Just to confirm, does this duplex LC transceiver require OM2 multi-mode fiber, or can I use it with my existing OM1 or OM3 MMF patch cables?

You can use it with OM1, OM2, OM3, or OM4 MMF! While the maximum 550m transmission distance is officially rated over OM2/OM3, it's fully backwards compatible with older OM1 cables (though the max distance will drop to around 275m).

Hello sir, will this LS-MM851G-S5C plug and play with Cisco Catalyst 9300 series? Also, does it trigger any unsupported transceiver warnings?

Hi! Yes, it is 100% MSA compliant and thoroughly tested for OEM compatibility with Cisco switches, including the Catalyst 9300. It functions just like the original GLC-SX-MMD, so you won't see any "unsupported transceiver" error logs in your CLI.

The specs say this is a commercial 0 to 70°C module. Do you have an industrial version of this exact 850nm SFP that can survive in an outdoor telecom cabinet?

Good question! This commercial-grade model handles indoor data centers and AC-cooled racks perfectly. For harsh outdoor environments or cell tower backhaul, we recommend our industrial-grade counterpart (LS-MM851G-S5I), which supports extreme temperatures from -40°C to 85°C.

I need to deploy around 300 of these 1G SFP transceivers for a new campus network build. Is there any B2B bulk pricing or discount code available?

Absolutely. For enterprise procurement and data center mass deployments, we offer tiered volume discounts. You can check the bulk rates directly on the product page, or contact our sales team via Live Chat for a custom quote on your 300-piece order!

We require full DOM/DDM for our network monitoring system. Does this module support SFF-8472 protocol for tracking TX/RX power and temperature?

Yes, indeed! The LS-MM851G-S5C features built-in Digital Optical Monitoring (DOM) compliant with the SFF-8472 protocol. It allows your sysadmins to monitor real-time diagnostics like temperature, voltage, laser bias current, and TX/RX optical power directly from your switch interface.

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Arista SFP-1G-SX Compatible LINK-PP 1G SFP 850nm 550m Duplex LC DOM MMF Optical Transceiver Module

Name: SFP-1G-SX
Brand: LINK-PP
SKU: 212748
Price: 6.012 USD
Availability: InStock
Rating: 5 (25 reviews)

# 212748

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: Arista SFP-1G-SX Compatible LINK-PP 1G SFP 850nm 550m Duplex LC DOM MMF Optical Transceiver Module

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Manufacture: LINK-PP

P/N: LS-MM851G-S5C

Compatible:: Cisco; LINK-PP; Adtran; Alcatel-Lucent; Allen-Bradley; Allied Telesis; Arista; Avago; Avaya; Broadcom; Brocade; Calix; Ciena; D-Link; DELL; Extreme; F5 Networks; FS; Force10; Fortinet; Generic; H3C; HPE Aruba; HPE H3C; HPE ProCurve; IBM; Intel; Juniper; NVIDIA/Mellanox; Netgear; Palo Alto Networks; ProCurve; SMC Networks; TRENDnet

Compatible P/N:: SFP-1G-SX | 550m; SFP1G-SX-31 | 2km; SFP1G-SX-31-I | 2km

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Arista SFP-1G-SX Compatible LINK-PP 1G SFP Specifications

The Arista SFP-1G-SX Compatible LINK-PP module is a high-performance, commercial-grade SFP transceiver delivering data rates up to 1.25 Gbps. Featuring an 850nm VCSEL transmitter and a duplex LC interface, it operates efficiently over multi-mode fiber for distances up to 550 meters. Complete with digital optical monitoring support, it ensures reliable and stable gigabit network connectivity.

Arista Part Number	SFP-1G-SX	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	1.25Gbps
Wavelength	850nm	Max Cable Distance	550m over OM2 MMF
Connector	Duplex LC	Media	MMF
Transmitter Type	VCSEL	Receiver Type	PIN
TX Power	-9 to 0dBm	RX Power	-20 to -1dBm
Receiver Sensitivity	-18dBm	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: Just to confirm, does this duplex LC transceiver require OM2 multi-mode fiber, or can I use it with my existing OM1 or OM3 MMF patch cables? By D***n on 2026-05-05

A: You can use it with OM1, OM2, OM3, or OM4 MMF! While the maximum 550m transmission distance is officially rated over OM2/OM3, it's fully backwards compatible with older OM1 cables (though the max distance will drop to around 275m). By admin on 2026-05-05
Q: Hello sir, will this LS-MM851G-S5C plug and play with Cisco Catalyst 9300 series? Also, does it trigger any unsupported transceiver warnings? By B***n on 2026-04-28

A: Hi! Yes, it is 100% MSA compliant and thoroughly tested for OEM compatibility with Cisco switches, including the Catalyst 9300. It functions just like the original GLC-SX-MMD, so you won't see any "unsupported transceiver" error logs in your CLI. By admin on 2026-04-28
Q: The specs say this is a commercial 0 to 70°C module. Do you have an industrial version of this exact 850nm SFP that can survive in an outdoor telecom cabinet? By S***n on 2025-11-16

A: Good question! This commercial-grade model handles indoor data centers and AC-cooled racks perfectly. For harsh outdoor environments or cell tower backhaul, we recommend our industrial-grade counterpart (LS-MM851G-S5I), which supports extreme temperatures from -40°C to 85°C. By admin on 2025-11-16
Q: I need to deploy around 300 of these 1G SFP transceivers for a new campus network build. Is there any B2B bulk pricing or discount code available? By A***n on 2025-10-19

A: Absolutely. For enterprise procurement and data center mass deployments, we offer tiered volume discounts. You can check the bulk rates directly on the product page, or contact our sales team via Live Chat for a custom quote on your 300-piece order! By admin on 2025-10-19
Q: We require full DOM/DDM for our network monitoring system. Does this module support SFF-8472 protocol for tracking TX/RX power and temperature? By K***r on 2025-08-15

A: Yes, indeed! The LS-MM851G-S5C features built-in Digital Optical Monitoring (DOM) compliant with the SFF-8472 protocol. It allows your sysadmins to monitor real-time diagnostics like temperature, voltage, laser bias current, and TX/RX optical power directly from your switch interface. By admin on 2025-08-15

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M***z

Argentina

Verified Purchase

5 .0

2026-05-25

Best value 1G MMF transceivers for data center mass deployment. Will order more.

81 Helpful vote Comments

S***s

Venezuela

Verified Purchase

5 .0

2026-05-18

Works great over OM2 MMF patch cables!

223 Helpful vote Comments

S***s

Panama

Verified Purchase

5 .0

2026-05-07

Nice MMF optical transceiver for short links.

52 Helpful vote Comments

R***z

Czech Republic

Verified Purchase

5 .0

2025-11-22

Installed these 850nm VCSEL modules in our racks. Survived perfectly without dropping packets. ☀️

197 Helpful vote Comments

B***n

Macao

Verified Purchase

5 .0

2025-11-22

Solid MSA compliant SFP, plug and play!

150 Helpful vote Comments

D***s

Belgium

Verified Purchase

5 .0

2025-06-19

I'm a network engineer managing a large enterprise rollout. Tested these LS-MM851G-S5C modules across multiple Cisco and Arista switches. The DOM readings are spot-on, and OM2 MMF links remain rock-solid.

186 Helpful vote Comments

K***n

France

Verified Purchase

5 .0

2025-05-16

Great price for bulk 1.25G SFP transceivers.

133 Helpful vote Comments

K***n

Ukraine

Verified Purchase

5 .0