What is the maximum data rate supported by this SFP module?

This module supports high-performance data rates up to 1.25Gbps for gigabit networks.

What type of fiber cable should be used with the SFP1G-SX-31-I?

It is designed exclusively for single-mode fiber (SMF) networks via duplex LC connectors.

How far can this optical transceiver transmit data safely?

It reliably transmits high-speed optical signals up to a maximum distance of 2km.

What is the operating temperature range for this industrial module?

This rugged industrial-grade module operates perfectly from -40°C up to +85°C.

Hey guys, will this 1.25G SFP module work seamlessly with my existing Cisco Catalyst switches and Netgear routers?

Yes! The LS-SM311G-02I is extensively tested for OEM compatibility. It functions flawlessly with major networking equipment brands out of the box, including Cisco, Netgear, Juniper, and Arista.

I need to bridge a 1.5km gap using single-mode fiber. Does this LC module fit the bill, or do I need multi-mode?

You found the right module! This transceiver uses a 1310nm FP laser transmitter optimized specifically for Single-Mode Fiber (SMF). Its Duplex LC interface guarantees secure connections for distances up to 2km.

Our outdoor IP camera enclosures face brutal summer heat. Can this industrial version survive those harsh temperature spikes?

Without a doubt. This industrial-grade SFP transceiver is heavily ruggedized, ensuring ultra-stable 1.25Gbps data transmission in extreme operating temperatures from a freezing -40°C all the way up to +85°C.

Does this optical module support real-time health tracking? We require strict SFF-8472 protocol compliance for our network management software.

Yes, it is fully SFF-8472 MSA compliant and features advanced DOM (Digital Optical Monitoring) and DDM support. Network admins can easily track real-time diagnostics like transceiver temperature, voltage, and optical TX/RX power remotely.

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Ciena SFP1G-SX-31-I Compatible LINK-PP 1.25G SFP 1310nm 2km Duplex LC DOM SMF Optical Transceiver Module (Industrial)

Name: Ciena SFP1G-SX-31-I Compatible LINK-PP 1.25G SFP 1310nm 2km Duplex LC DOM SMF Optical Transceiver Module (Industrial)
Brand: LINK-PP
SKU: 212608
Price: 5.59 USD
Availability: InStock
Rating: 5 (38 reviews)

# 212608

Product: Ciena SFP1G-SX-31-I Compatible LINK-PP 1.25G SFP 1310nm 2km Duplex LC DOM SMF Optical Transceiver Module (Industrial)
SKU: 212608
P/N: LS-SM311G-02I
Price: $ 6.5
Stock: 497 in Stock
Sold: 186
Product URL: https://www.l-p.com/products/494891.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-SM311G-02I

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

Compatible P/N:: SFP1G-SX-31 | 2km; SFP1G-SX-31-I | 2km; OPT-LX | 10km; XCVR-010Y31 | 10km; XCVR-A10Y31 | 10km; SFP1G-ELX-31 | 20km; SFP1G-EX-55 | 40km; XCVR-040M31 | 40km; XCVR-040Y31 | 40km; SFP1G-ZX-55 | 80km; SFP1G-ZX-55-I | 80km; SFP1G-ZX100-55 | 100km; SFP1G-ZX120-55 | 120km; SFP1G-ZX160-55 | 160km

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Ciena SFP1G-SX-31-I Compatible LINK-PP 1.25G SFP Specifications

The Ciena SFP1G-SX-31-I Compatible LINK-PP module is a high-performance 1.25Gbps SFP transceiver engineered for single-mode fiber infrastructure. It features a 1310nm FP laser transmitter paired with a highly sensitive PIN photodiode receiver. Operating on a stable +3.3V power supply, this hot-pluggable module fully complies with standard SFP MSA and SFF-8472 specifications. It delivers efficient gigabit data transmission.

Ciena Part Number	SFP1G-SX-31-I	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	1.25Gbps
Wavelength	1310nm	Max Cable Distance	2km
Connector	Duplex LC	Media	SMF
Transmitter Type	FP	Receiver Type	PIN
TX Power	-12 to -3dBm	RX Power	-23 to -1dBm
Receiver Sensitivity	<-23dBm	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 guys, will this 1.25G SFP module work seamlessly with my existing Cisco Catalyst switches and Netgear routers? By P***z on 2026-03-24

A: Yes! The LS-SM311G-02I is extensively tested for OEM compatibility. It functions flawlessly with major networking equipment brands out of the box, including Cisco, Netgear, Juniper, and Arista. By admin on 2026-03-24
Q: I need to bridge a 1.5km gap using single-mode fiber. Does this LC module fit the bill, or do I need multi-mode? By J***r on 2025-12-04

A: You found the right module! This transceiver uses a 1310nm FP laser transmitter optimized specifically for Single-Mode Fiber (SMF). Its Duplex LC interface guarantees secure connections for distances up to 2km. By admin on 2025-12-04
Q: Our outdoor IP camera enclosures face brutal summer heat. Can this industrial version survive those harsh temperature spikes? By K***n on 2025-11-29

A: Without a doubt. This industrial-grade SFP transceiver is heavily ruggedized, ensuring ultra-stable 1.25Gbps data transmission in extreme operating temperatures from a freezing -40°C all the way up to +85°C. By admin on 2025-11-30
Q: Does this optical module support real-time health tracking? We require strict SFF-8472 protocol compliance for our network management software. By W***z on 2025-09-12

A: Yes, it is fully SFF-8472 MSA compliant and features advanced DOM (Digital Optical Monitoring) and DDM support. Network admins can easily track real-time diagnostics like transceiver temperature, voltage, and optical TX/RX power remotely. By admin on 2025-09-12

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J***l

Taiwan, Province of China

Verified Purchase

5 .0

2026-05-19

Integrated perfectly with our Arista switches. 1.25Gbps link negotiated instantly on single-mode fiber runs.

194 Helpful vote Comments

K***t

Norway

Verified Purchase

5 .0

2026-05-06

Flawless Cisco compatibility out of the box!

233 Helpful vote Comments

C***s

Canada

Verified Purchase

5 .0

2026-04-19

The DDM stats read perfectly on my Fortinet firewall. Awesome industrial SFP module!

238 Helpful vote Comments

M***n

Peru

Verified Purchase

5 .0

2025-12-19

Reliable optical transceiver module for extreme heat environments. No connection drops so far.

83 Helpful vote Comments

M***s

Ukraine

Verified Purchase

5 .0

2025-12-13

PIN receiver sensitivity is on point. Fixed our long-reach link issues immediately!

257 Helpful vote Comments

S***z

Peru

Verified Purchase

5 .0

2025-12-12

Handles 85°C operating temp like a champ.

82 Helpful vote Comments

J***t

Singapore

Verified Purchase

5 .0

2025-08-04

Hard to tell on your site what the quantity of an item is in your shopping cart. Had to add the item twice.

31 Helpful vote Comments

C***n

United States

Verified Purchase

5 .0

2025-07-14

Lots of products but hard to find the exact one I need.

36 Helpful vote Comments

B***r

Canada

Verified Purchase

5 .0

2025-06-01

Good prices and value

37 Helpful vote Comments

D***z

Malaysia

Verified Purchase

5 .0

2025-05-21

DOM readings are highly accurate. Good stuff!

129 Helpful vote Comments

J***s

Hungary

Verified Purchase

5 .0

2025-05-17

Excellent quality, could't ask for better, unbelievable

102 Helpful vote Comments

K***y

United States

Verified Purchase

5 .0

2025-05-09

great service at a good price.

48 Helpful vote Comments

P***g

Nepal

Verified Purchase

5 .0

2025-04-23

The 10/25/40G Transceiver Modules I received more than met my expectations.

53 Helpful vote Comments

S***z

Austria

Verified Purchase

5 .0

2025-04-07

Great price for an industrial-grade gigabit transceiver. Works flawlessly in our outdoor enclosures. ☔

148 Helpful vote Comments

G***p

Brazil

Verified Purchase

5 .0

2025-04-02

placed my order, made my payment, but it was was shipped slowly.

59 Helpful vote Comments

L***r

Morocco

Verified Purchase

5 .0

2025-03-25

I had a good experience with Link-PP. Hope to do more business in the future.

65 Helpful vote Comments

D***s

Ethiopia

Verified Purchase

5 .0

2025-02-23

Working perfectly in our outdoor IP cameras.

214 Helpful vote Comments

M***n

Israel

Verified Purchase

5 .0

2025-02-19

Great ricing, awesome customer service!!

48 Helpful vote Comments

T***r

Turkey

Verified Purchase

5 .0

2025-01-12

Great price, great product!

85 Helpful vote Comments

C***z

Turkey

Verified Purchase

5 .0

2024-12-30

Everything I've bought has been great and the website is easy to use.

72 Helpful vote Comments

S***n

Argentina

Verified Purchase

5 .0

2024-12-09

Fast shipping to California. Excellent 1.25G SFP!

60 Helpful vote Comments

I***n

Brunei Darussalam

Verified Purchase

5 .0

2024-12-08

Shipping speed and quality from LINK-PP is always phenomenal.

91 Helpful vote Comments

N***r

Thailand

Verified Purchase

5 .0

2024-10-18

Perfect 2km transmission for our multi-building fiber network. Arrived fast in Texas!

88 Helpful vote Comments

T***g

Finland

Verified Purchase

5 .0

2024-09-13

Very satisfied, Very Fast on delivery and I'm sure I will need to order again soon.

32 Helpful vote Comments

i***d

Norway

Verified Purchase

5 .0

2024-08-18

Very knowledgeable, quick responses, very good prices and great customer service

89 Helpful vote Comments

R***e

Russian Federation

Verified Purchase

5 .0

2024-08-04

Very Very good service. Ordered product and received before the date that was given.

60 Helpful vote Comments

H***n

Taiwan, Province of China

Verified Purchase

5 .0

2024-07-12

Customer service is friendly and helpful. Price is charming. Quality is as expected.

28 Helpful vote Comments

J***x

United Arab Emirates

Verified Purchase

5 .0

2024-06-20

Poor customer services

49 Helpful vote Comments

A***v

India

Verified Purchase

5 .0

2024-06-06

The experience this time is very good. Their responses are always quick and useful. The services are much appreciated. These make us feel at ease. We have nothing to complain about these modules. They are well packaged, easy to deploy. They make no packet loss. High performances for us.

105 Helpful vote Comments

M***n

Singapore

Verified Purchase

5 .0

2024-05-14

Product came as ordered. No problems. Very satisfied.

89 Helpful vote Comments

J***s

United States

Verified Purchase

5 .0