Will this 1G SFP BiDi module plug and play with our existing Cisco Catalyst and Juniper switches, or do we need specific OEM coding?

Yes, it's fully MSA compliant and highly interoperable across multi-brand switches. For absolute certainty, you can select your specific OEM brand (like Cisco, Juniper, HPE, etc.) before purchasing, and we will flash the EEPROM to ensure flawless plug-and-play compatibility.

Is this 40km single-mode SFP compliant with standard Gigabit Ethernet and Fibre Channel protocols for our enterprise data center?

Yes, the module strictly adheres to IEEE 802.3z standards for Fast and Gigabit Ethernet, and is fully compliant with 1G Fibre Channel protocols. This guarantees industry standard compliance and safe integration into strict enterprise network environments.

The specs show a 0 to 70°C operating temperature. Do you have an industrial wide-temperature version for outdoor telecom cabinets?

Yes, the LS-BL31491G-40C is our commercial-grade indoor version. If you are deploying in harsh outdoor environments, we offer the corresponding industrial-grade model (LS-BL31491G-40I), which is engineered to operate safely in extreme temperatures ranging from -40°C to 85°C.

We're dealing with tight project deadlines. What is the standard delivery cycle for a bulk order of 500+ LS-BL31491G-40C modules to the US?

We maintain stable inventory levels to ensure supply chain reliability. An order of 500+ units is typically processed within 3 days. With standard express delivery, they will arrive at your US facility in approximately 3 to 5 business days.

Can I use a standard SC patch cord with this transceiver, or is it strictly limited to LC connectors?

This specific module features a Simplex LC optical interface to support high-density switch ports. You must use a Simplex LC-to-LC single-mode fiber patch cord. If you are connecting to older legacy equipment with SC ports, you will need a specialized LC-to-SC adapter cable.

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LINK-PP LS-BL31491G-40C 1G SFP BiDi 1310nm-TX/1490nm-RX 40km Simplex LC DOM SMF Optical Transceiver Module

Name: LINK-PP LS-BL31491G-40C 1G SFP BiDi 1310nm-TX/1490nm-RX 40km Simplex LC DOM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 181228
Price: 14.448 USD
Availability: InStock
Rating: 5 (34 reviews)

# 181228

Product: LINK-PP LS-BL31491G-40C 1G SFP BiDi 1310nm-TX/1490nm-RX 40km Simplex LC DOM SMF Optical Transceiver Module
SKU: 181228
P/N: LS-BL31491G-40C
Price: $ 16.8
Stock: 655 in Stock
Sold: 845
Product URL: https://www.l-p.com/products/476191.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-BL31491G-40C

Compatible:: Cisco; LINK-PP; Alcatel-Lucent; Avaya; Brocade; DELL; Extreme; FS; Fortinet; Generic; H3C; HPE; HW; Juniper; Netgear

Compatible P/N:: LS-BL31551G-02C | 2km; LS-BL55311G-02C | 2km; LS-BL31551G-03C | 3km; LS-BL31551G-03I | 3km; LS-BL55311G-03C | 3km; LS-BL55311G-03I | 3km; LS-BL31491G-10C | 10km; LS-BL31491G-10I | 10km; LS-BL31551G-10C | 10km; LS-BL31551G-10I | 10km; LS-BL31551GE-10C | 10km; LS-BL49311G-10C | 10km; LS-BL49311G-10I | 10km; LS-BL49551G-10C | 10km; LS-BL49551G-10I | 10km; LS-BL55311G-10C | 10km; LS-BL55311G-10I | 10km; LS-BL55311GE-10C | 10km; LS-BL55491G-10C | 10km; LS-BL55491G-10I | 10km; LS-BL31551G-15C | 15km; LS-BL31491G-20C | 20km; LS-BL31491G-20I | 20km; LS-BL31551G-20C | 20km; LS-BL31551G-20I | 20km; LS-BL49311G-20C | 20km; LS-BL49311G-20I | 20km; LS-BL49551G-20C | 20km; LS-BL55311G-20C | 20km; LS-BL55311G-20I | 20km; LS-BL55491G-20C | 20km; LS-BL31491G-40C | 40km; LS-BL31491G-40I | 40km; LS-BL31551G-40C | 40km; LS-BL31551G-40I | 40km; LS-BL49311G-40C | 40km; LS-BL49311G-40I | 40km; LS-BL55311G-40C | 40km; LS-BL55311G-40I | 40km; LS-BL31551G-60C | 60km; LS-BL31551G-60I | 60km; LS-BL49551G-60C | 60km; LS-BL55311G-60C | 60km; LS-BL55311G-60I | 60km; LS-BL55491G-60C | 60km; LS-BL27331G-80C | 80km; LS-BL33271G-80C | 80km; LS-BL49551G-80C | 80km; LS-BL49551G-80I | 80km; LS-BL55491G-80C | 80km; LS-BL55491G-80I | 80km; LS-BL49551G-A0C | 100km; LS-BL49551G-A0I | 100km; LS-BL55491G-A0C | 100km; LS-BL55491G-A0I | 100km; LS-BL49551G-A2C | 120km; LS-BL49551G-A2I | 120km; LS-BL55491G-A2C | 120km; LS-BL55491G-A2I | 120km; LS-BL49551G-A5C | 150km; LS-BL49551G-A5I | 150km; LS-BL55491G-A5C | 150km; LS-BL55491G-A5I | 150km; LS-BL49551G-A6C | 160km; LS-BL49551G-A6I | 160km; LS-BL55491G-A6C | 160km; LS-BL55491G-A6I | 160km

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LINK-PP LS-BL31491G-40C 1G SFP Specifications

The LINK-PP LS-BL31491G-40C is a high-performance 1G SFP BiDi transceiver designed for reliable Gigabit Ethernet connections. Operating over a single single-mode fiber, this commercial-grade module integrates advanced optical sub-assemblies to deliver robust data transmission up to 40km. It complies fully with industry standards, ensuring seamless network performance across diverse hardware configurations.

LINK-PP Part Number	LS-BL31491G-40C	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	1.25Gbps
Wavelength	1310nm-TX/1490nm-RX	Max Cable Distance	40km
Connector	Simplex LC	Media	SMF
Transmitter Type	DFB	Receiver Type	PIN
TX Power	-5 to 0dBm	RX Power	-23 to -1dBm
Receiver Sensitivity	<-24dBm	DOM Support	Yes
Operating Temperature Range	0 to 70°C	Protocols	Fast Ethernet, Gigabit Fibre Channel, MSA Compliant

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Q: Will this 1G SFP BiDi module plug and play with our existing Cisco Catalyst and Juniper switches, or do we need specific OEM coding? By D***s on 2026-03-06

A: Yes, it's fully MSA compliant and highly interoperable across multi-brand switches. For absolute certainty, you can select your specific OEM brand (like Cisco, Juniper, HPE, etc.) before purchasing, and we will flash the EEPROM to ensure flawless plug-and-play compatibility. By admin on 2026-03-06
Q: Is this 40km single-mode SFP compliant with standard Gigabit Ethernet and Fibre Channel protocols for our enterprise data center? By A***z on 2025-09-14

A: Yes, the module strictly adheres to IEEE 802.3z standards for Fast and Gigabit Ethernet, and is fully compliant with 1G Fibre Channel protocols. This guarantees industry standard compliance and safe integration into strict enterprise network environments. By admin on 2025-09-14
Q: The specs show a 0 to 70°C operating temperature. Do you have an industrial wide-temperature version for outdoor telecom cabinets? By J***r on 2025-06-21

A: Yes, the LS-BL31491G-40C is our commercial-grade indoor version. If you are deploying in harsh outdoor environments, we offer the corresponding industrial-grade model (LS-BL31491G-40I), which is engineered to operate safely in extreme temperatures ranging from -40°C to 85°C. By admin on 2025-06-21
Q: We're dealing with tight project deadlines. What is the standard delivery cycle for a bulk order of 500+ LS-BL31491G-40C modules to the US? By R***t on 2025-03-24

A: We maintain stable inventory levels to ensure supply chain reliability. An order of 500+ units is typically processed within 3 days. With standard express delivery, they will arrive at your US facility in approximately 3 to 5 business days. By admin on 2025-03-24
Q: Can I use a standard SC patch cord with this transceiver, or is it strictly limited to LC connectors? By J***z on 2025-03-14

A: This specific module features a Simplex LC optical interface to support high-density switch ports. You must use a Simplex LC-to-LC single-mode fiber patch cord. If you are connecting to older legacy equipment with SC ports, you will need a specialized LC-to-SC adapter cable. By admin on 2025-03-14

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S***s

Ecuador

Verified Purchase

5 .0

2026-02-11

We bulk deployed these LS-BL31491G-40C modules for a gigabit base station backhaul project. The MSA compliant Simplex LC DOM SMF transceiver dropped our CAPEX significantly while maintaining stable 1.25Gbps throughput.

125 Helpful vote Comments

M***g

Philippines

Verified Purchase

4 .0

2026-01-30

Delivery was delayed by customs, but the DOM SMF transceiver booted up perfectly fine.

159 Helpful vote Comments

M***s

Ukraine

Verified Purchase

5 .0

2026-01-28

Great single-mode SFP, multi-brand switch compat tests passed on Juniper and HPE gear. ✅

153 Helpful vote Comments

D***n

Brazil

Verified Purchase

5 .0

2026-01-10

The DOM feature gives accurate real-time RX/TX power monitoring for our network ops team.

149 Helpful vote Comments

S***g

Norway

Verified Purchase

5 .0

2025-12-03

Awesome Cisco compatible 1G BiDi, saved our IT budget big time on this project.

126 Helpful vote Comments

B***l

Malaysia

Verified Purchase

5 .0

2025-11-19

Solid 1G SFP BiDi transceiver, fast shipping.

205 Helpful vote Comments

M***n

United States

Verified Purchase

5 .0

2025-08-16

Deployed these 1310nm-TX/1490nm-RX modules in our indoor cabinet, temps stay cool at 0-70°C. ❄️

162 Helpful vote Comments

C***z

Colombia

Verified Purchase

5 .0

2025-07-22

Sourced these for a critical data center link. The 40km single-mode SFP handled Gigabit Fibre Channel flawlessly during stress tests. Commercial 0-70°C temp rating is perfect for our climate-controlled rack enclosures. ( ˘▽˘)っ

53 Helpful vote Comments

J***g

Russian Federation

Verified Purchase

5 .0

2025-07-20

Perfect for our server room bulk deployment.

110 Helpful vote Comments

D***l

Finland

Verified Purchase

5 .0

2025-07-19

Great Simplex LC optical module for the price.

101 Helpful vote Comments

S***k

Bolivia

Verified Purchase

5 .0

2025-07-14

Easy plug and play Gigabit Ethernet SFP.

159 Helpful vote Comments

S***s

Argentina

Verified Purchase

5 .0

2025-06-24

1310nm/1490nm gigabit SFP performs exactly as expected.

162 Helpful vote Comments

C***r

United Arab Emirates

Verified Purchase

5 .0

2025-05-02

Flawless integration with our Fortinet firewall using Simplex LC patching, highly recommend this module! ✨

114 Helpful vote Comments

M***l

Dominican Republic

Verified Purchase

5 .0

2025-04-30

Needed a reliable 1G SFP BiDi 40km for backhaul, this fits the bill perfectly! ⚡

81 Helpful vote Comments

J***n

Ukraine

Verified Purchase

5 .0

2025-04-19

Installed this LS-BL31491G-40C in a Dell switch, linked right up at 1.25Gbps without errors.

179 Helpful vote Comments

E***z

Kazakhstan

Verified Purchase

5 .0

2025-01-14

Impressive receiver sensitivity at <-24dBm on this 1310nm/1490nm gigabit SFP! Upgraded our corporate WAN links using single-strand fiber. DDM metrics read perfectly on our Netgear core switches. Will definitely reorder.

109 Helpful vote Comments

C***l

Finland

Verified Purchase

5 .0

2024-12-19

Flawless Cisco compatible 1G BiDi module.

72 Helpful vote Comments

D***r

Germany

Verified Purchase

5 .0

2024-11-24

Works perfectly for my campus fiber network!

78 Helpful vote Comments

W***r

Israel

Verified Purchase

5 .0

2024-11-21

Excellent DOM support, zero issues so far!

183 Helpful vote Comments

B***z

Ukraine

Verified Purchase

5 .0

2024-10-31

Tested this 1G SFP BiDi transceiver over a 35km campus fiber network. The DFB laser maintains strong TX power around -2dBm. Excellent interoperability with our mixed Cisco and Extreme networks.

158 Helpful vote Comments

C***s

Lithuania

Verified Purchase

5 .0

2024-06-26

Easy to find products and great prices.

35 Helpful vote Comments

J***d

France

Verified Purchase

5 .0

2024-06-24

I have purchased Optical Transceiver Modules in the past and would not hesitate to purchase again.

61 Helpful vote Comments

P***h

Brazil

Verified Purchase

5 .0

2024-06-05

I got my order very quickly and was pleasantly surprised to see great quality of the item. It exceeded my expectations!

32 Helpful vote Comments

N***o

Turkey

Verified Purchase

5 .0

2024-05-11

Lowest price I could find, received the products very quickly.

79 Helpful vote Comments

M***i

United States

Verified Purchase

5 .0

2024-04-22

Prompt shipping and handling, good prices, and great Tech Support.

83 Helpful vote Comments

L***n

Romania

Verified Purchase

5 .0

2023-12-21

good quality and servies, LINK-PP.

44 Helpful vote Comments

S***r

Austria

Verified Purchase

5 .0

2023-12-11

LINK-PP has everything that I need in stock, with the best prices and the Fastest shipping. Shopping here is always a fantastic experience for me. I love LINK-PP and will continue to use it as my provider for all of my fiber optics needs!

28 Helpful vote Comments

S***p

Brunei Darussalam

Verified Purchase

5 .0

2023-11-15

The website is very easy to use, and I appreciate that since a lot of items I order for my technicians I am not aware of. Your website shows exactly what I need and ordering is easy. Really satisfied with the shopping experience.

32 Helpful vote Comments

J***n

United States

Verified Purchase

5 .0

2023-10-31

Work perfectly , Quick and easy to use. Excellent results. More conaistently good results and much easier to use

53 Helpful vote Comments

A***i

United States

Verified Purchase

5 .0