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.

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LINK-PP LS-BL55311G-03C 1G BiDi SFP 1550nm-TX/1310nm-RX 3km DOM Simplex LC SMF Optical Transceiver Module

Name: LINK-PP LS-BL55311G-03C 1G BiDi SFP 1550nm-TX/1310nm-RX 3km DOM Simplex LC SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 183770
Price: 5.59 USD
Availability: InStock
Rating: 4.9 (29 reviews)

# 183770

Product: LINK-PP LS-BL55311G-03C 1G BiDi SFP 1550nm-TX/1310nm-RX 3km DOM Simplex LC SMF Optical Transceiver Module
SKU: 183770
P/N: LS-BL55311G-03C
Price: $ 6.5
Stock: 790 in Stock
Sold: 810
Product URL: https://www.l-p.com/products/478719.htm

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

For Order Over $3000 Get $50.00 Off , Code: Linkpp50

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29 Reviews

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Manufacture: LINK-PP

P/N: LS-BL55311G-03C

Compatible:: LINK-PP; Ubiquiti

Compatible P/N:: LS-BL31551G-02C | 2km; LS-BL55311G-02C | 2km; LS-BL31551G-03C | 3km; LS-BL31551G-03I | 3km; LS-BL55311G-03C | 3km; LS-BL55311G-03I | 3km; LS-BL31491G-10C | 10km; LS-BL31491G-10I | 10km; LS-BL31551G-10C | 10km; LS-BL31551G-10I | 10km; LS-BL31551GE-10C | 10km; LS-BL49311G-10C | 10km; LS-BL49311G-10I | 10km; LS-BL49551G-10C | 10km; LS-BL49551G-10I | 10km; LS-BL55311G-10C | 10km; LS-BL55311G-10I | 10km; LS-BL55311GE-10C | 10km; LS-BL55491G-10C | 10km; LS-BL55491G-10I | 10km; LS-BL31551G-15C | 15km; LS-BL31491G-20C | 20km; LS-BL31491G-20I | 20km; LS-BL31551G-20C | 20km; LS-BL31551G-20I | 20km; LS-BL49311G-20C | 20km; LS-BL49311G-20I | 20km; LS-BL49551G-20C | 20km; LS-BL55311G-20C | 20km; LS-BL55311G-20I | 20km; LS-BL55491G-20C | 20km; LS-BL31491G-40C | 40km; LS-BL31491G-40I | 40km; LS-BL31551G-40C | 40km; LS-BL31551G-40I | 40km; LS-BL49311G-40C | 40km; LS-BL49311G-40I | 40km; LS-BL55311G-40C | 40km; LS-BL55311G-40I | 40km; LS-BL31551G-60C | 60km; LS-BL31551G-60I | 60km; LS-BL49551G-60C | 60km; LS-BL55311G-60C | 60km; LS-BL55311G-60I | 60km; LS-BL55491G-60C | 60km; LS-BL27331G-80C | 80km; LS-BL33271G-80C | 80km; LS-BL49551G-80C | 80km; LS-BL49551G-80I | 80km; LS-BL55491G-80C | 80km; LS-BL55491G-80I | 80km; LS-BL49551G-A0C | 100km; LS-BL49551G-A0I | 100km; LS-BL55491G-A0C | 100km; LS-BL55491G-A0I | 100km; LS-BL49551G-A2C | 120km; LS-BL49551G-A2I | 120km; LS-BL55491G-A2C | 120km; LS-BL55491G-A2I | 120km; LS-BL49551G-A5C | 150km; LS-BL49551G-A5I | 150km; LS-BL55491G-A5C | 150km; LS-BL55491G-A5I | 150km; LS-BL49551G-A6C | 160km; LS-BL49551G-A6I | 160km; LS-BL55491G-A6C | 160km; LS-BL55491G-A6I | 160km

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LINK-PP LS-BL55311G-03C 1G BiDi SFP Specifications

The LINK-PP LS-BL55311G-03C 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.

LINK-PP Part Number	LS-BL55311G-03C	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

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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

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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

C***z

Indonesia

Verified Purchase

5 .0

2026-01-14

Flawless DOM readings on my Ubiquiti Dream Machine. The 1550nm TX power is very stable. =)

63 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

J***y

Libyan Arab Jamahiriya

Verified Purchase

5 .0

2025-08-11

Solid value for enterprise procurement. The metal housing feels premium and clicks securely into the cage.

40 Helpful vote Comments

K***z

Ukraine

Verified Purchase

5 .0

2025-08-09

The simplex LC interface is a lifesaver for our congested fiber patch panels. Great product. ;)

25 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

D***s

Germany

Verified Purchase

5 .0

2025-06-28

Solid indoor transceiver.

83 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

T***k

Turkey

Verified Purchase

5 .0

2025-01-13

Nice simplex lc module.

53 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

N***t

South Africa

Verified Purchase

5 .0

2024-12-16

Seamless plug and play with our HPE Aruba access switches. No invalid transceiver warnings at all.

27 Helpful vote Comments

J***r

Philippines

Verified Purchase

5 .0

2024-12-07

Good 1G SFP for the price. Deployed 20 for our campus network aggregation layer without issues.

21 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

I***g

Norway

Verified Purchase

5 .0

2024-04-06

I needed a cost-effective solution for a multi-brand switch topology. This 1550nm-TX/1310nm-RX optic negotiated 1000BASE-BX instantly across Juniper and Mikrotik edge devices. Optical attenuation is well within margin for a 2.5km drop. The build quality is excellent for commercial indoor usage. A solid network upgrade choice.

9 Helpful vote Comments

N***n

United Kingdom

Verified Purchase

5 .0

2024-03-07

Works perfectly for my home 10G NAS setup stepped down to 1G. Simplex fiber is so clean. :D

71 Helpful vote Comments

J***s

Germany

Verified Purchase

5 .0