What is the recommended operating temperature range for this 1550nm 2.5Gbps SFP module when deployed in outdoor cabinets or unconditioned equipment rooms?

The standard LS-SM552G-40C model features a commercial operating case temperature range of 0°C to 70°C (32°F to 158°F), which is suitable for standard indoor server rooms and thermally managed outdoor enclosures. If your deployment requires harsh environment reliability—such as unheated pole cabinets or roadside base stations—we also offer the industrial grade version (part number LS-SM552G-40I) which supports an extended operating temperature range from -40°C to 85°C.

Can we use this LINK-PP LS-SM552G-40C 2.5G SFP transceiver on short-distance single mode fiber runs, like 2km or 5km campus links, without saturating or damaging the optical receiver?

Yes, you can use the LS-SM552G-40C module on shorter SMF link distances, but you should verify your optical light levels. The receiver overload threshold for this module is -1dBm and receiver sensitivity is -20dBm, while the DFB laser transmitter power ranges from -2 to +3dBm. If your fiber span is under 10km, we recommend checking DOM/DDM real-time optical power or adding a 5dB to 10dB LC optical attenuator to prevent potential RX overload and maintain long-term laser stability.

Is the LS-SM552G-40C compatible with third-party switch brands like Cisco, Juniper, Mikrotik, or Alcatel-Lucent, and does it support real-time DOM / DDM telemetry via CLI?

Absolutely. The LS-SM552G-40C is fully compliant with the SFP Multi-Source Agreement (MSA) and SFF-8472 diagnostic standards. We offer custom EEPROM coding for seamless compatibility with major OEM brands including Cisco, Juniper, Mikrotik, Alcatel-Lucent, and generic switches. Digital Optical Monitoring (DOM / DDM) is fully functional, allowing your switch CLI or NMS system to read real-time TX/RX power, laser bias current, module voltage, and operating temperature.

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Generic SFP-2GLR-55 Compatible LINK-PP SFP 2.5G Fibre Channel 1550nm 40km DOM Duplex LC SMF Optical Transceiver Module

Name: Generic SFP-2GLR-55 Compatible LINK-PP SFP 2.5G Fibre Channel 1550nm 40km DOM Duplex LC SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 223808
Price: 16.856 USD
Availability: InStock
Rating: 4.9 (18 reviews)

# 223808

Product: Generic SFP-2GLR-55 Compatible LINK-PP SFP 2.5G Fibre Channel 1550nm 40km DOM Duplex LC SMF Optical Transceiver Module
SKU: 223808
P/N: LS-SM552G-40C
Price: $ 19.6
Stock: 960 in Stock
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Product URL: https://www.l-p.com/products/479047.htm

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Manufacture: LINK-PP

P/N: LS-SM552G-40C

Compatible:: LINK-PP; Alcatel-Lucent; Generic

Compatible P/N:: SFP-2GLR-55 | 40km; SFP-2GL2-55 | 80km

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Generic SFP-2GLR-55 Compatible LINK-PP 2.5G SFP Specifications

The Generic SFP-2GLR-55 Compatible LINK-PP SFP transceiver delivers stable and high-performance connectivity with data rates of up to 2.5Gbps over single-mode fiber (SMF) distances reaching 40km. Operating at a 1550nm wavelength, it is designed for long-distance transmission with minimal signal loss.

Generic Part Number	SFP-2GLR-55	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	2.5Gbps
Wavelength	1550nm	Max Cable Distance	40km
Connector	LC duplex	Media	SMF
Transmitter Type	DFB	Receiver Type	PIN
TX Power	-2 to +3dBm	RX Power	-20 to -1dBm
Receiver Sensitivity	<-20dBm	Receiver Overload	-1dBm
Operating Temperature Range	0 to 70°C	Protocols	MSA Compliant

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Q: What is the recommended operating temperature range for this 1550nm 2.5Gbps SFP module when deployed in outdoor cabinets or unconditioned equipment rooms? By N***s on 2026-05-07

A: The standard LS-SM552G-40C model features a commercial operating case temperature range of 0°C to 70°C (32°F to 158°F), which is suitable for standard indoor server rooms and thermally managed outdoor enclosures. If your deployment requires harsh environment reliability—such as unheated pole cabinets or roadside base stations—we also offer the industrial grade version (part number LS-SM552G-40I) which supports an extended operating temperature range from -40°C to 85°C. By admin on 2026-05-08
Q: Can we use this LINK-PP LS-SM552G-40C 2.5G SFP transceiver on short-distance single mode fiber runs, like 2km or 5km campus links, without saturating or damaging the optical receiver? By A***r on 2025-05-04

A: Yes, you can use the LS-SM552G-40C module on shorter SMF link distances, but you should verify your optical light levels. The receiver overload threshold for this module is -1dBm and receiver sensitivity is -20dBm, while the DFB laser transmitter power ranges from -2 to +3dBm. If your fiber span is under 10km, we recommend checking DOM/DDM real-time optical power or adding a 5dB to 10dB LC optical attenuator to prevent potential RX overload and maintain long-term laser stability. By admin on 2025-05-04
Q: Is the LS-SM552G-40C compatible with third-party switch brands like Cisco, Juniper, Mikrotik, or Alcatel-Lucent, and does it support real-time DOM / DDM telemetry via CLI? By C***g on 2024-06-30

A: Absolutely. The LS-SM552G-40C is fully compliant with the SFP Multi-Source Agreement (MSA) and SFF-8472 diagnostic standards. We offer custom EEPROM coding for seamless compatibility with major OEM brands including Cisco, Juniper, Mikrotik, Alcatel-Lucent, and generic switches. Digital Optical Monitoring (DOM / DDM) is fully functional, allowing your switch CLI or NMS system to read real-time TX/RX power, laser bias current, module voltage, and operating temperature. By admin on 2024-07-01

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S***g

India

Verified Purchase

4 .0

2026-05-21

Modules perform great for 2.5G SFP transceivers, but shipping box was slightly dented upon arrival. Luckily the anti-static protective bubble packaging kept the optics undamaged.

55 Helpful vote Comments

S***z

Republic of Korea

Verified Purchase

5 .0

2026-03-27

Plug and play.

11 Helpful vote Comments

C***s

Sweden

Verified Purchase

5 .0

2026-03-07

Outstanding compatibility on Alcatel-Lucent and generic OEM switches. We needed 2.5G Fibre Channel optics supporting 1550nm over 40km SMF for SAN replication. LINK-PP LS-SM552G-40C locked sync in seconds and telemetry matches factory datasheet specs perfectly =D

86 Helpful vote Comments

S***s

Hungary

Verified Purchase

5 .0

2025-11-12

Replaced costly OEM modules with this LS-SM552G-40C on our 2.5G Fibre Channel storage network. Syncs up instantly without any link flaps or error frames.

18 Helpful vote Comments

J***t

Austria

Verified Purchase

5 .0

2025-10-16

Solid 2.5G SFP module. Flawless 40km link over SMF :)

81 Helpful vote Comments

S***s

Taiwan, Province of China

Verified Purchase

5 .0

2025-05-12

Strict MSA compliance makes this 2.5G SFP module a lifesaver for multi-vendor network environments. We tested duplex LC single mode fiber connections up to 38km distance. Optical receiver sensitivity held steady at -18dBm without line attenuation issues.

20 Helpful vote Comments

H***k

Singapore

Verified Purchase

5 .0

2025-04-02

Used these for CPRI cellular backhaul testing in an outdoor cabinet enclosure. Operating case temperature handled daytime ambient heat without optical power drift. Full DDM readings for tx rx power and operating temperature were exposed properly via switch CLI. Great alternative to overpriced OEM modules ;)

63 Helpful vote Comments

T***e

Malaysia

Verified Purchase

5 .0

2025-01-22

Great 1550nm transceivers for campus fiber backhaul.

13 Helpful vote Comments

M***l

Romania

Verified Purchase

5 .0

2024-12-19

Tested on Cisco and Juniper switches for a long haul LC duplex link. DOM reading shows stable optical rx power near -12dBm across 32km. Excellent value :-D

15 Helpful vote Comments

C***r

United Kingdom

Verified Purchase

5 .0

2024-11-23

Works great for outdoor cabinet fiber extension. Case temperature handles ambient outdoor variation well with stable TX laser output power and zero packet drop.

85 Helpful vote Comments

J***s

Sweden

Verified Purchase

5 .0

2024-11-17

Good thermal performance inside our indoor server cabinet. Operating temperature stays around 38℃ even under heavy 2.5G network throughput stress tests =)

90 Helpful vote Comments

J***s

Nepal

Verified Purchase

4 .0

2024-11-17

Optical specs are accurate and DOM diagnostic values match our optical power meter readings. Only downside was delivery took 2 extra days to arrive at our IT facility in Germany.

17 Helpful vote Comments

M***l

Ukraine

Verified Purchase

5 .0

2024-10-17

Installed these 1550nm 40km LC duplex modules in our campus backbone core switches. Signal attenuation across 30km single mode fiber was under budget, and DDM diagnostics show stable operating temperatures between 32℃ and 41℃ under peak traffic. Perfect fit for budget-conscious enterprise deployments.

82 Helpful vote Comments

C***k

France

Verified Purchase

5 .0

2024-09-07

We bought a batch of LS-SM552G-40C SFP transceivers for a 35km single mode fiber interconnect between two regional data centers. Insertion loss was minimal and receiver sensitivity was well within the -20dBm spec. Digital optical monitoring features integrate perfectly with our Zabbix monitoring setup. Highly recommended for enterprise network engineers.

57 Helpful vote Comments

N***r

Italy

Verified Purchase

5 .0

2024-08-11

Full 2.5Gbps speed achieved ;)

69 Helpful vote Comments

E***n

United Kingdom

Verified Purchase

5 .0

2024-04-23

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

21 Helpful vote Comments

N***n

India

Verified Purchase

5 .0

2024-03-12

Super fast dispatch and solid duplex LC connector fit. The DFB 1550nm laser delivers strong optical signal over our 40km single mode fiber cable runs.

84 Helpful vote Comments

O***s

Hong Kong

Verified Purchase

5 .0

2024-03-02

Deployed six LS-SM552G-40C transceivers for enterprise building interconnects spanning 28km. Optical link budget was well within spec and light levels are stable at -6dBm.

37 Helpful vote Comments