Will this LINK-PP LS-BL49312G-20I module work out of the box with Cisco switches, or do we need to request custom EEPROM coding before ordering?

By default, these modules come with multi-brand compatibility coding that works smoothly with most major network switches like Cisco, Huawei, HP, MikroTik, and Ubiquiti. However, if you have strict brand-locked switches, you can specify your switch model in the order notes, and our technical team will pre-code the EEPROM for you at no extra cost!

Can this 2.5G SFP BiDi module operate reliably inside an unconditioned outdoor cabinet during summer heatwaves?

Absolutely. This is an industrial-grade transceiver designed specifically for harsh environments. It features a wide operating temperature range (typically supporting -40°C to +85°C) and robust internal thermal management, making it ideal for outdoor enclosures, cell towers, and remote utility boxes. ☀️❄️

Do I need two different fiber strands for this BiDi module, or can it transmit and receive over a single strand of single-mode fiber (SMF)?

This is a BiDi (Bidirectional) transceiver utilizing WDM technology. It transmits on 1490nm and receives on 1310nm (paired with a 1310nm-TX/1490nm-RX module on the other end), allowing you to run full-duplex communication over just a single strand of Simplex LC Single Mode Fiber (SMF), cutting your fiber cabling cost in half!

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LINK-PP LS-BL49312G-20I 2.5G SFP BiDi 1490nm-TX/1310nm-RX 20km DOM Simplex LC SMF Optical Transceiver Module (Industrial)

Name: LINK-PP LS-BL49312G-20I 2.5G SFP BiDi 1490nm-TX/1310nm-RX 20km DOM Simplex LC SMF Optical Transceiver Module (Industrial)
Brand: LINK-PP
SKU: 197928
Price: 10.148 USD
Availability: InStock
Rating: 4.9 (58 reviews)

# 197928

Product: LINK-PP LS-BL49312G-20I 2.5G SFP BiDi 1490nm-TX/1310nm-RX 20km DOM Simplex LC SMF Optical Transceiver Module (Industrial)
SKU: 197928
P/N: LS-BL49312G-20I
Price: $ 11.8
Stock: 1360 in Stock
Sold: 2.1K
Product URL: https://www.l-p.com/products/488462.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

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Compatible:: LINK-PP

Compatible P/N:: LS-BL31492G-10C | 10km; LS-BL49312G-10C | 10km; LS-BL31492G-20C | 20km; LS-BL31492G-20I | 20km; LS-BL31552G-20C | 20km; LS-BL31552G-20I | 20km; LS-BL49312G-20C | 20km; LS-BL49312G-20I | 20km; LS-BL55312G-20C | 20km; LS-BL55312G-20I | 20km; LS-BL31552G-40C | 40km; LS-BL31552G-40I | 40km; LS-BL55312G-40C | 40km; LS-BL55312G-40I | 40km

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LINK-PP LS-BL49312G-20I 2.5G SFP BiDi Specifications

The LINK-PP LS-BL49312G-20I 2.5G SFP BiDi transceiver delivers high-performance data transmission at speeds of up to 2.5 Gbps over single-mode fiber for distances of up to 20 km. With operating wavelengths of 1490 nm (TX) and 1310 nm (RX), this industrial-grade module ensures robust, interference-resistant connectivity, making it ideal for mission-critical and harsh environment deployments.

LINK-PP Part Number	LS-BL49312G-20I	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	2.5Gbps
Wavelength	1490nm-TX/1310nm-RX	Max Cable Distance	20km
Connector	Simplex LC	Media	SMF
Transmitter Type	DFB BiDi	Receiver Type	PIN+TIA
TX Power	-5 to 0dBm	RX Power	-23 to -1dBm
Receiver Sensitivity	<-18dBm	Receiver Overload	-1dBm
Operating Temperature Range	-40 to 85°C	Protocols	Fast Ethernet, Gigabit Fibre Channel, MSA Compliant

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Q: Will this LINK-PP LS-BL49312G-20I module work out of the box with Cisco switches, or do we need to request custom EEPROM coding before ordering? By C***r on 2026-06-03

A: By default, these modules come with multi-brand compatibility coding that works smoothly with most major network switches like Cisco, Huawei, HP, MikroTik, and Ubiquiti. However, if you have strict brand-locked switches, you can specify your switch model in the order notes, and our technical team will pre-code the EEPROM for you at no extra cost! By admin on 2026-06-03
Q: Can this 2.5G SFP BiDi module operate reliably inside an unconditioned outdoor cabinet during summer heatwaves? By E***s on 2025-08-25

A: Absolutely. This is an industrial-grade transceiver designed specifically for harsh environments. It features a wide operating temperature range (typically supporting -40°C to +85°C) and robust internal thermal management, making it ideal for outdoor enclosures, cell towers, and remote utility boxes. ☀️❄️ By admin on 2025-08-25
Q: Do I need two different fiber strands for this BiDi module, or can it transmit and receive over a single strand of single-mode fiber (SMF)? By N***e on 2025-06-11

A: This is a BiDi (Bidirectional) transceiver utilizing WDM technology. It transmits on 1490nm and receives on 1310nm (paired with a 1310nm-TX/1490nm-RX module on the other end), allowing you to run full-duplex communication over just a single strand of Simplex LC Single Mode Fiber (SMF), cutting your fiber cabling cost in half! By admin on 2025-06-11

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C***l

Hong Kong

Verified Purchase

5 .0

2026-05-13

Plugged into our Cisco Catalyst switch and it linked up instantly. Solid 2.5G throughput over single mode fiber across our campus building link. DDM monitoring gives accurate optical power readings (-3.2 dBm TX). Highly recommend for enterprise upgrades.

21 Helpful vote Comments

N***r

Spain

Verified Purchase

5 .0

2026-05-10

Fast shipping and works as advertised.

77 Helpful vote Comments

M***r

Taiwan, Province of China

Verified Purchase

5 .0

2026-05-04

Top quality transceiver.

46 Helpful vote Comments

L***t

United States

Verified Purchase

5 .0

2026-05-04

Flawless enterprise deployment.

65 Helpful vote Comments

N***n

Lithuania

Verified Purchase

5 .0

2026-04-12

We use these for telecom cell tower fiber backhaul extension. Link stability is exceptional over the 20km single mode fiber run. DDM real-time monitoring allows our NOC team to track optical health proactively. Highly professional grade module.

44 Helpful vote Comments

A***s

Macao

Verified Purchase

5 .0

2026-02-16

Super reliable 2.5G speed!

61 Helpful vote Comments

H***s

Denmark

Verified Purchase

5 .0

2026-02-11

Plug and play.

40 Helpful vote Comments

O***s

Ireland

Verified Purchase

5 .0

2026-01-15

We bought a batch of 20 units for our smart city traffic monitoring backhaul. Every single LS-BL49312G-20I transceiver negotiated the 2.5G link cleanly over single mode fiber. Great OEM compatibility, zero coding errors on our managed switches. Will re-order.

31 Helpful vote Comments

A***n

Philippines

Verified Purchase

4 .0

2025-12-27

Solid performance overall. Testing across a 15km rural link connected to an HP Aruba switch without any compatibility warnings. Took about 4 days longer than expected for customs clearance, but once installed, DOM data reporting is spot on.

5 Helpful vote Comments

B***g

Morocco

Verified Purchase

5 .0

2025-12-13

Replaced our old branded optics with these LINK-PP units to cut budget on a university network expansion project. Saved thousands of dollars and performance is identical. Zero packet drops, seamless DDM integration with our SNMP monitoring tools.

96 Helpful vote Comments

B***s

Germany

Verified Purchase

5 .0

2025-08-27

Running a 2.5G home lab NAS backbone linked to the main workshop across the street (~12km). Used a pair of these simplex LC BiDi modules and got instant linkup at full duplex. Absolutely zero issues. Highly satisfied!

12 Helpful vote Comments

E***s

Japan

Verified Purchase

5 .0

2025-07-20

No complaints at all. ✨

76 Helpful vote Comments

S***z

Ukraine

Verified Purchase

4 .0

2025-05-15

Decent product. Works seamlessly with Juniper switches after EEPROM verification. The cardboard box was slightly crushed by the courier, but ESD foam protected the transceiver securely. Happy with the purchase.

25 Helpful vote Comments

I***n

Hong Kong

Verified Purchase

5 .0

2025-05-14

Quick, easy, had it in stock and delivered promptly!

49 Helpful vote Comments

M***s

Germany

Verified Purchase

5 .0

2025-03-23

Running these BiDi SFP modules in our enterprise NAS setup for high-speed inter-rack backups. Getting full wire speed with zero CRC errors. The simplex LC interface cut our fiber patch cord clutter in half. Awesome engineering.

15 Helpful vote Comments

E***l

United States

Verified Purchase

5 .0

2025-03-19

Very stable connection over 18km.

40 Helpful vote Comments

H***n

United Kingdom

Verified Purchase

5 .0

2025-02-27

Good customer service, happy with the service.

17 Helpful vote Comments

P***e

Singapore

Verified Purchase

5 .0

2025-02-26

Product delivered in perfect condition, shipped immediately, excellent service..

29 Helpful vote Comments

M***y

Indonesia

Verified Purchase

5 .0

2025-02-22

Very easy to navigate and easy ordering process.

26 Helpful vote Comments

B***z

Malaysia

Verified Purchase

4 .0

2025-01-16

Good industrial SFP optics. Works great with our Ubiquiti gear, though the plastic dust caps were loose inside the box. Minor annoyance, but the module itself performs flawlessly up to 20km distance.

12 Helpful vote Comments

N***p

Taiwan, Province of China

Verified Purchase

5 .0

2024-12-20

Shipping was extremely Fast, they had what I needed in stock. Great experience!

61 Helpful vote Comments

P***t

Sweden

Verified Purchase

5 .0

2024-12-20

Exceeded expectations!

31 Helpful vote Comments

G***t

Mexico

Verified Purchase

5 .0

2024-12-10

Good service, efficient website. Will come back for more 1x1 Port SFP Cage.

13 Helpful vote Comments

D***n

Denmark

Verified Purchase

5 .0

2024-11-27

Package arrived on time, and Optical Transceiver Module work perfectly.

18 Helpful vote Comments

H***s

France

Verified Purchase

5 .0

2024-11-26

Product looks good excellent and works like a charm.

45 Helpful vote Comments

P***e

Finland

Verified Purchase

5 .0

2024-11-21

It was easy site to navigate and my products delivered Fast.

41 Helpful vote Comments

J***n

Italy

Verified Purchase

5 .0

2024-10-04

Quick and easy ordering with all the options I wanted. Would buy from Link-pp again.

55 Helpful vote Comments

S***s

Iran, Islamic Republic of

Verified Purchase

5 .0

2024-09-19

I have ordered various items over the past couple of years, goods always arrive in a timely manner. They are well packed and do exactly what you expect them to do. Great value for money and efficient service.

69 Helpful vote Comments

S***k

Nepal

Verified Purchase

5 .0

2024-09-12

Deployed in an industrial SCADA network connecting water treatment plants. The wide temperature tolerance and robust build quality stand out compared to standard commercial-grade transceivers. 1310/1490nm BiDi pairing works like a charm.

27 Helpful vote Comments

D***s

Belgium

Verified Purchase

5 .0

2024-08-25

Value for money.

60 Helpful vote Comments

E***z

Canada

Verified Purchase

5 .0

2024-08-11

Works great.

99 Helpful vote Comments

E***n

Romania

Verified Purchase

5 .0

2024-07-18

Placed the order easily, very quick shipping. What's more, the price is much lower than the original, and the products are of the same or better quality. I'm a repeat buyer.

14 Helpful vote Comments

K***e

Morocco

Verified Purchase

5 .0

2024-07-10

Perfect fit for our remote tower backhaul. Industrial temp rating gives us peace of mind during winter freezing conditions. BiDi wavelength division multiplexing makes single-strand fiber utilization super efficient. ⭐

58 Helpful vote Comments

E***g

Australia

Verified Purchase

5 .0

2024-05-25

Deploys smoothly in harsh industrial outdoor cabinets. Temperature fluctuation here is wild (-25°C to +40°C), but this industrial-grade 2.5G BiDi optic hasn't dropped a single packet in three months. The 1490nm/1310nm simplex split saves precious fiber strands.

59 Helpful vote Comments

E***s

Nepal

Verified Purchase

5 .0

2024-05-19

I was able to find what I was looing for at a great price.

51 Helpful vote Comments

I***f

Russian Federation

Verified Purchase

5 .0

2024-05-08

Works great in my switches.

40 Helpful vote Comments

I***a

Ireland

Verified Purchase

5 .0

2024-05-07

Great price and great service prompt delivery!!

27 Helpful vote Comments

F***n

United States

Verified Purchase

5 .0

2024-05-05

Deep dive into diagnostics: tested optical budget using an OTDR and power meter. The 1490nm transmitter output power is very stable, and receiver sensitivity easily handles the 20km attenuation loss margin. DOM feature accurately tracks internal voltage and bias current. Top tier hardware for telecom engineers.

13 Helpful vote Comments

L***l

Denmark

Verified Purchase

5 .0

2024-04-01

The package was a little uncomplete when I received the order.

31 Helpful vote Comments

J***l

United Arab Emirates

Verified Purchase

5 .0

2024-03-06

Exactly what we needed for our WDM setup. Low insertion loss, perfect wavelength alignment, and recognized instantly by our core router. Excellent value for enterprise networking.

86 Helpful vote Comments