What is the operating temperature range of this SFP module?

It operates at an industrial-grade temperature range from -40°C to +85°C.

What is the maximum transmission distance supported by this module?

It supports long-haul single-mode fiber transmission up to 80 kilometers.

What wavelength and transmitter type does the SFP1G-ZX-55-I use?

It features a 1550nm center wavelength with a DFB laser transmitter.

Does this transceiver module support real-time digital optical monitoring?

Yes, it includes built-in DOM compliant with SFF-8472 standards.

Hey, we run a mix of Juniper and Arista switches in our core network. Will this 1.25G SFP module work natively without throwing unapproved transceiver errors?

Absolutely! This module is strictly SFF-8472 MSA compliant and fully compatible with major OEM brands like Juniper, Arista, Cisco, and Mikrotik. It’s true plug-and-play, so your equipment will recognize it instantly without any "unsupported transceiver" warnings.

We need to install these in outdoor telecom cabinets where winters get brutal. Does this module actually hold up to sub-zero temperatures?

Yes, this is a genuine industrial-grade optical transceiver. It is purpose-built to operate reliably in harsh outdoor and non-climate-controlled environments, supporting an extreme temperature range from -40°C to +85°C (-40°F to 185°F) with zero signal degradation.

Just to confirm before ordering, what kind of fiber patch cables do I need to connect this 80km link?

You will need Single-Mode Fiber (SMF) patch cables terminated with Duplex LC connectors. Since the module transmits at a 1550nm center wavelength, standard 9/125µm SMF is perfectly optimized for your 80km long-haul transmission.

Does this transceiver support real-time monitoring? Our network engineers need to track optical power and temp remotely.

Yes, it features built-in Digital Optical Monitoring (DOM / DDM) fully compliant with IEEE 802.3ah and SFF-8472 protocols. Your datacenter operations team can seamlessly monitor real-time metrics like Tx/Rx power, internal temperature, and laser bias right through your switch's management interface.

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H3C SFP1G-ZX-55-I Compatible LINK-PP 1.25G SFP 1550nm 80km Duplex LC DOM SMF Optical Transceiver Module (Industrial)

Name: H3C SFP1G-ZX-55-I Compatible LINK-PP 1.25G SFP 1550nm 80km Duplex LC DOM SMF Optical Transceiver Module (Industrial)
Brand: LINK-PP
SKU: 212696
Price: 13.588 USD
Availability: InStock
Rating: 5 (25 reviews)

# 212696

Product: H3C SFP1G-ZX-55-I Compatible LINK-PP 1.25G SFP 1550nm 80km Duplex LC DOM SMF Optical Transceiver Module (Industrial)
SKU: 212696
P/N: LS-SM551G-80I
Price: $ 15.8
Stock: 3125 in Stock
Sold: 1.6K
Product URL: https://www.l-p.com/products/493648.htm

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

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

For Order Over $5000 Get $100.00 Off , Code: Linkpp100

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Manufacture: LINK-PP

P/N: LS-SM551G-80I

Compatible:: Cisco; LINK-PP; Adtran; Alcatel-Lucent; Arista; Avaya; Brocade; Calix; Ciena; Dell; Extreme; FS; Fortinet; Generic; H3C; IBM; Intel; Juniper; Mikrotik; NVIDIA/Mellanox; Netgear

Compatible P/N:: SFP1G-SX-31 | 2km; SFP1G-SX-31-I | 2km; SFP-GE-LX-SM1310 | 10km; SFP1G-LX-31-I | 10km; SFP-GE-LX-SM1310-20 | 20km; JD062A | 40km; SFP-GE-LH40-SM1310 | 40km; SFP-GE-LH40-SM1550 | 40km; SFP1G-EX-31-I | 40km; JD063B | 80km; SFP-GE-LH70-SM1550 | 80km; SFP1G-ZX-55-I | 80km; JD103A | 100km; SFP-GE-LH100-SM1550 | 100km; SFP1G-ZX120-55 | 120km; SFP1G-ZX160-55 | 160km

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H3C SFP1G-ZX-55-I Compatible LINK-PP 1.25G SFP Specifications

The H3C SFP1G-ZX-55-I Compatible LINK-PP module is a high-performance industrial SFP transceiver module designed for 1.25Gbps Gigabit Ethernet and Fiber Channel long-haul backbone networks. Operating at a 1550nm wavelength over single-mode fiber, it features a duplex LC interface, supports up to 80km transmission, and includes integrated digital diagnostic monitoring for optimized network management.

H3C Part Number	SFP1G-ZX-55-I	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	1.25Gbps
Wavelength	1550nm	Max Cable Distance	80km
Connector	Duplex LC	Media	SMF
Transmitter Type	DFB	Receiver Type	PIN
TX Power	0 to +5dBm	RX Power	-26 to -1dBm
Receiver Sensitivity	-26dBm	DOM Support	Yes
Operating Temperature Range	-40 to 85°C	Protocols	SFF-8472 MSA Compliant, IEEE 802.3ah-2004

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Q: Hey, we run a mix of Juniper and Arista switches in our core network. Will this 1.25G SFP module work natively without throwing unapproved transceiver errors? By N***g on 2026-04-09

A: Absolutely! This module is strictly SFF-8472 MSA compliant and fully compatible with major OEM brands like Juniper, Arista, Cisco, and Mikrotik. It’s true plug-and-play, so your equipment will recognize it instantly without any "unsupported transceiver" warnings. By admin on 2026-04-09
Q: We need to install these in outdoor telecom cabinets where winters get brutal. Does this module actually hold up to sub-zero temperatures? By D***l on 2026-03-08

A: Yes, this is a genuine industrial-grade optical transceiver. It is purpose-built to operate reliably in harsh outdoor and non-climate-controlled environments, supporting an extreme temperature range from -40°C to +85°C (-40°F to 185°F) with zero signal degradation. By admin on 2026-03-08
Q: Just to confirm before ordering, what kind of fiber patch cables do I need to connect this 80km link? By A***r on 2025-10-19

A: You will need Single-Mode Fiber (SMF) patch cables terminated with Duplex LC connectors. Since the module transmits at a 1550nm center wavelength, standard 9/125µm SMF is perfectly optimized for your 80km long-haul transmission. By admin on 2025-10-19
Q: Does this transceiver support real-time monitoring? Our network engineers need to track optical power and temp remotely. By S***s on 2025-07-20

A: Yes, it features built-in Digital Optical Monitoring (DOM / DDM) fully compliant with IEEE 802.3ah and SFF-8472 protocols. Your datacenter operations team can seamlessly monitor real-time metrics like Tx/Rx power, internal temperature, and laser bias right through your switch's management interface. By admin on 2025-07-20

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J***s

United Kingdom

Verified Purchase

5 .0

2026-05-26

No issues batch deploying these MSA compliant 1.25G SFPs in our main datacenter.

172 Helpful vote Comments

L***n

United Kingdom

Verified Purchase

5 .0

2026-05-01

Works natively with Dell and Extreme switches. Good price for a long-haul backbone solution.

81 Helpful vote Comments

J***n

Canada

Verified Purchase

5 .0

2026-02-11

Perfect SMF transceiver for remote site connectivity.

189 Helpful vote Comments

D***n

Portugal

Verified Purchase

5 .0

2025-12-13

Using these to connect remote monitoring systems over SMF. The dispersion tolerance of the DFB laser at 80km is legit. Flawless 1.25Gbps performance even in our non-climate-controlled warehouse edge switches.

51 Helpful vote Comments

M***n

United States

Verified Purchase

5 .0

2025-09-10

Upgraded our regional backbone architecture with this single-mode module. Tx/Rx power levels are perfectly within IEEE 802.3ah specs. Great DOM support for real-time monitoring in our enterprise automation control systems.

114 Helpful vote Comments

T***s

Chile

Verified Purchase

5 .0

2025-09-01

Fast shipping and excellent SFF-8472 support. Network engineers will love the real-time diagnostics. ⚙️

84 Helpful vote Comments

S***n

Portugal

Verified Purchase

5 .0

2025-08-30

Reliable 1.25Gbps speeds for our campus network.

184 Helpful vote Comments

R***t

Sweden

Verified Purchase

5 .0

2025-03-01

True plug and play with Cisco gear.

260 Helpful vote Comments

D***h

Italy

Verified Purchase

4 .0

2025-01-25

Solid industrial SFP module for 80km link, but the shipping box was slightly crushed.

161 Helpful vote Comments

M***l

United States

Verified Purchase

5 .0

2025-01-19

DOM features work perfectly as described.

222 Helpful vote Comments

D***l

Denmark

Verified Purchase

5 .0

2024-12-23

1550nm wavelength stays stable under heavy loads.

103 Helpful vote Comments

W***s

Ukraine

Verified Purchase

5 .0

2024-11-22

High-quality duplex LC connectors, very durable.

244 Helpful vote Comments

M***n

Macao

Verified Purchase

5 .0

2024-10-27

Flawless OEM compatibility! Recognized instantly on our Mikrotik routers with full DOM stats.

192 Helpful vote Comments

T***a

Austria

Verified Purchase

5 .0

2024-04-09

I'm really happy with all aspects of my 10/25/40G Transceiver Modules purchase. I'll definitely use l-p.com for future purchases. Thanks so much!

11 Helpful vote Comments

K***n

United States

Verified Purchase

5 .0

2024-04-06

Great job gentleman, quick shipment, thanks again.

11 Helpful vote Comments

K***y

Poland

Verified Purchase

5 .0

2024-03-25

The price is very attractive. The customer service is very nice.

55 Helpful vote Comments

B***e

France

Verified Purchase

5 .0

2023-12-22

Just what I ordered, good job!

71 Helpful vote Comments

E***g

Singapore

Verified Purchase

5 .0

2023-12-19

Packaged very well. Arrived on time. No issues. Great purchase. Completely satisfied.

65 Helpful vote Comments

R***t

New Zealand

Verified Purchase

5 .0

2023-10-31

I can honestly say it's one of the best and most beneficial products I have bought !! brilliant product, delivered earlier than originally stated and work excellent

84 Helpful vote Comments

M***a

Libyan Arab Jamahiriya

Verified Purchase

5 .0

2023-10-28

Great company with high quality. I would gladly purchase from l-p.com again for the right 10/25/40G Transceiver Modules.

121 Helpful vote Comments

C***s

Bulgaria

Verified Purchase

5 .0