Is this LINK-PP LS-BL55311G-40I 1G BiDi SFP transceiver compatible with Cisco Catalyst, MikroTik, and Ubiquiti switches without vendor lock issues?

Yes, the LS-BL55311G-40I comes pre-coded for broad OEM and MSA compatibility, including Cisco, MikroTik, Ubiquiti, Netgear, and other standard networking gear. It supports hot-swappable auto-recognition without needing forced EEPROM CLI overrides.

What specific optic wavelength matching do I need on the remote end of this single strand fiber link?

Since this transceiver transmits at 1550nm (TX) and receives at 1310nm (RX), the opposite end of the single-strand fiber link must use a complementary 1G BiDi SFP transceiver with 1310nm-TX and 1550nm-RX (such as the LINK-PP LS-BL31551G-40I) to establish bidirectional communication.

Does the industrial temperature rating (-40°C to +85°C) cover real-time temperature reporting via DDM/DOM?

Yes, the LS-BL55311G-40I is an industrial-grade transceiver built for extreme environmental conditions. Integrated DDM/DOM (Digital Diagnostics Monitoring) allows network administrators to monitor real-time operating temperature, TX/RX optical power, supply voltage, and laser bias current via SNMP or switch management interfaces.

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LINK-PP LS-BL55311G-40I 1G BiDi SFP 1550nm-TX/1310nm-RX 40km DOM Simplex LC SMF Optical Transceiver Module (Industrial)

Name: LINK-PP LS-BL55311G-40I 1G BiDi SFP 1550nm-TX/1310nm-RX 40km DOM Simplex LC SMF Optical Transceiver Module (Industrial)
Brand: LINK-PP
SKU: 183769
Price: 8.17 USD
Availability: InStock
Rating: 5 (24 reviews)

# 183769

Product: LINK-PP LS-BL55311G-40I 1G BiDi SFP 1550nm-TX/1310nm-RX 40km DOM Simplex LC SMF Optical Transceiver Module (Industrial)
SKU: 183769
P/N: LS-BL55311G-40I
Price: $ 9.5
Stock: 1320 in Stock
Sold: 780
Product URL: https://www.l-p.com/products/478718.htm

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Manufacture: LINK-PP

P/N: LS-BL55311G-40I

Compatible:: LINK-PP

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-40I 1G BiDi SFP Specifications

The LINK-PP LS-BL55311G-40I 1G BiDi transceiver delivers stable 1.25 Gbps connectivity over single-mode fiber, supporting transmission distances of up to 40 km. It operates using a wavelength pair of 1550nm (TX) and 1310nm (RX), enabling efficient bidirectional communication over a single fiber strand.

LINK-PP Part Number	LS-BL55311G-40I	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	1.25Gbps
Wavelength	1550nm-TX/1310nm-RX	Max Cable Distance	40km
Connector	Simplex LC	Media	SMF
Transmitter Type	DFB BiDi	Receiver Type	PIN
TX Power	-5 to 0dBm	RX Power	-23 to -1dBm
Receiver Sensitivity	<-24dBm	Receiver Overload	-1dBm
Operating Temperature Range	-40 to 85°C	Protocols	Fast Ethernet, Gigabit Fibre Channel, MSA Compliant

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Q: Is this LINK-PP LS-BL55311G-40I 1G BiDi SFP transceiver compatible with Cisco Catalyst, MikroTik, and Ubiquiti switches without vendor lock issues? By J***z on 2026-06-22

A: Yes, the LS-BL55311G-40I comes pre-coded for broad OEM and MSA compatibility, including Cisco, MikroTik, Ubiquiti, Netgear, and other standard networking gear. It supports hot-swappable auto-recognition without needing forced EEPROM CLI overrides. By admin on 2026-06-23
Q: What specific optic wavelength matching do I need on the remote end of this single strand fiber link? By S***s on 2025-09-28

A: Since this transceiver transmits at 1550nm (TX) and receives at 1310nm (RX), the opposite end of the single-strand fiber link must use a complementary 1G BiDi SFP transceiver with 1310nm-TX and 1550nm-RX (such as the LINK-PP LS-BL31551G-40I) to establish bidirectional communication. By admin on 2025-09-28
Q: Does the industrial temperature rating (-40°C to +85°C) cover real-time temperature reporting via DDM/DOM? By A***g on 2024-02-13

A: Yes, the LS-BL55311G-40I is an industrial-grade transceiver built for extreme environmental conditions. Integrated DDM/DOM (Digital Diagnostics Monitoring) allows network administrators to monitor real-time operating temperature, TX/RX optical power, supply voltage, and laser bias current via SNMP or switch management interfaces. By admin on 2024-02-14

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M***t

Spain

Verified Purchase

5 .0

2026-06-01

Solid 1000BASE-BX40-U transceiver for budget-conscious ISP deployments. Optical power budget offers plenty of margin over 25km links.

2 Helpful vote Comments

A***s

Japan

Verified Purchase

5 .0

2026-01-05

Integrated the LS-BL55311G-40I into our utility substation fiber network across a 34km link. Hot-swappable installation went smoothly on HP ProCurve switches. The module maintained clean optical eye diagrams and zero bit errors during a 72-hour continuous stress test under full load. Excellent long-reach solution :-)

85 Helpful vote Comments

J***s

Denmark

Verified Purchase

5 .0

2025-12-07

Works perfectly. =D

18 Helpful vote Comments

A***r

France

Verified Purchase

5 .0

2025-10-09

Zero issues.

22 Helpful vote Comments

J***t

Morocco

Verified Purchase

5 .0

2025-08-10

Good quality 1550/1310 WDM SFP. Hot-pluggable design made replacing faulty legacy optics quick and painless.

44 Helpful vote Comments

E***l

India

Verified Purchase

5 .0

2025-05-22

Great value 1.25Gbps BiDi transceiver for base station backhaul. Recognized on MikroTik CCR2004 without any EEPROM vendor locking issues.

53 Helpful vote Comments

A***z

Iran, Islamic Republic of

Verified Purchase

5 .0

2025-02-15

Upgraded our municipal surveillance backhaul using the LS-BL55311G-40I single-mode SFP. Paired seamlessly with the matching 1310nm-TX/1550nm-RX modules on the remote end. Real-time DOM telemetry allows our network engineers to monitor light levels remotely, preventing potential fiber degradation downtime. Truly impressive industrial optics at a fraction of major OEM prices. =D

47 Helpful vote Comments

A***r

Republic of Korea

Verified Purchase

5 .0

2025-02-06

Bench tested the LINK-PP 1G BiDi 1550nm/1310nm 40km DOM module using an EXFO optical power meter before field installation. Optical insertion loss was consistent across the 1.25G link, and DOM reported exact optical power within 0.2 dB of our test set. Highly satisfied with thermal stability and transmission distance :-D

37 Helpful vote Comments

R***n

Malaysia

Verified Purchase

5 .0

2025-02-04

Flawless optics. ;)

90 Helpful vote Comments

A***h

Bulgaria

Verified Purchase

5 .0

2025-01-04

Replaced expensive OEM 1000BASE-EX BiDi transceivers in our municipal network. Handled sub-zero temperatures and high humidity without any link dropouts.

1 Helpful vote Comments

J***n

Canada

Verified Purchase

5 .0

2024-12-17

Installed this 1G BiDi SFP 40km 1550TX/1310RX optic in our remote outdoor cabinet. Synced instantly with our head-end switch over 32km single-mode fiber.

69 Helpful vote Comments

J***r

Nepal

Verified Purchase

4 .0

2024-11-18

The LS-BL55311G-40I optical transceiver performs as advertised across our 38km link, but delivery took two days longer than promised due to local carrier delay. Module itself is rock solid.

25 Helpful vote Comments

N***t

Iran, Islamic Republic of

Verified Purchase

5 .0

2024-10-19

100% recommended.

30 Helpful vote Comments

G***s

South Africa

Verified Purchase

5 .0

2024-10-06

Fully compatible.

1 Helpful vote Comments

N***n

France

Verified Purchase

5 .0

2024-08-23

We deployed 16 units of the LINK-PP LS-BL55311G-40I across our regional campus backbone links. Operating on a single strand LC fiber run over 30km, optical power levels read -7.1 dBm via DDM/DOM on Cisco Catalyst 3850 switches. The 1550nm-TX/1310nm-RX configuration paired seamlessly with our existing 1310nm-TX modules, cutting fiber leasing expenses by half! :D

55 Helpful vote Comments

T***s

South Africa

Verified Purchase

5 .0

2024-08-23

Competitive B2B pricing and genuine industrial grade components. DDM monitoring functions properly on our NMS netflow dashboard. Will keep LINK-PP as our primary optic supplier.

82 Helpful vote Comments

S***s

Malaysia

Verified Purchase

5 .0

2024-07-31

Plug and play.

72 Helpful vote Comments

G***n

Romania

Verified Purchase

5 .0

2024-07-24

Tested compatibility on Ubiquiti EdgeSwitch and FS patch panels. EEPROM loaded instantly without needing CLI override commands.

88 Helpful vote Comments

B***s

Australia

Verified Purchase

5 .0

2024-06-21

Deployed a batch of these industrial BiDi SFP transceivers in unheated solar-powered relay stations. Operating in extreme temperature swings between day and night, the laser bias current remains stable, and DDM accurately reports voltage and thermal specs. Highly recommended for rugged outdoor optical links ;)

5 Helpful vote Comments

V***s

Macao

Verified Purchase

5 .0

2024-06-18

Top quality.

73 Helpful vote Comments

E***z

Russian Federation

Verified Purchase

5 .0

2024-02-07

Needed a reliable simplex LC SMF optic for inter-building trunking. The 40km capability provides great headroom for spliced optical spans.

60 Helpful vote Comments

S***t

Cambodia

Verified Purchase

5 .0

2024-01-18

Fast shipping! :-)

20 Helpful vote Comments

S***s

Norway

Verified Purchase

5 .0

2024-01-17

Required industrial temperature ratings (-40C to 85C) for roadside traffic monitoring enclosures in Canada. DOM diagnostics give reliable temperature and TX power metrics directly to our SNMP monitor. =)

83 Helpful vote Comments

B***g

Turkey

Verified Purchase

5 .0

2024-01-06

Using these single mode LC simplex SFPs for wireless ISP tower links. Cuts cabling complexity in half while maintaining reliable line rate throughput.

77 Helpful vote Comments