase

5 .0

2025-01-12

We deployed 50 units of this LS-BL55311G-03C in our indoor data center. Paired with 1310nm-TX units, the 1G simplex LC SMF links are flawless over 2km. The SFF-8472 DOM metrics integrate perfectly with our SNMP monitoring. Excellent OEM compatibility with Cisco Catalyst switches. Zero dropped packets after a month.

81 Helpful vote Comments

F***s

Lithuania

Verified Purchase

5 .0

2025-01-08

As a network engineer handling campus fiber rollouts, these 3km bidi modules are perfect for short single-mode runs between buildings. The 1550nm DFB laser provides clean signal. I tested them on Aruba and Ubiquiti gear without any unrecognized transceiver errors. Highly reliable for our B2B networking needs. :-)

87 Helpful vote Comments

A***r

Germany

Verified Purchase

5 .0

2024-12-31

DOM works perfectly!

6 Helpful vote Comments

H***a

Japan

Verified Purchase

5 .0

2024-11-08

Installed these in our office floor switches. The 3km range is more than enough for our indoor fiber routing.

38 Helpful vote Comments

S***n

Bangladesh

Verified Purchase

5 .0

2024-08-14

Works great :)

51 Helpful vote Comments

S***l

Cambodia

Verified Purchase

5 .0

2024-07-12

Perfect 3km bidi SFP.

68 Helpful vote Comments

L***s

Macao

Verified Purchase

5 .0

2024-05-13

Evaluating these 1G BiDi SFP transceivers for enterprise procurement. The commercial temperature rating is fine for our climate-controlled server rooms. Real-time DDM tracks RX power accurately. Using simplex LC fiber saves us significant cabling costs on our 1.5km runs. Very stable hardware for our corporate LAN infrastructure.

3 Helpful vote Comments

S***s

Canada

Verified Purchase

4 .0

2024-04-12

Delivery was a bit slow over the weekend, but the simplex SFP works beautifully in our switch.

59 Helpful vote Comments

N***n

United Kingdom

Verified Purchase

5 .0