Can this industrial grade transceiver module be installed in outdoor roadside cabinets subject to sub-zero winters and hot summers?

Yes. This module is specifically built with an industrial-grade operating temperature range of -40°C to +85°C (-40°F to 185°F). It features ruggedized internal components designed for harsh environments, outdoor NEMA enclosures, cell tower base stations, and unconditioned industrial switches.

I noticed this optic transmits at 1550nm and receives at 1310nm. Do I need a different module on the opposite end of the fiber line?

Yes, because BiDi (Bi-Directional) optical communication operates on a single fiber strand using two distinct wavelengths. This 1550nm-TX/1310nm-RX transceiver must be paired at the far end with a complementary 1G BiDi module that transmits at 1310nm and receives at 1550nm (such as 1310nm-TX/1550nm-RX 3km SFP) for the link to establish.

Is this 1G BiDi SFP transceiver fully compatible with Cisco, MikroTik, and Ubiquiti switches without requiring special CLI commands?

Yes, absolutely. The LINK-PP LS-BL55311G-03I transceiver comes pre-coded with broad OEM compatibility. It works seamlessly plug-and-play on Cisco, MikroTik, Ubiquiti, Fortinet, Dell, and other major networking platforms. Standard DOM/DDM optical diagnostic monitoring is fully supported natively in switch management interfaces.

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

Name: LINK-PP LS-BL55311G-03I 1G BiDi SFP 1550nm-TX/1310nm-RX 3km DOM Simplex LC SMF Optical Transceiver Module (Industrial)
Brand: LINK-PP
SKU: 183775
Price: 5.934 USD
Availability: InStock
Rating: 4.9 (27 reviews)

# 183775

Product: LINK-PP LS-BL55311G-03I 1G BiDi SFP 1550nm-TX/1310nm-RX 3km DOM Simplex LC SMF Optical Transceiver Module (Industrial)
SKU: 183775
P/N: LS-BL55311G-03I
Price: $ 6.9
Stock: 670 in Stock
Sold: 320
Product URL: https://www.l-p.com/products/478724.htm

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Manufacture: LINK-PP

P/N: LS-BL55311G-03I

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-03I 1G BiDi SFP Specifications

The LINK-PP LS-BL55311G-03I is an industrial-temperature-rated, 1G BiDi SFP transceiver. By transmitting at 1550nm and receiving at 1310nm, it enables full-duplex data transfer on a single simplex LC fiber with a distance range of up to three kilometers.

LINK-PP Part Number	LS-BL55311G-03I	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	Receiver Overload	-1dBm
Operating Temperature Range	-40 to 85°C	Protocols	Fast Ethernet, Gigabit Fibre Channel, MSA Compliant

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Q: Can this industrial grade transceiver module be installed in outdoor roadside cabinets subject to sub-zero winters and hot summers? By A***n on 2026-02-13

A: Yes. This module is specifically built with an industrial-grade operating temperature range of -40°C to +85°C (-40°F to 185°F). It features ruggedized internal components designed for harsh environments, outdoor NEMA enclosures, cell tower base stations, and unconditioned industrial switches. By admin on 2026-02-13
Q: I noticed this optic transmits at 1550nm and receives at 1310nm. Do I need a different module on the opposite end of the fiber line? By A***r on 2025-02-11

A: Yes, because BiDi (Bi-Directional) optical communication operates on a single fiber strand using two distinct wavelengths. This 1550nm-TX/1310nm-RX transceiver must be paired at the far end with a complementary 1G BiDi module that transmits at 1310nm and receives at 1550nm (such as 1310nm-TX/1550nm-RX 3km SFP) for the link to establish. By admin on 2025-02-12
Q: Is this 1G BiDi SFP transceiver fully compatible with Cisco, MikroTik, and Ubiquiti switches without requiring special CLI commands? By S***s on 2024-07-22

A: Yes, absolutely. The LINK-PP LS-BL55311G-03I transceiver comes pre-coded with broad OEM compatibility. It works seamlessly plug-and-play on Cisco, MikroTik, Ubiquiti, Fortinet, Dell, and other major networking platforms. Standard DOM/DDM optical diagnostic monitoring is fully supported natively in switch management interfaces. By admin on 2024-07-23

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L***r

Ireland

Verified Purchase

5 .0

2026-06-02

Great budget-friendly optical transceiver module for enterprise networking. Single strand fiber setup was smooth and link stability is rock solid.

80 Helpful vote Comments

S***z

Lithuania

Verified Purchase

4 .0

2026-04-13

Modules work great in our outdoor cabinet at -20℃, rock solid 1G link. Loss of one star because outer shipping box arrived slightly crushed, though internal ESD bags kept transceivers safe. =)

48 Helpful vote Comments

E***n

Hungary

Verified Purchase

5 .0

2026-03-10

Seamless compatibility with Ubiquiti EdgeSwitch and Cisco Catalyst. Plugged in, link came up in two seconds. DOM monitoring displays real-time laser bias currents fine.

78 Helpful vote Comments

T***n

Indonesia

Verified Purchase

5 .0

2026-03-01

Flawless drop-in replacement for costly tier-1 OEM brand transceivers. We ran BER testing over a 3km spool of OS2 single mode fiber cable for 48 hours continuous. Zero loss, low attenuation delta, and rx power held steady at -12dBm. DDM optical monitoring provides accurate real-time temperature and supply voltage stats.

41 Helpful vote Comments

M***n

Japan

Verified Purchase

5 .0

2026-02-12

Plug and play. =D

31 Helpful vote Comments

J***l

Morocco

Verified Purchase

5 .0

2026-02-11

Needed industrial temp optics for an outdoor NEMA enclosure. Tested during a hot summer week and cold night, temperature DOM stayed well within spec. Highly recommended!

75 Helpful vote Comments

E***e

Finland

Verified Purchase

5 .0

2025-07-21

Good value for 1G BiDi SFP 3km module. DOM telemetry works flawlessly on edge routers. Easy deployment for our ISP access network =D

47 Helpful vote Comments

A***z

Austria

Verified Purchase

5 .0

2025-06-28

Solid industrial grade. :-D

55 Helpful vote Comments

A***t

Bangladesh

Verified Purchase

5 .0

2025-05-17

Deploys smoothly across our multi-vendor switch environment. We tested this industrial BiDi SFP on Cisco Catalyst 3850 and Dell PowerConnect switches. The switch CLI logged EEPROM data instantly without needing unsanctioned optic commands. Optical power budget is generous for our 2.8km span, and DOM optics module data matches our optical power meter readings within 0.2dBm.

66 Helpful vote Comments

B***z

Thailand

Verified Purchase

5 .0

2025-04-29

Extremely reliable optics for enterprise campus fiber backbones. The 1G BiDi SFP 1550nm-TX/1310nm-RX module established immediate link with our existing 1310nm-TX/1550nm-RX endpoint. Transmit power level was clean at -6dBm. If you are constrained on available fiber strands, these Simplex LC SMF transceivers are an essential network upgrade.

82 Helpful vote Comments

J***z

Libyan Arab Jamahiriya

Verified Purchase

4 .0

2025-04-28

Works fine for our campus optical network expansion. 1550nm-TX / 1310nm-RX link synced immediately over 2.2km single fiber. Packaging was plain cardboard box without much padding, but transceivers suffered no damage.

15 Helpful vote Comments

R***s

Philippines

Verified Purchase

5 .0

2025-04-26

Using these for industrial Ethernet street cabinet connections. Hardened -40 to 85℃ rating gives us total peace of mind during winter freezing temp. ;)

79 Helpful vote Comments

C***k

France

Verified Purchase

5 .0

2025-04-18

Installed this 1G BiDi SFP 1550nm-TX/1310nm-RX in our campus fiber link. Synced right away with the matching 1310-TX side on our Mikrotik switch. DDM readings are totally spot on.

35 Helpful vote Comments

E***s

United Kingdom

Verified Purchase

5 .0

2025-04-14

Ideal solution for remote substation networking where temperature resistance is non-negotiable. Standard commercial optics kept failing in summer heat inside unconditioned enclosures, but these industrial grade Link-PP modules haven't dropped a single packet. Full compatibility with HP ProCurve and Arista hardware right out of the box.

33 Helpful vote Comments

S***g

Morocco

Verified Purchase

5 .0

2025-02-22

Flawless optics.

31 Helpful vote Comments

B***l

Singapore

Verified Purchase

4 .0

2024-12-06

Solid industrial BiDi SFP for base station backhaul. Plugged into Cisco IE3000, DOM reports accurate optical power. Took 5 days instead of 3 to arrive, but product performance is flawless.

82 Helpful vote Comments

A***n

Macao

Verified Purchase

5 .0

2024-11-18

Outstanding performance for cell site base station backhaul. Operating in high-humidity outdoor cabinets where temps swing wildly. The industrial temperature rating (-40℃ to 85℃) is genuine—thermal testing showed zero bit errors under full traffic load. For single-strand fiber deployments requiring 1550nm TX and 1310nm RX, this transceiver module is unbeatable for reliability.

28 Helpful vote Comments

G***n

Poland

Verified Purchase

5 .0

2024-10-15

Replaced overpriced OEM optics with this LINK-PP LS-BL55311G-03I transceiver on Fortinet switches. Recognized immediately without EEPROM warnings. Very impressed with the build quality. :D

77 Helpful vote Comments

T***s

Russian Federation

Verified Purchase

5 .0

2024-10-11

Tested in our lab on Mikrotik CCR2004 and Netonix industrial switches. DOM reports full diagnostic metrics including laser bias, temperature, and optical power levels. Passed full-duplex line rate traffic testing with 1518 byte frames without any CRC errors. Best value industrial optic on the market currently. =)

97 Helpful vote Comments

K***r

Iran, Islamic Republic of

Verified Purchase

5 .0

2024-09-16

Running these across 2.5km single-mode fiber between two production buildings. 1550nm TX power and RX sensitivity match datasheet specs precisely. Will order more for next phase.

24 Helpful vote Comments

S***r

Canada

Verified Purchase

5 .0

2024-09-01

Perfect fit for our home lab 1G connection to garage NAS. BiDi technology saved my single-strand fiber run. Super fast shipping from Link-PP.

32 Helpful vote Comments

S***h

Macao

Verified Purchase

5 .0

2024-08-24

Works perfectly! ;)

58 Helpful vote Comments

T***l

United Arab Emirates

Verified Purchase

5 .0

2024-07-17

Great price, fast sync.

71 Helpful vote Comments

S***z

Brunei Darussalam

Verified Purchase

5 .0

2024-05-31

Ordered a batch of 20 for server room deployment. Excellent Simplex LC SMF optics, saved us half our fiber cabling cost. No frame drops after 72 hours under load. :-)

64 Helpful vote Comments

P***t

Canada

Verified Purchase

5 .0

2024-05-21

Using this single-mode BiDi SFP transceiver to link our main server room to a backup storage array 2km away. The Simplex LC interface simplified cable management tremendously inside our high-density patch panel. EEPROM coding was recognized as fully compatible without any console port warnings or forced commands needed. :-)

76 Helpful vote Comments

E***z

New Zealand

Verified Purchase

5 .0

2024-04-10

Upgraded our remote monitoring node over 1.8km SMF line. 1550nm/1310nm single fiber LC interface saved our leased line expense. Excellent performance.

18 Helpful vote Comments

A***n

Germany

Verified Purchase

5 .0

2024-04-05

We purchased 50 units for a municipal video surveillance network expansion over single-mode fiber. The LC simplex connection allowed us to double our node capacity on existing fiber trunks. Real-time DDM optical diagnostic telemetry integrated seamlessly into our SNMP monitoring system. Link-PP delivered consistent quality across the entire production batch. :-D

68 Helpful vote Comments