Will the DOM laser bias current readings stay accurate if my network closet gets up to 45°C?

Yes, the built-in DOM microchip is calibrated to report accurate real-time telemetry across its entire 0°C to 70°C operating window.

Do these 155M SFP modules support hot-swapping, or do I need to reboot my edge router to get the system to recognize the module?

They are fully hot-pluggable. You can swap them live without interrupting the rest of your rack's traffic.

Can I use a standard single-mode Duplex LC patch cord with this transceiver if the run is very short?

No, this is an MMF (multimode) transceiver utilizing a 1310nm FP laser designed specifically for multi-mode fiber cores.

We accidentally ordered a single-mode patch cord. Can we use a mode-conditioning cable to make this 155M multi-mode SFP module work over it?

Mode-conditioning cables are meant for the opposite scenario (SMF optics over MMF). For this module, you must use a dedicated duplex LC multi-mode fiber patch cord.

Does this transceiver support old-school OC-3 ATM telecom links, or is it strictly for Fast Ethernet?

It supports both! The 155Mbps physical layer rate is perfectly timed for both Fast Ethernet (100BASE-FX) and SONET legacy equipment.

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

Name: Arista Networks SFP-100FX-31 Compatible LINK-PP 155M SFP 1310nm 2km Duplex LC DOM MMF Optical Transceiver Module
Brand: LINK-PP
SKU: 212913
Price: 4.902 USD
Availability: InStock
Rating: 4.9 (9 reviews)

# 212913

Product: Arista Networks SFP-100FX-31 Compatible LINK-PP 155M SFP 1310nm 2km Duplex LC DOM MMF Optical Transceiver Module
SKU: 212913
P/N: LS-MM3101-02C
Price: $ 5.7
Stock: 661 in Stock
Sold: 1.9K
Product URL: https://www.l-p.com/products/493850.htm

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Manufacture: LINK-PP

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Compatible:: Cisco; LINK-PP; 3Com; Arista Networks; Avaya; Brocade; Dell; Extreme Networks; FS; H3C; HPE; HPE H3C; HPE ProCurve; Hirschmann

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

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

SFP-100FX-31 redefines entry-level fiber connectivity as a 155M SFP multi-mode optical transceiver, engineered with a precision 1310nm FP laser and PIN photo detector to drive seamless data transmission up to a 2km span across multi-mode fiber within standard 0°C to 70°C commercial environments.

Arista Networks Part Number	SFP-100FX-31	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	0 to 70°C	Protocols	IEEE 802.3z, SFF-8472, FC-PI, SFP MSA (INF-8074i) Compliant

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Q: Will the DOM laser bias current readings stay accurate if my network closet gets up to 45°C? By U***h on 2026-01-05

A: Yes, the built-in DOM microchip is calibrated to report accurate real-time telemetry across its entire 0°C to 70°C operating window. By admin on 2026-01-06
Q: Do these 155M SFP modules support hot-swapping, or do I need to reboot my edge router to get the system to recognize the module? By X***h on 2025-11-29

A: They are fully hot-pluggable. You can swap them live without interrupting the rest of your rack's traffic. By admin on 2025-11-30
Q: Can I use a standard single-mode Duplex LC patch cord with this transceiver if the run is very short? By V***n on 2025-08-27

A: No, this is an MMF (multimode) transceiver utilizing a 1310nm FP laser designed specifically for multi-mode fiber cores. By admin on 2025-08-28
Q: We accidentally ordered a single-mode patch cord. Can we use a mode-conditioning cable to make this 155M multi-mode SFP module work over it? By Y***r on 2025-07-14

A: Mode-conditioning cables are meant for the opposite scenario (SMF optics over MMF). For this module, you must use a dedicated duplex LC multi-mode fiber patch cord. By admin on 2025-07-15
Q: Does this transceiver support old-school OC-3 ATM telecom links, or is it strictly for Fast Ethernet? By W***r on 2025-03-15

A: It supports both! The 155Mbps physical layer rate is perfectly timed for both Fast Ethernet (100BASE-FX) and SONET legacy equipment. By admin on 2025-03-16

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N***y

India

Verified Purchase

5 .0

2026-01-27

Excellent price to performance ratio for these 2km MMF SFP modules. Will buy more.

15 Helpful vote Comments

N***t

Germany

Verified Purchase

4 .0

2026-01-18

Modules perform exactly up to the 2km MMF SFP module specifications on our multi-mode network. However, the plastic dust caps on the Duplex LC ports were a bit loose in the bag and one had fallen off. Cleaned the optical face just in case and it works flawlessly. Good cheap alternative to expensive OEM optics.

18 Helpful vote Comments

A***t

Sweden

Verified Purchase

5 .0

2025-11-17

Awesome value for 155M SFP optical transceiver. Finding reliable modules with real DOM capabilities at this price point is getting hard. Checked the EEPROM info and it's perfectly coded for our switch.

57 Helpful vote Comments

M***x

Canada

Verified Purchase

5 .0

2025-10-30

Been running 24/7 in our indoor network closet for weeks, zero frame loss.

21 Helpful vote Comments

J***n

Austria

Verified Purchase

5 .0

2025-10-11

Perfect compatibility match for our legacy fiber rings. The 155Mbps speed is highly stable and the Duplex LC ports lock in securely. No random link drops or port flapping whatsoever. (•‿•)

56 Helpful vote Comments

L***r

Spain

Verified Purchase

5 .0

2025-08-14

I handle the network infrastructure for a large hospital campus where we still have legacy medical imaging systems hooked up via 155Mbps multi-mode fiber lines. When our OEM transceivers started failing, the original vendor quoted an absurd lead time and price. We decided to test these Fast Ethernet 155M SFP modules as an alternative. Not only did they link up instantly with our legacy edge switches, but the DDM diagnostic data is actually cleaner than the original OEM optics. They have handled heavy DICOM image transfers for over 3 weeks straight without a single interface error. Exceptional product!

83 Helpful vote Comments

C***r

Norway

Verified Purchase

5 .0

2025-07-05

Our telecom firm specializes in retrofitting older multi-tenant building complexes where pulling new single-mode fiber is cost-prohibitive, so we have to maximize the existing legacy multi-mode fiber infrastructure. These 2km MMF SFP modules allow us to deliver stable 155Mbps dedicated circuits for legacy building control systems and fire alarms. The Duplex LC connectors have solid mechanical latching, preventing loose connections in vibrating telecom risers. We've purchased over 100 units so far, and the failure rate is exactly 0%. Will continue to source our multimode optics transceivers from here.

149 Helpful vote Comments

L***d

Australia

Verified Purchase

5 .0

2025-06-19

Great value. Our procurement team was happy with the wholesale pricing. Installed them on a multi-floor university network setup using multi-mode fiber. Highly recommended for network admins on a budget!

67 Helpful vote Comments

M***t

Brazil

Verified Purchase

5 .0

2025-04-04

We deployed these 2km MMF SFP modules in an enterprise office environment for old print-server VLAN lines. They support the standard STM-1/OC-3 protocols flawlessly. DDM telemetry shows very stable TX/RX power levels.

36 Helpful vote Comments