Does this module require a specific matching transceiver on the opposite end of the single-strand fiber link?

Yes. Since this unit transmits at 1490nm (TX) and receives at 1310nm (RX), the opposite end of the simplex fiber link must use a complementary 1G BiDi SFP module with 1310nm-TX and 1490nm-RX (such as the LINK-PP LS-BL31491G-40I) to ensure bidirectional communication.

What is the operating temperature range for this transceiver, and does DDM/DOM monitor real-time temperature in outdoor cabinets?

The LS-BL49311G-40I is an industrial-grade module designed for extreme environments with an operating temperature range of -40°C to +85°C (-40°F to 185°F). Built-in DDM/DOM (Digital Diagnostics Monitoring) allows real-time telemetry monitoring of temperature, TX power, RX power, and laser bias current directly through your switch management GUI or SNMP.

Can this industrial-grade 40km BiDi optic be used for short-distance fiber runs (e.g., under 5km) without damaging the optical receiver?

While it can operate over shorter distances, the high-power 40km DDM laser may saturate or damage the receiver on short links under 5km–10km if the link attenuation is too low. For testing or short spans, we recommend using a 5dB–10dB optical attenuator to keep the RX power within the recommended DOM operating threshold.

Is this LINK-PP LS-BL49311G-40I 1G BiDi SFP module fully compatible with Cisco Catalyst and MikroTik switches without custom firmware modification?

Yes, the LS-BL49311G-40I comes pre-coded for broad OEM compatibility, including Cisco, MikroTik, Ubiquiti, Netgear, and other standard MSA-compliant switches. It supports hot-swappable auto-recognition without needing forced EEPROM or CLI override commands.

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LINK-PP LS-BL49311G-40I 1G BiDi SFP 1490nm-TX/1310nm-RX 40km DOM Simplex LC SMF Optical Transceiver Module (Industrial)

Name: LINK-PP LS-BL49311G-40I 1G BiDi SFP 1490nm-TX/1310nm-RX 40km DOM Simplex LC SMF Optical Transceiver Module (Industrial)
Brand: LINK-PP
SKU: 183659
Price: 15.05 USD
Availability: InStock
Rating: 5 (25 reviews)

# 183659

Product: LINK-PP LS-BL49311G-40I 1G BiDi SFP 1490nm-TX/1310nm-RX 40km DOM Simplex LC SMF Optical Transceiver Module (Industrial)
SKU: 183659
P/N: LS-BL49311G-40I
Price: $ 17.5
Stock: 880 in Stock
Sold: 720
Product URL: https://www.l-p.com/products/478629.htm

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Manufacture: LINK-PP

P/N: LS-BL49311G-40I

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-40I 1G BiDi SFP Specifications

The LINK-PP LS-BL49311G-40I 1G BiDi SFP transceiver delivers reliable 1.25 Gbps connectivity over single-mode fiber using 1490nm-TX/1310nm-RX wavelengths, with transmission distances of up to 40 km. It is fully tested to ensure seamless interoperability with LINK-PP networking platforms, making it suitable for stable, long-distance optical communication in industrial and enterprise environments.

LINK-PP Part Number	LS-BL49311G-40I	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	1.25Gbps
Wavelength	1490nm-TX/1310nm-RX	Max Cable Distance	40km
Connector	Simplex LC	Media	SMF
Transmitter Type	DFB BiDi	Receiver Type	PIN
TX Power	-5 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: Does this module require a specific matching transceiver on the opposite end of the single-strand fiber link? By P***t on 2026-07-12

A: Yes. Since this unit transmits at 1490nm (TX) and receives at 1310nm (RX), the opposite end of the simplex fiber link must use a complementary 1G BiDi SFP module with 1310nm-TX and 1490nm-RX (such as the LINK-PP LS-BL31491G-40I) to ensure bidirectional communication. By admin on 2026-07-12
Q: What is the operating temperature range for this transceiver, and does DDM/DOM monitor real-time temperature in outdoor cabinets? By R***y on 2026-03-03

A: The LS-BL49311G-40I is an industrial-grade module designed for extreme environments with an operating temperature range of -40°C to +85°C (-40°F to 185°F). Built-in DDM/DOM (Digital Diagnostics Monitoring) allows real-time telemetry monitoring of temperature, TX power, RX power, and laser bias current directly through your switch management GUI or SNMP. By admin on 2026-03-04
Q: Can this industrial-grade 40km BiDi optic be used for short-distance fiber runs (e.g., under 5km) without damaging the optical receiver? By S***s on 2025-07-05

A: While it can operate over shorter distances, the high-power 40km DDM laser may saturate or damage the receiver on short links under 5km–10km if the link attenuation is too low. For testing or short spans, we recommend using a 5dB–10dB optical attenuator to keep the RX power within the recommended DOM operating threshold. By admin on 2025-07-06
Q: Is this LINK-PP LS-BL49311G-40I 1G BiDi SFP module fully compatible with Cisco Catalyst and MikroTik switches without custom firmware modification? By A***s on 2025-06-24

A: Yes, the LS-BL49311G-40I comes pre-coded for broad OEM compatibility, including Cisco, MikroTik, Ubiquiti, Netgear, and other standard MSA-compliant switches. It supports hot-swappable auto-recognition without needing forced EEPROM or CLI override commands. By admin on 2025-06-25

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T***l

Hungary

Verified Purchase

5 .0

2026-07-19

Using these for 1000BASE-BX40 links between distribution switches. Simplex LC optics cut our patch panel cabling complexity in half while maintaining full gigabit line rate.

22 Helpful vote Comments

J***n

Maldives

Verified Purchase

5 .0

2026-05-02

Replaced expensive OEM transceivers with this industrial BiDi SFP transceiver in our municipal traffic cabinets. Operating stably through high summer heat and cold nights. =)

48 Helpful vote Comments

S***h

Sweden

Verified Purchase

4 .0

2026-04-20

The LS-BL49311G-40I optical transceiver performs as advertised on our 35km link, but delivery took two days longer than expected due to local courier delay. Otherwise great module.

19 Helpful vote Comments

S***t

France

Verified Purchase

5 .0

2026-01-25

Flawless performance.

82 Helpful vote Comments

S***l

Ukraine

Verified Purchase

5 .0

2026-01-05

Installed this 1G BiDi SFP 40km module in our outdoor NEMA enclosure last month. Temperature drops below freezing here, but the industrial rating holds up solid without any optic degradation.

93 Helpful vote Comments

L***z

Australia

Verified Purchase

5 .0

2025-12-05

Zero issues.

36 Helpful vote Comments

A***n

Ireland

Verified Purchase

5 .0

2025-11-04

Top quality.

55 Helpful vote Comments

Z***r

Italy

Verified Purchase

5 .0

2025-10-19

Fully compatible.

25 Helpful vote Comments

C***y

Iran, Islamic Republic of

Verified Purchase

5 .0

2025-10-09

Bench tested the LINK-PP 1G BiDi 1490nm/1310nm 40km DOM module using a VIAVI optical loss test set prior to field installation. Attenuation was consistent across the 1.25Gbps link, and the DOM diagnostics reported exact optical power within 0.3 dB of hardware meters. Very satisfied with the precision and thermal tolerance :-D

32 Helpful vote Comments

J***r

Japan

Verified Purchase

5 .0

2025-08-28

Super reliable.

18 Helpful vote Comments

N***t

Ireland

Verified Purchase

5 .0

2025-06-16

Great B2B pricing and genuine industrial grade components. DDM monitoring functions properly on our netflow dashboard. Will keep LINK-PP as our primary transceiver supplier. ;)

12 Helpful vote Comments

S***y

Lithuania

Verified Purchase

5 .0

2025-01-08

Fast shipping! :-)

7 Helpful vote Comments

B***n

Germany

Verified Purchase

5 .0

2024-12-02

Bought this 1G BiDi LC SMF module for a remote solar-powered node. Low power consumption and the wide temperature range (-40C to 85C) make it perfect for harsh off-grid environments.

3 Helpful vote Comments

R***s

Finland

Verified Purchase

5 .0

2024-11-24

Tested compatibility on Ubiquiti EdgeSwitch and FS patch panels. Recognized instantly without forcing EEPROM overrides. Excellent budget-friendly B2B option for ISP deployment.

48 Helpful vote Comments

S***z

Singapore

Verified Purchase

5 .0

2024-10-26

Upgraded our municipal surveillance backhaul using the LS-BL49311G-40I single-mode SFP. Paired seamlessly with the matching 1310nm-TX/1490nm-RX modules on the remote end. Real-time DOM telemetry allows our network engineers to monitor light levels remotely, preventing potential fiber degradation downtime. Truly impressive industrial optics at a fraction of major OEM prices.

45 Helpful vote Comments

L***s

Israel

Verified Purchase

5 .0

2024-10-04

Plug and play.

37 Helpful vote Comments

A***h

Austria

Verified Purchase

5 .0

2024-08-28

Needed a reliable 1490nm-TX 1310nm-RX singlemode SFP for base station backhaul. DOM telemetry gives accurate temperature and TX/RX power data directly to our SNMP monitoring.

73 Helpful vote Comments

P***y

Ukraine

Verified Purchase

5 .0

2024-08-20

Works perfectly. =D

54 Helpful vote Comments

G***t

Turkey

Verified Purchase

5 .0

2024-08-19

Needed a reliable simplex LC SMF optic for a 1G link across town. The 40km range provides plenty of headroom for loss, and connection synced immediately on HP ProCurve switches.

3 Helpful vote Comments

T***n

Republic of Korea

Verified Purchase

5 .0

2024-05-16

We do bulk deployments for rural broadband projects. These LINK-PP industrial Grade BiDi modules are cost-effective, durable, and deliver rock-solid stability in exposed outdoor cabinets. =D

27 Helpful vote Comments

H***l

United Arab Emirates

Verified Purchase

5 .0

2024-03-27

Great value 1000BASE-BX40-D SFP module for single strand fiber runs. Plugged right into our MikroTik CCR router with zero vendor lock issues.

16 Helpful vote Comments

H***s

Finland

Verified Purchase

5 .0

2024-03-12

100% recommended.

55 Helpful vote Comments

N***r

Malaysia

Verified Purchase

5 .0

2024-02-26

We deployed 12 units of the LINK-PP LS-BL49311G-40I across a regional campus network link spanning 28km. Optical power levels read -6.2 dBm via DDM/DOM on our Cisco Catalyst switches, well within operating margins. The 1490nm-TX/1310nm-RX simplex LC setup saved us half our fiber core leased costs instantly. Solid build quality! :D

11 Helpful vote Comments

P***r

France

Verified Purchase

5 .0

2024-02-22

Good optics. ;)

26 Helpful vote Comments

G***s

Libyan Arab Jamahiriya

Verified Purchase

5 .0

2024-02-01

Solid 1.25G BiDi LC 40km transceiver. Signal loss remains well under budget over a 32km single-mode link. Will order another batch for our next fiber expansion.

47 Helpful vote Comments