We're looking to use these in a mixed Cisco/Juniper environment. Will the LS-BL49311G-10I auto-negotiate, or do we need to hard-set the speed and duplex?

Great question. This module is MSA compliant and supports auto-negotiation for speed and duplex. In our experience, it works plug-and-play in both Cisco and Juniper switches. However, if you have a legacy switch, it's always good practice to hard-set the interface to 1000-Full to avoid any negotiation issues. The module will work at 1.25Gbps without a problem.

We have an outdoor cabinet that sees temperatures from -20°C to 65°C. Can this industrial-grade SFP handle that, and do you have any real-world data on reliability in such environments?

Yes, absolutely. The LS-BL49311G-10I is rated for -40°C to 85°C, so your temperature range is well within its specs. We've deployed these in similar outdoor setups for security cameras and Wi-Fi backhauls. The industrial components are much more reliable than commercial-grade SFPs in harsh conditions. We recommend using a good quality single-mode fiber with a Simplex LC connector for the best link stability.

I'm using a 1G BiDi SFP for a 10km link. What's the actual RX power I should expect on the receiver side, and how accurate is the DOM monitoring?

The TX power for this 1490nm-TX/1310nm-RX module is rated from -9 to 0 dBm. Over a 10km run with standard SMF, you can expect around -5 to -8 dBm at the receiver, which is well above the sensitivity threshold of -23 dBm. The DOM monitoring is quite accurate, within ±3dB for power, so it's excellent for tracking link health and spotting degradation over time.

We have fiber runs of up to 8km. Can this module be used for both data and video over the same single-mode fiber?

Yes, this is a standard Gigabit Ethernet transceiver that can carry IP-based video traffic just like data. It operates at 1.25 Gbps, which is plenty for high-definition video streams. The BiDi SFP uses a Simplex LC connector and transmits at 1490nm and receives at 1310nm over one fiber, making it perfect for your 8km runs. Just ensure your video encoders/switches support a 1G SFP slot.

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LINK-PP LS-BL49311G-10I 1G BiDi SFP 1490nm-TX/1310nm-RX 10km DOM Simplex LC SMF Optical Transceiver Module (Industrial)

Name: LINK-PP LS-BL49311G-10I 1G BiDi SFP 1490nm-TX/1310nm-RX 10km DOM Simplex LC SMF Optical Transceiver Module (Industrial)
Brand: LINK-PP
SKU: 183657
Price: 12.9 USD
Availability: InStock
Rating: 4.9 (28 reviews)

# 183657

Product: LINK-PP LS-BL49311G-10I 1G BiDi SFP 1490nm-TX/1310nm-RX 10km DOM Simplex LC SMF Optical Transceiver Module (Industrial)
SKU: 183657
P/N: LS-BL49311G-10I
Price: $ 15
Stock: 1100 in Stock
Sold: 920
Product URL: https://www.l-p.com/products/478627.htm

For Order Over $1000 Get $15.00 Off , Code: Linkpp15

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Manufacture: LINK-PP

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Compatible:: LINK-PP

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-BL49311G-10I 1G BiDi SFP Specifications

The LINK-PP LS-BL49311G-10I 1G BiDi SFP transceiver reliably transmits data at 1.25 Gbps over single-mode fiber up to 10 km. With transmit and receive wavelengths of 1490 and 1310 nm, respectively, this industrial-grade module is built to deliver consistent performance in harsh environments where durability and long-term stability are essential.

LINK-PP Part Number	LS-BL49311G-10I	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	1.25Gbps
Wavelength	1490nm-TX/1310nm-RX	Max Cable Distance	10km
Connector	Simplex LC	Media	SMF
Transmitter Type	DFB BiDi	Receiver Type	PIN
TX Power	-9 to 0dBm	RX Power	-23 to -1dBm
Receiver Sensitivity	<-23dBm	Receiver Overload	-1dBm
Operating Temperature Range	-40 to 85°C	Protocols	Fast Ethernet, Gigabit Fibre Channel, MSA Compliant

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Q: We're looking to use these in a mixed Cisco/Juniper environment. Will the LS-BL49311G-10I auto-negotiate, or do we need to hard-set the speed and duplex? By N***l on 2026-04-09

A: Great question. This module is MSA compliant and supports auto-negotiation for speed and duplex. In our experience, it works plug-and-play in both Cisco and Juniper switches. However, if you have a legacy switch, it's always good practice to hard-set the interface to 1000-Full to avoid any negotiation issues. The module will work at 1.25Gbps without a problem. By admin on 2026-04-10
Q: We have an outdoor cabinet that sees temperatures from -20°C to 65°C. Can this industrial-grade SFP handle that, and do you have any real-world data on reliability in such environments? By D***s on 2025-12-22

A: Yes, absolutely. The LS-BL49311G-10I is rated for -40°C to 85°C, so your temperature range is well within its specs. We've deployed these in similar outdoor setups for security cameras and Wi-Fi backhauls. The industrial components are much more reliable than commercial-grade SFPs in harsh conditions. We recommend using a good quality single-mode fiber with a Simplex LC connector for the best link stability. By admin on 2025-12-23
Q: I'm using a 1G BiDi SFP for a 10km link. What's the actual RX power I should expect on the receiver side, and how accurate is the DOM monitoring? By E***l on 2025-10-11

A: The TX power for this 1490nm-TX/1310nm-RX module is rated from -9 to 0 dBm. Over a 10km run with standard SMF, you can expect around -5 to -8 dBm at the receiver, which is well above the sensitivity threshold of -23 dBm. The DOM monitoring is quite accurate, within ±3dB for power, so it's excellent for tracking link health and spotting degradation over time. By admin on 2025-10-12
Q: We have fiber runs of up to 8km. Can this module be used for both data and video over the same single-mode fiber? By N***s on 2024-09-12

A: Yes, this is a standard Gigabit Ethernet transceiver that can carry IP-based video traffic just like data. It operates at 1.25 Gbps, which is plenty for high-definition video streams. The BiDi SFP uses a Simplex LC connector and transmits at 1490nm and receives at 1310nm over one fiber, making it perfect for your 8km runs. Just ensure your video encoders/switches support a 1G SFP slot. By admin on 2024-09-12

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J***n

Turkey

Verified Purchase

5 .0

2026-03-27

Using these in a large enterprise network upgrade. The DOM feature helps a lot with monitoring link health.

69 Helpful vote Comments

M***l

Brazil

Verified Purchase

5 .0

2026-02-01

Installed in a 3rd-party switch with no issues. Definitely a cost-effective alternative to brand-name optics.

10 Helpful vote Comments

J***h

Morocco

Verified Purchase

5 .0

2026-01-21

Great for outdoor Wi-Fi backhaul. The -40 to 85°C rating is crucial for our Canadian winters. ;)

91 Helpful vote Comments

D***r

Philippines

Verified Purchase

5 .0

2025-12-31

This LS-BL49311G-10I is our go-to for 1G BiDi SFPs. MSA compliant and plays nice with our Cisco, Arista, and HP switches. We've deployed hundreds in our campus network, and the DOM monitoring gives us great visibility into link performance.

90 Helpful vote Comments

J***n

United Arab Emirates

Verified Purchase

5 .0

2025-12-23

We use these for all our standard 1G fiber runs now. Reliable and cheap enough to keep spares. =D

68 Helpful vote Comments

D***n

India

Verified Purchase

5 .0

2025-12-23

Hot-swappable and immediately recognized by our Juniper gear. The industrial temp range is a big plus.

40 Helpful vote Comments

B***n

Sweden

Verified Purchase

5 .0

2025-11-20

Deployed 20 of these in our campus network for inter-building links. Solid performance at 1.25Gbps.

72 Helpful vote Comments

A***r

Hungary

Verified Purchase

5 .0

2025-11-15

Excellent link quality over 8km of single-mode fiber. No CRC errors so far. :D

54 Helpful vote Comments

E***s

Ireland

Verified Purchase

5 .0

2025-10-09

Works like a charm for my 10G NAS downgrade to 1G uplink. Simplex LC saved me from running new fiber.

77 Helpful vote Comments

R***e

Nepal

Verified Purchase

5 .0

2025-10-06

For the price, this 1.25Gbps SFP is unbeatable. Used it to extend our office network to a new building.

25 Helpful vote Comments

M***r

Italy

Verified Purchase

5 .0

2025-08-04

Great little module for PTP links. The 1490nm TX and 1310nm RX combo works as advertised.

14 Helpful vote Comments

N***z

Germany

Verified Purchase

5 .0

2025-07-18

Works well in our data center for top-of-rack switches. Good compatibility with Intel NICs.

1 Helpful vote Comments

I***z

Indonesia

Verified Purchase

4 .0

2025-06-23

Shipping took a bit longer than expected, but the module is performing well in our metro Ethernet network.

72 Helpful vote Comments

T***n

Netherlands

Verified Purchase

5 .0

2025-04-09

As a network admin for a school district, I appreciate the value and reliability of these. We use them with our 1490nm-TX/1310nm-RX SFPs to connect remote buildings. It's a perfect, cost-effective solution for extending our network over existing single-mode fiber without needing new hardware.

73 Helpful vote Comments

L***s

Germany

Verified Purchase

4 .0

2025-03-13

One module arrived with a slightly loose dust cap, but the unit itself works perfectly. We've tested it for 1.25Gbps data rate and it delivers. For the price, it's a steal. Just wish the packaging was a bit more secure.

15 Helpful vote Comments

K***s

Hong Kong

Verified Purchase

5 .0

2025-03-03

Works great with my Cisco switch, no config issues. DOM data reads accurate. =)

15 Helpful vote Comments

E***s

Cambodia

Verified Purchase

5 .0

2025-03-01

Plugged it into our MikroTik switch and it worked instantly. Good value for a 10km SMF SFP.

56 Helpful vote Comments

P***s

New Zealand

Verified Purchase

5 .0

2025-01-13

Replaced a failing OEM module with this LINK-PP unit in a critical 1.25Gbps backbone link. The DOM data shows it's running well within spec, and the link has been rock solid for a month now. It's a great budget-friendly 10km SFP solution for our metro access rings.

20 Helpful vote Comments

J***l

Philippines

Verified Purchase

5 .0

2024-11-24

These SFPs are perfect for our ISP's customer premise equipment. They provide a stable 10km connection over single-mode fiber for our business fiber-to-the-premises (FTTP) clients. The 1490nm-TX and 1310nm-RX wavelengths are standard, and the DOM helps us troubleshoot link issues from the NOC.

37 Helpful vote Comments

L***z

Ireland

Verified Purchase

5 .0

2024-10-07

We deployed 50 of these in our new office campus for the Gigabit Ethernet backbone. They negotiated link immediately at 1.25Gbps with our core switches. The fact that it's a Simplex LC BiDi SFP let us double our fiber capacity. Another solid product from LINK-PP.

9 Helpful vote Comments

A***l

Turkey

Verified Purchase

5 .0

2024-10-04

We've been standardizing on these for all new 1G single-fiber installs. The industrial temperature range (-40 to 85°C) makes them versatile for both indoor IDFs and outdoor cabinets. The digital diagnostic features are a must for proactive network maintenance.

62 Helpful vote Comments

S***e

France

Verified Purchase

5 .0

2024-07-30

Decent 1G BiDi SFP for the price. Running at 1490nm-TX/1310nm-RX with no errors.

85 Helpful vote Comments

P***z

Macao

Verified Purchase

5 .0