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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H3C SFP-100FX-31-I Compatible LINK-PP 155M SFP 1310nm 2km Duplex LC DOM MMF Optical Transceiver Module(Industrial)

Name: H3C SFP-100FX-31-I Compatible LINK-PP 155M SFP 1310nm 2km Duplex LC DOM MMF Optical Transceiver Module(Industrial)
Brand: LINK-PP
SKU: 212910
Price: 5.762 USD
Availability: InStock
Rating: 4.8 (13 reviews)

# 212910

Product: H3C SFP-100FX-31-I Compatible LINK-PP 155M SFP 1310nm 2km Duplex LC DOM MMF Optical Transceiver Module(Industrial)
SKU: 212910
P/N: LS-MM3101-02I
Price: $ 6.7
Stock: 322 in Stock
Sold: 658
Product URL: https://www.l-p.com/products/493836.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-I | 2km; SFP-FE-SX-MM1310-A | 2km

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H3C 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.

H3C 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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P***l

United States

Verified Purchase

5 .0

2026-04-28

The optical modules work flawlessly for our Fast Ethernet setup, but international transit took longer than expected to clear customs. Packaged very safely in anti-static shielding though.

44 Helpful vote Comments

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

G***s

Israel

Verified Purchase

4 .0

2026-03-25

The outer shipping box arrived crushed, but thankfully the internal packaging kept the transceivers safe. Modules boot up fine.

33 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

H***n

United Arab Emirates

Verified Purchase

5 .0

2026-02-08

Needed a rugged 155M SFP for an outdoor traffic controller hub. Dropped the LS-MM3101-02I module in and it instantly linked up at 155Mbps. Zero packet loss.

48 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

A***n

India

Verified Purchase

5 .0

2025-11-14

Clean signals over our 1.5km multi-mode fiber span between campus buildings.

116 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

R***s

Canada

Verified Purchase

5 .0

2025-07-27

We use these for outdoor IP camera backhaul stations along the highway network. The extended temperature operating envelope ensures the links don't drop during peak summer heat waves.

55 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