Does extreme heat accelerate signal degradation or optical power loss?

No, the internal 1310nm FP laser is thermally stabilized to maintain steady transmission metrics across its entire operational envelope.

Will a polarity mismatch on the duplex LC cable cause uneven optical power readouts?

A cabling polarity error will result in a total loss of signal (LOS) across channels rather than uneven power distribution.

Is this module compatible with legacy Fast Ethernet switches?

Yes, the LS-MM3101-02I 155M SFP complies with the standard SFP Multi-Source Agreement (MSA) and will work smoothly in switch ports supporting 100BASE-FX optics.

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Arista Networks SFP-100FX-31-I Compatible LINK-PP 155M SFP 1310nm 2km Duplex LC DOM MMF Optical Transceiver Module(Industrial)

Name: Arista Networks SFP-100FX-31-I Compatible LINK-PP 155M SFP 1310nm 2km Duplex LC DOM MMF Optical Transceiver Module(Industrial)
Brand: LINK-PP
SKU: 212904
Price: 5.762 USD
Availability: InStock
Rating: 4.9 (10 reviews)

# 212904

Product: Arista Networks SFP-100FX-31-I Compatible LINK-PP 155M SFP 1310nm 2km Duplex LC DOM MMF Optical Transceiver Module(Industrial)
SKU: 212904
P/N: LS-MM3101-02I
Price: $ 6.7
Stock: 312 in Stock
Sold: 791
Product URL: https://www.l-p.com/products/493833.htm

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

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

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Manufacture: LINK-PP

P/N: LS-MM3101-02I

Compatible:: Cisco; LINK-PP; Allied Telesis; Arista Networks; D-Link; Dell; Extreme; FS; Foundry Networks; H3C; Moxa; NETGEAR

Compatible P/N:: SFP-100FX-31 | 2km; SFP-100FX-31-I | 2km

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Arista Networks SFP-100FX-31-I Compatible LINK-PP 155M SFP Specifications

SFP-100FX-31-I functions as an industrial-grade 155M SFP multi-mode optical transceiver, pairing a 1310nm FP laser with a PIN photodetector to secure a 2km transmission span throughout a ruggedized -40°C to +85°C operating envelope.

Arista Networks Part Number	SFP-100FX-31-I	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	155Mbps
Wavelength	1310nm	Max Cable Distance	2km
Connector	Duplex LC	Media	MMF
Transmitter Type	FP	Receiver Type	PIN
TX Power	-18 to -10dBm	RX Power	-30 to -6dBm
Receiver Sensitivity	-26dBm	DOM Support	Yes
Operating Temperature Range	-40 to 85°C	Protocols	IEEE 802.3z, SFF-8472, FC-PI, SFP MSA (INF-8074i) Compliant

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Q: Does extreme heat accelerate signal degradation or optical power loss? By S***y on 2025-10-11

A: No, the internal 1310nm FP laser is thermally stabilized to maintain steady transmission metrics across its entire operational envelope. By admin on 2025-10-12
Q: Will a polarity mismatch on the duplex LC cable cause uneven optical power readouts? By T***t on 2025-06-03

A: A cabling polarity error will result in a total loss of signal (LOS) across channels rather than uneven power distribution. By admin on 2025-06-04
Q: Is this module compatible with legacy Fast Ethernet switches? By R***d on 2025-04-16

A: Yes, the LS-MM3101-02I 155M SFP complies with the standard SFP Multi-Source Agreement (MSA) and will work smoothly in switch ports supporting 100BASE-FX optics. By admin on 2025-04-17

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K***t

Turkey

Verified Purchase

5 .0

2026-04-21

Excellent build quality on the duplex LC receptacle. The patch cables click in securely and don't wiggle, which is critical for the high-vibration environment near our server room exhaust fans.

67 Helpful vote Comments

J***s

Hungary

Verified Purchase

5 .0

2026-04-14

Kept our legacy industrial control networks humming along perfectly.

64 Helpful vote Comments

S***g

Portugal

Verified Purchase

5 .0

2026-03-02

The SFF-8472 digital diagnostics are highly accurate on our switches. Being able to pull real-time optical RX/TX power levels directly from our monitoring software makes proactive maintenance a breeze.

68 Helpful vote Comments

P***z

Czech Republic

Verified Purchase

4 .0

2026-02-26

Arrived fast. These 155M SFP modules conform to the SFP Multi-Source Agreement, so setup was intuitive, but I prefer a printed spec sheet in the box.

21 Helpful vote Comments

A***s

Poland

Verified Purchase

5 .0

2026-01-31

For our utility grid modernization project, we needed a 155 Mbps SFP optical transceiver module that could withstand extreme thermal variations and integrate seamlessly into our existing multi-vendor switch fabric. This module passed our substation compliance audits with ease. The DOM telemetry integration lets our central monitoring station track operational metrics remotely, drastically reducing manual field maintenance visits.

145 Helpful vote Comments

J***s

Greece

Verified Purchase

5 .0

2026-01-07

2km link length reached easily without any frame drops or errors. Clear signal.

87 Helpful vote Comments

V***s

United Kingdom

Verified Purchase

5 .0

2025-12-03

Replaced some failing third-party optics with these LINK-PP units on our 2km multi-mode run. The signal integrity is night and day—zero CRC errors or dropped packets after a week of stress testing.

148 Helpful vote Comments

D***r

France

Verified Purchase

5 .0

2025-10-18

Needed to link some older manufacturing floor PLCs to our core network over existing multimode fiber. These 155Mbps SFP optical transceivers synced up instantly with no configuration headaches. Very smooth rollout.

59 Helpful vote Comments

P***s

Japan

Verified Purchase

5 .0

2025-09-06

We deployed these inside our unconditioned street cabinets for traffic monitoring. The -40°C to +85°C operating range works as advertised and handled the summer heatwave with no port flapping. Will buy more for phase two.

71 Helpful vote Comments

F***y

Australia

Verified Purchase

5 .0

2025-06-10

Operating smoothly inside our uncooled trackside cabinets. The -40°C to +85°C rating gives us real peace of mind during winter. ❄️

153 Helpful vote Comments