Is this 4G 1310nm 40km SFP module compatible with legacy Brocade SAN switches, Cisco MDS Fibre Channel switches, and multi-vendor industrial Ethernet switches?

Yes. The LS-SM314G-40I adheres strictly to the SFP Multi-Source Agreement (MSA), SFF-8472 diagnostic standards, and 4G Fibre Channel / CPRI protocols. LINK-PP provides customized EEPROM coding compatible with major OEM brands including Cisco, Brocade, Juniper, Alcatel-Lucent, Huawei, and Mikrotik. Digital Diagnostic Monitoring (DDM / DOM) is fully functional, reporting real-time optical power, supply voltage, laser bias current, and operating temperature to your switch CLI or network management system.

What is the main difference between this industrial grade LS-SM314G-40I transceiver and commercial grade 4G SFP modules when deployed in outdoor roadside enclosures or unconditioned utility shelters?

The LS-SM314G-40I is engineered specifically for harsh environments with an extended industrial operating temperature range from -40°C to +85°C (-40°F to 185°F), whereas commercial grade modules are rated for 0°C to 70°C. It utilizes industrial-grade DFB 1310nm lasers and ruggedized optical components designed to withstand extreme thermal cycling, humidity, and vibration in outdoor cabinets, utility substations, and wireless base station CPRI deployments.

Can we use this LINK-PP 4G SFP module for shorter distance fiber runs, such as 3km or 8km single mode fiber links, without risking optical receiver overload or requiring attenuators?

Yes, you can deploy the LS-SM314G-40I on shorter SMF links, but you should monitor real-time light levels using the built-in DOM feature. The optical receiver sensitivity threshold is -20dBm with a maximum overload limit around 0dBm, while the 1310nm DFB laser transmitter outputs between -5dBm and 0dBm. For fiber spans shorter than 5km, we recommend checking switch CLI DDM readings; if RX optical power approaches 0dBm, adding a 3dB to 5dB LC inline optical attenuator will protect the receiver photodiode long term.

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LINK-PP LS-SM314G-40I SFP 4G Fibre Channel 1310nm 40km DOM Duplex LC SMF Optical Transceiver Module (Industrial)

Name: LINK-PP LS-SM314G-40I SFP 4G Fibre Channel 1310nm 40km DOM Duplex LC SMF Optical Transceiver Module (Industrial)
Brand: LINK-PP
SKU: 183330
Price: 21.199 USD
Availability: InStock
Rating: 4.9 (18 reviews)

# 183330

Product: LINK-PP LS-SM314G-40I SFP 4G Fibre Channel 1310nm 40km DOM Duplex LC SMF Optical Transceiver Module (Industrial)
SKU: 183330
P/N: LS-SM314G-40I
Price: $ 24.65
Stock: 420 in Stock
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Product URL: https://www.l-p.com/products/478312.htm

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LINK-PP LS-SM314G-40I 4G SFP Specifications

The LINK-PP LS-SM314G-40I SFP is an industrial-grade transceiver designed for Fibre Channel applications, supporting data rates of up to 4.25Gbps over single-mode fiber (SMF) with transmission distances of up to 40km. Its 1310nm wavelength also helps ensure stable, high-performance optical connectivity over long-haul links.

LINK-PP Part Number	LS-SM314G-40I	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	4.25Gbps
Wavelength	1310nm	Max Cable Distance	40km
Connector	Duplex LC	Media	SMF
Transmitter Type	DFB	Receiver Type	PIN
Receiver Sensitivity	< -17.5dBm	Receiver Overload	-1dBm
TX Power	-2 to +4dBm	RX Power	-20 to -1dBm
Operating Temperature Range	-40 to 85°C	Protocols	MSA Compliant

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Q: Is this 4G 1310nm 40km SFP module compatible with legacy Brocade SAN switches, Cisco MDS Fibre Channel switches, and multi-vendor industrial Ethernet switches? By A***e on 2025-09-08

A: Yes. The LS-SM314G-40I adheres strictly to the SFP Multi-Source Agreement (MSA), SFF-8472 diagnostic standards, and 4G Fibre Channel / CPRI protocols. LINK-PP provides customized EEPROM coding compatible with major OEM brands including Cisco, Brocade, Juniper, Alcatel-Lucent, Huawei, and Mikrotik. Digital Diagnostic Monitoring (DDM / DOM) is fully functional, reporting real-time optical power, supply voltage, laser bias current, and operating temperature to your switch CLI or network management system. By admin on 2025-09-09
Q: What is the main difference between this industrial grade LS-SM314G-40I transceiver and commercial grade 4G SFP modules when deployed in outdoor roadside enclosures or unconditioned utility shelters? By E***s on 2025-03-26

A: The LS-SM314G-40I is engineered specifically for harsh environments with an extended industrial operating temperature range from -40°C to +85°C (-40°F to 185°F), whereas commercial grade modules are rated for 0°C to 70°C. It utilizes industrial-grade DFB 1310nm lasers and ruggedized optical components designed to withstand extreme thermal cycling, humidity, and vibration in outdoor cabinets, utility substations, and wireless base station CPRI deployments. By admin on 2025-03-26
Q: Can we use this LINK-PP 4G SFP module for shorter distance fiber runs, such as 3km or 8km single mode fiber links, without risking optical receiver overload or requiring attenuators? By A***t on 2024-11-27

A: Yes, you can deploy the LS-SM314G-40I on shorter SMF links, but you should monitor real-time light levels using the built-in DOM feature. The optical receiver sensitivity threshold is -20dBm with a maximum overload limit around 0dBm, while the 1310nm DFB laser transmitter outputs between -5dBm and 0dBm. For fiber spans shorter than 5km, we recommend checking switch CLI DDM readings; if RX optical power approaches 0dBm, adding a 3dB to 5dB LC inline optical attenuator will protect the receiver photodiode long term. By admin on 2024-11-27

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A***l

Republic of Korea

Verified Purchase

5 .0

2026-06-22

Needed 4G Fibre Channel transceivers with 1310nm wavelength for base station CPRI links. LINK-PP modules reported DDM stats instantly on Brocade and Cisco switches :-D

87 Helpful vote Comments

N***s

Belgium

Verified Purchase

5 .0

2026-05-19

Ordered 15 units for industrial Ethernet switch upgrades. MSA compliant spec made compatibility effortless across mixed vendor hardware. Will order again! :-)

25 Helpful vote Comments

C***e

Brazil

Verified Purchase

5 .0

2026-05-19

Upgraded our wireless CPRI fronthaul links using these LINK-PP 4G 1310nm 40km optical modules. The duplex LC connectors click securely into place and DFB transmitter output measured +1.5dBm on site. Zero packet drop during a 72-hour stress test. Excellent alternative to costly OEM brands ;)

4 Helpful vote Comments

B***z

Turkey

Verified Purchase

5 .0

2026-04-14

Deployed these LS-SM314G-40I transceivers inside unheated outdoor cabinets. Operating temperature drops below freezing at night, but light level and optical link remain completely steady.

38 Helpful vote Comments

L***s

Cambodia

Verified Purchase

5 .0

2026-02-28

Strict MSA compliance makes this industrial 4G SFP optical transceiver module a lifesaver for our multi-vendor fiber network. We tested 1310nm LC duplex connections up to 38km SMF distance without signal loss. Optical RX sensitivity remained stable at -18dBm.

65 Helpful vote Comments

K***z

Poland

Verified Purchase

4 .0

2025-12-24

The LS-SM314G-40I industrial optics perform flawlessly at full 4G speed over our 30km fiber loop. Only deducting one star because the shipping box was slightly crushed on arrival, though the internal anti-static packaging protected the transceivers.

96 Helpful vote Comments

Z***l

United States

Verified Purchase

5 .0

2025-11-05

Plug and play, full 4.25Gbps speed achieved ;)

11 Helpful vote Comments

Z***n

Argentina

Verified Purchase

5 .0

2025-10-08

Replaced expensive OEM modules with this LS-SM314G-40I for 4G FC SAN replication between remote sites. Syncs up instantly with zero bit errors.

99 Helpful vote Comments

A***s

Poland

Verified Purchase

5 .0

2025-10-02

Solid industrial 4G SFP module. Flawless 40km link over SMF :)

33 Helpful vote Comments

A***y

Indonesia

Verified Purchase

5 .0

2025-05-28

Excellent industrial optics! =D

89 Helpful vote Comments

M***s

Finland

Verified Purchase

5 .0

2025-05-06

Tested compatibility on Brocade SAN switches and Alcatel-Lucent routers for 4G Fibre Channel replication. The LS-SM314G-40I modules were recognized immediately, reporting accurate laser temperature, voltage, and optical power via DOM. Datasheet specs are 100% accurate =D

3 Helpful vote Comments

P***l

Bangladesh

Verified Purchase

5 .0

2024-12-28

Tested on Juniper and Mikrotik hardware for a long haul 35km LC duplex link. DOM reading shows rock solid optical RX power around -11dBm =)

36 Helpful vote Comments

N***s

Malaysia

Verified Purchase

5 .0

2024-11-13

Super fast dispatch and rugged industrial housing. The 1310nm DFB laser delivers strong optical power across our 40km single mode fiber cable run.

55 Helpful vote Comments

A***s

Lithuania

Verified Purchase

5 .0

2024-10-10

We bought a batch of LS-SM314G-40I industrial SFP transceivers for a 32km single mode fiber link connecting rural monitoring substations. Receiver sensitivity stayed well within -20dBm spec, and DDM telemetry integrates seamlessly with our Zabbix NMS via SNMP. Outstanding stability under harsh weather conditions.

19 Helpful vote Comments

S***r

Romania

Verified Purchase

5 .0

2024-08-16

Works perfectly.

65 Helpful vote Comments

C***s

Morocco

Verified Purchase

5 .0

2024-08-15

Deployed 30 pieces in severe industrial environments ranging from -20℃ cold storage to +65℃ hot boiler plant cabinets. The DDM diagnostic feature is crucial for predictive maintenance, correctly reporting laser bias current and thermal metrics. Outstanding quality and prompt delivery.

50 Helpful vote Comments

A***z

Brunei Darussalam

Verified Purchase

5 .0

2024-04-11

Ideal 4G SFP transceivers for outdoor roadside enclosures. Industrial temperature range -40℃ to 85℃ gives us total peace of mind.

24 Helpful vote Comments

R***z

Mexico

Verified Purchase

4 .0

2024-02-04

Optical specs are spot on and DOM readings match our handheld optical power meter perfectly. Great 1310nm 40km transceivers, but delivery to our UK site took 2 days longer than scheduled.

57 Helpful vote Comments