Why should I choose this industrial grade LS-SM552G-20I transceiver instead of a commercial grade 2.5G SFP module for outdoor cell towers or roadside traffic cabinet deployments?

The LS-SM552G-20I is built specifically for harsh environmental conditions with an extended industrial operating temperature range of -40°C to +85°C (-40°F to 185°F), whereas commercial grade transceivers are only rated for 0°C to 70°C. It integrates hardened 1550nm DFB laser optics and ruggedized components engineered to withstand ambient temperature extremes, high humidity, and physical vibration commonly found in outdoor cell sites, traffic enclosures, and industrial utility substations.

Can I use this 20km 1550nm industrial SFP module for shorter distance fiber links, like 2km or 5km single mode fiber runs, without causing receiver overload?

Yes, you can use the LS-SM552G-20I on shorter SMF link distances, but you should check the optical light levels upon installation. The receiver sensitivity for this 20km module ranges down to -18dBm, while its DFB transmitter outputs between -5dBm and 0dBm. For fiber spans under 5km, we recommend utilizing the real-time Digital Optical Monitoring (DOM) feature in your switch CLI to verify that incoming RX power remains below the overload threshold. If RX power is too high, adding a small 3dB to 5dB LC optical attenuator will safeguard receiver longevity.

Is the LINK-PP LS-SM552G-20I compatible with enterprise and industrial switch brands such as Cisco, Juniper, Ubiquiti, Mikrotik, or Alcatel-Lucent, and does DOM telemetry work on all of them?

Yes. The LS-SM552G-20I complies strictly with SFP Multi-Source Agreement (MSA) standards and SFF-8472 digital diagnostic specifications. LINK-PP offers custom EEPROM compatibility coding for leading networking brands including Cisco, Juniper, Ubiquiti, Mikrotik, Alcatel-Lucent, Brocade, and generic industrial switches. Digital Optical Monitoring (DOM / DDM) is fully supported, allowing network management software (NMS) or switch CLI commands to retrieve real-time data for TX/RX power, laser bias current, module voltage, and operating temperature.

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LINK-PP LS-SM552G-20I 2.5G SFP 1550nm 20km DOM Duplex LC SMF Optical Transceiver Module (Industrial)

Name: LINK-PP LS-SM552G-20I 2.5G SFP 1550nm 20km DOM Duplex LC SMF Optical Transceiver Module (Industrial)
Brand: LINK-PP
SKU: 184112
Price: 16.856 USD
Availability: InStock
Rating: 4.9 (21 reviews)

# 184112

Product: LINK-PP LS-SM552G-20I 2.5G SFP 1550nm 20km DOM Duplex LC SMF Optical Transceiver Module (Industrial)
SKU: 184112
P/N: LS-SM552G-20I
Price: $ 19.6
Stock: 820 in Stock
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Product URL: https://www.l-p.com/products/479043.htm

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Compatible P/N:: LS-SM552G-20C | 20km; LS-SM552G-20I | 20km; LS-SM552G-40C | 40km; LS-SM552G-40I | 40km; LS-SM552G-80C | 80km; LS-SM552G-80I | 80km; LS-SM552G-A2C | 120km

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LINK-PP LS-SM552G-20I 2.5G SFP Specifications

The LINK-PP LS-SM552G-20I transceiver delivers data rates of up to 2.5Gbps over single-mode fiber (SMF), supporting transmission distances of up to 20km at a 1550nm wavelength. It ensures stable and consistent optical transmission.

LINK-PP Part Number	LS-SM552G-20I	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	2.5Gbps
Wavelength	1550nm	Max Cable Distance	20km
Connector	Duplex LC	Media	SMF
Transmitter Type	DFB	Receiver Type	PIN
TX Power	-6 to +1dBm	RX Power	-20 to -1dBm
Receiver Sensitivity	<-18dBm	Receiver Overload	-1dBm
Operating Temperature Range	-40 to 85°C	Protocols	MSA Compliant

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Q: Why should I choose this industrial grade LS-SM552G-20I transceiver instead of a commercial grade 2.5G SFP module for outdoor cell towers or roadside traffic cabinet deployments? By A***k on 2026-04-11

A: The LS-SM552G-20I is built specifically for harsh environmental conditions with an extended industrial operating temperature range of -40°C to +85°C (-40°F to 185°F), whereas commercial grade transceivers are only rated for 0°C to 70°C. It integrates hardened 1550nm DFB laser optics and ruggedized components engineered to withstand ambient temperature extremes, high humidity, and physical vibration commonly found in outdoor cell sites, traffic enclosures, and industrial utility substations. By admin on 2026-04-12
Q: Can I use this 20km 1550nm industrial SFP module for shorter distance fiber links, like 2km or 5km single mode fiber runs, without causing receiver overload? By J***n on 2025-05-13

A: Yes, you can use the LS-SM552G-20I on shorter SMF link distances, but you should check the optical light levels upon installation. The receiver sensitivity for this 20km module ranges down to -18dBm, while its DFB transmitter outputs between -5dBm and 0dBm. For fiber spans under 5km, we recommend utilizing the real-time Digital Optical Monitoring (DOM) feature in your switch CLI to verify that incoming RX power remains below the overload threshold. If RX power is too high, adding a small 3dB to 5dB LC optical attenuator will safeguard receiver longevity. By admin on 2025-05-14
Q: Is the LINK-PP LS-SM552G-20I compatible with enterprise and industrial switch brands such as Cisco, Juniper, Ubiquiti, Mikrotik, or Alcatel-Lucent, and does DOM telemetry work on all of them? By M***z on 2025-01-29

A: Yes. The LS-SM552G-20I complies strictly with SFP Multi-Source Agreement (MSA) standards and SFF-8472 digital diagnostic specifications. LINK-PP offers custom EEPROM compatibility coding for leading networking brands including Cisco, Juniper, Ubiquiti, Mikrotik, Alcatel-Lucent, Brocade, and generic industrial switches. Digital Optical Monitoring (DOM / DDM) is fully supported, allowing network management software (NMS) or switch CLI commands to retrieve real-time data for TX/RX power, laser bias current, module voltage, and operating temperature. By admin on 2025-01-30

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J***n

India

Verified Purchase

5 .0

2026-06-18

Tested on Cisco, Juniper, and Mikrotik switches for a 15km LC duplex link. DOM reading shows stable optical RX power near -10dBm across the span =)

49 Helpful vote Comments

L***g

Italy

Verified Purchase

5 .0

2026-02-16

Great thermal endurance inside our outdoor utility enclosure. Operating case temperature handles summer heat without laser bias drift or signal degrades.

87 Helpful vote Comments

C***k

Ireland

Verified Purchase

5 .0

2025-12-03

Replaced expensive OEM modules with this LS-SM552G-20I on our 2.5G Fibre Channel storage network. Syncs up immediately with zero packet loss or line attenuation.

2 Helpful vote Comments

N***a

Libyan Arab Jamahiriya

Verified Purchase

5 .0

2025-09-10

Needed 2.5Gbps optical transceivers with 1550nm wavelength for base station backhaul over single mode fiber. LINK-PP modules reported DDM stats instantly in our switch CLI :-D

21 Helpful vote Comments

M***e

Argentina

Verified Purchase

5 .0

2025-08-28

Tested compatibility on Ubiquiti, Brocade, and Alcatel-Lucent hardware for 2.5G Fibre Channel SAN replication. The LS-SM552G-20I transceivers locked sync in seconds, and DOM diagnostic values for laser temperature and optical power matched factory datasheet specifications perfectly =D

14 Helpful vote Comments

J***n

United States

Verified Purchase

5 .0

2025-06-26

Solid industrial 2.5G SFP transceiver. Flawless 20km link over SMF :)

66 Helpful vote Comments

J***n

Spain

Verified Purchase

5 .0

2025-06-01

Deployed these LS-SM552G-20I modules in unconditioned outdoor pole cabinets. Temperatures drop below freezing at night, yet optical light levels and DOM telemetry remain rock solid.

8 Helpful vote Comments

R***n

Libyan Arab Jamahiriya

Verified Purchase

4 .0

2025-01-25

Optical specs are spot on and DOM diagnostic readings match our handheld optical power meter perfectly. Great 1550nm 20km transceivers, but delivery to our German branch took two extra days.

66 Helpful vote Comments

C***z

Philippines

Verified Purchase

5 .0

2025-01-16

Fast shipping and sturdy duplex LC connector fit. The DFB 1550nm transmitter delivers strong optical signal over our 20km single mode fiber runs.

88 Helpful vote Comments

A***n

Hungary

Verified Purchase

5 .0

2025-01-13

Strict MSA compliance makes this industrial 2.5G SFP module a lifesaver for our multi-vendor fiber environment. We tested 1550nm LC duplex single mode fiber connections up to 19km distance without attenuation issues. Optical receiver sensitivity held steady at -18dBm.

96 Helpful vote Comments

W***l

Maldives

Verified Purchase

5 .0

2025-01-13

Upgraded our wireless CPRI cellular backhaul nodes using these LINK-PP 2.5Gbps 1550nm 20km optical transceivers. The duplex LC interface fits securely and DFB laser output power measures at +0.8dBm on site. Zero bit errors over a 48-hour continuous soak test. Great alternative to costly OEM brands ;)

9 Helpful vote Comments

A***s

Spain

Verified Purchase

5 .0

2025-01-09

Plug and play, full 2.5Gbps speed achieved ;)

16 Helpful vote Comments

S***r

France

Verified Purchase

5 .0

2025-01-08

Installed these 1550nm 20km LC duplex transceivers in our campus core switches. Attenuation over 16km SMF fiber was well under budget, and DDM diagnostics show stable operating temperatures between -15℃ and 42℃. Excellent choice for budget-conscious enterprise infrastructure deployments.

37 Helpful vote Comments

C***r

Canada

Verified Purchase

5 .0

2025-01-07

Excellent 1550nm industrial optics! =D

39 Helpful vote Comments

H***s

Republic of Korea

Verified Purchase

5 .0

2024-12-27

We bought a batch of LS-SM552G-20I industrial SFP transceivers for a 18km single mode fiber link between municipal substation sites. Receiver sensitivity stayed well within specification, and DDM telemetry integrates seamlessly with our Zabbix network monitoring system via SNMP. Outstanding stability under harsh weather conditions.

19 Helpful vote Comments

B***r

United Kingdom

Verified Purchase

5 .0

2024-12-22

Best value industrial 2.5G optical transceiver module.

30 Helpful vote Comments

J***s

Ukraine

Verified Purchase

5 .0

2024-11-11

Ideal 2.5G SFP transceivers for our home lab 2.5G NAS storage link and Mikrotik switch setup. DDM diagnostic telemetries display accurately without issues.

42 Helpful vote Comments

J***z

Singapore

Verified Purchase

4 .0

2024-10-19

The LS-SM552G-20I industrial optics perform flawlessly at full 2.5Gbps rate over our 15km fiber ring. I only deduct one star because the shipping box arrived slightly crumpled, though the internal anti-static bubble packaging kept the optics safe.

38 Helpful vote Comments

E***n

Cambodia

Verified Purchase

5 .0

2024-09-11

Deployed 40 pieces across regional server rooms and roadside enclosures. The DDM diagnostic feature is critical for our preventative maintenance, correctly reporting laser bias current, supply voltage, and internal thermal metrics to our NMS. Quality build and prompt customer support.

5 Helpful vote Comments

E***s

Romania

Verified Purchase

5 .0

2024-03-26

Works out of the box.

95 Helpful vote Comments

B***a

Libyan Arab Jamahiriya

Verified Purchase

5 .0

2024-03-19

Ordered 20 units for industrial switch network upgrades. MSA compliant spec made compatibility effortless across mixed vendor hardware. Will buy again! :-)

36 Helpful vote Comments