Are these LINK-PP LS-BL49551G-10I modules fully compatible with Cisco catalyst switches, or do I need to run specific CLI commands to bypass vendor lock?

Yes, these transceivers are pre-coded with standard OEM-compatible EEPROM profiles and work out of the box with Cisco, Mikrotik, HPE, and most MSA-compliant switches without requiring any forced third-party optics CLI commands.️

Do we need to buy a pair of different models for both ends of the fiber link, or how does the BiDi work?

Great question! BiDi (Bidirectional) transceivers operate in matched pairs. Since this specific model is 1490nm-TX/1550nm-RX, you need to pair it on the opposite end of the single fiber strand with its counterpart model (which transmits on 1550nm and receives on 1490nm,like LS-BL55491G-10I) to establish a full-duplex 1G link over a single strand of SMF.

What kind of operating temperature range can these handle? We need them for an unconditioned outdoor street cabinet.

These are true industrial-grade (I-grade) transceivers designed to operate reliably in extreme environments, typically supporting a wide temperature range from -40°C to +85°C, making them ideal for unconditioned outdoor enclosures and industrial utility boxes.

What is the exact optical budget or max attenuation supported for the 10km distance specification?

The LS-BL49551G-10I is engineered for standard Single-Mode Fiber (SMF) with a typical optical link budget supporting up to 10km at 1G Ethernet speeds, utilizing 1490nm-TX/1550nm-RX BiDi wavelengths.

Does this industrial SFP support real-time DDM/DOM monitoring for temperature and optical power levels?

Yes, absolutely! It features built-in Digital Diagnostic Monitoring (DDM/DOM), allowing network administrators to monitor real-time temperature, laser bias current, optical output power (TX), and optical input power (RX) directly via your switch management interface.

Breadcrumb: Home; Products; Optics Transceivers | SFP Modules; 1/2/4G Transceiver Modules; 1G BiDi SFP; 203923

Click to open expanded view

LINK-PP LS-BL49551G-10I 1G BiDi SFP 1490nm-TX/1550nm-RX 10km DOM Simplex LC SMF Optical Transceiver Module (Industrial)

Name: LINK-PP LS-BL49551G-10I 1G BiDi SFP 1490nm-TX/1550nm-RX 10km DOM Simplex LC SMF Optical Transceiver Module (Industrial)
Brand: LINK-PP
SKU: 203923
Price: 20.64 USD
Availability: InStock
Rating: 4.9 (30 reviews)

# 203923

Product: LINK-PP LS-BL49551G-10I 1G BiDi SFP 1490nm-TX/1550nm-RX 10km DOM Simplex LC SMF Optical Transceiver Module (Industrial)
SKU: 203923
P/N: LS-BL49551G-10I
Price: $ 24
Stock: 210 in Stock
Sold: 1.9K
Product URL: https://www.l-p.com/products/493369.htm

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

For Order Over $3000 Get $50.00 Off , Code: Linkpp50

For Order Over $5000 Get $100.00 Off , Code: Linkpp100

New Users: $10 Coupon for Orders , Code: linkpp2610

30 Reviews

5 Questions

Request Stock

1.9K Sold

$ 24

Free shipping over $600, If you need a more favorable price, please contact us directly.

Qty (pcs) :

Unit Price :

$ 24

100

$ 22.8

1000

$ 22.08

3000

$ 21.36

6000

$ 20.64

Manufacture: LINK-PP

P/N: LS-BL49551G-10I

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

Shipping:

To Be Negotiated

Free Shipping

Can't deliver

to United States via {{now_chooseship?now_chooseship.name:''}}

Estimated delivery time : {{now_chooseship?now_chooseship.datemin:''}}-{{now_chooseship?now_chooseship.datemax:''}} days. See details

5-Year Warranty 30-Day Returns 30-Day Exchange

Stock:

{{parseInt(detail_data.left_num) ? detail_data.left_num +' in Stock' :detail_data.zeroStockOrder==0?'Out of Stock':'Available'}} .

Quantity:

( Min. Order {{detail_data.prodInfo.minimum_ordered_quantity}} )

undeliverable

Total Price:

{{ detail_data.displayed_price.unit_prefix }} {{ detail_data.displayed_price.original_total_price }} ( {{ detail_data.displayed_price.rate_of_discount }}% OFF ) {{detail_data.displayed_price.ex_sell_type}}

Add to wish

Specifications

Specification
Videos
Matching Products
Download
Q&A
Customer Reviews

LINK-PP LS-BL49551G-10I 1G BiDi SFP Specifications

The LINK-PP LS-BL49551G-10I 1G BiDi SFP transceiver provides reliable Gigabit connectivity over single-mode fiber for industrial environments at distances up to 10 km, enabling bidirectional communication on a single fiber via a simplex LC interface using a 1490nm transmit and 1550nm receive wavelength pair.

LINK-PP Part Number	LS-BL49551G-10I	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	1.25Gbps
Wavelength	1490nm-TX/1550nm-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

Videos

Matching Products

Pictures

ID#

Description

Price

Stock

Add to Cart

Download

Product Drawing

PDF
LS-BL49551G-10I.pdf

Questions & Answers
Ask a Question

No data

Q: Are these LINK-PP LS-BL49551G-10I modules fully compatible with Cisco catalyst switches, or do I need to run specific CLI commands to bypass vendor lock? By J***r on 2026-03-01

A: Hi there! Yes, these transceivers are pre-coded with standard OEM-compatible EEPROM profiles and work out of the box with Cisco, Mikrotik, HPE, and most MSA-compliant switches without requiring any forced third-party optics CLI commands.️ By admin on 2026-03-02
Q: Do we need to buy a pair of different models for both ends of the fiber link, or how does the BiDi work? By L***s on 2025-12-17

A: Great question! BiDi (Bidirectional) transceivers operate in matched pairs. Since this specific model is 1490nm-TX/1550nm-RX, you need to pair it on the opposite end of the single fiber strand with its counterpart model (which transmits on 1550nm and receives on 1490nm,like LS-BL55491G-10I) to establish a full-duplex 1G link over a single strand of SMF. By admin on 2025-12-18
Q: What kind of operating temperature range can these handle? We need them for an unconditioned outdoor street cabinet. By J***n on 2025-08-14

A: These are true industrial-grade (I-grade) transceivers designed to operate reliably in extreme environments, typically supporting a wide temperature range from -40°C to +85°C, making them ideal for unconditioned outdoor enclosures and industrial utility boxes. By admin on 2025-08-14
Q: What is the exact optical budget or max attenuation supported for the 10km distance specification? By B***n on 2025-05-10

A: Hello! The LS-BL49551G-10I is engineered for standard Single-Mode Fiber (SMF) with a typical optical link budget supporting up to 10km at 1G Ethernet speeds, utilizing 1490nm-TX/1550nm-RX BiDi wavelengths. By admin on 2025-05-11
Q: Does this industrial SFP support real-time DDM/DOM monitoring for temperature and optical power levels? By S***n on 2024-10-25

A: Yes, absolutely! It features built-in Digital Diagnostic Monitoring (DDM/DOM), allowing network administrators to monitor real-time temperature, laser bias current, optical output power (TX), and optical input power (RX) directly via your switch management interface. By admin on 2024-10-26

Customer Reviews
Write a Review

{{stardata.star}}

{{comment.count}} reviews
5 Stars

{{comment.star5}}%

4 Stars

{{comment.star4}}%

3 Stars

{{comment.star3}}%

2 Stars

{{comment.star2}}%

1 Star

{{comment.star1}}%

All Reviews ({{comment.star_num?comment.star_num:comment.count}})

All Reviews

5 stars only

4 stars only

3 stars only

2 stars only

1 star only
Reviews with Pictures ( {{comment.pic_comment}} )
See All Reviews

No data

L***n

Taiwan, Province of China

Verified Purchase

5 .0

2026-06-04

Flawless performance.

100 Helpful vote Comments

D***t

Germany

Verified Purchase

5 .0

2026-04-18

Top notch optics.

9 Helpful vote Comments

N***z

Lithuania

Verified Purchase

4 .0

2026-03-28

Good modules, though it took 4 days longer than expected to clear customs.

17 Helpful vote Comments

N***r

Indonesia

Verified Purchase

4 .0

2026-01-02

Great transceiver, but the shipping box was slightly dented upon arrival

10 Helpful vote Comments

N***r

Russian Federation

Verified Purchase

5 .0

2025-12-15

Very satisfied.

39 Helpful vote Comments

N***z

Finland

Verified Purchase

5 .0

2025-12-12

Excellent value compared to OEM Cisco optics.

31 Helpful vote Comments

P***s

Nepal

Verified Purchase

5 .0

2025-10-07

Just works.

79 Helpful vote Comments

A***n

Indonesia

Verified Purchase

5 .0

2025-09-30

Stable link, zero packet loss over a 8km span.

10 Helpful vote Comments

J***t

Thailand

Verified Purchase

5 .0

2025-09-25

10km link test passed with flying colors on single-mode fiber.

63 Helpful vote Comments

A***s

Macao

Verified Purchase

5 .0

2025-09-05

Good value.

68 Helpful vote Comments

A***e

Hong Kong

Verified Purchase

5 .0

2025-08-17

Using these for our enterprise campus network backbone expansion. :P

44 Helpful vote Comments

T***n

Argentina

Verified Purchase

5 .0

2025-07-18

Our team deployed 50 pieces of LS-BL49551G-10I modules across various outdoor utility poles and temperature-controlled hubs. The industrial operating margin is no joke—survived a recent heatwave without any optical power degradation. Highly recommended for rugged deployments.

8 Helpful vote Comments

N***z

Morocco

Verified Purchase

5 .0

2025-05-14

Solid performance.

25 Helpful vote Comments

K***n

Nepal

Verified Purchase

5 .0

2025-03-25

Needed these for a municipal CCTV fiber run; all 20 units linked up instantly at full 1G duplex without throwing any DDM temperature warnings. Outstanding reliability for mission-critical surveillance links.

34 Helpful vote Comments

R***e

New Zealand

Verified Purchase

5 .0

2025-02-25

Recognized instantly by Mikrotik CRS326, no locking issues.

71 Helpful vote Comments

J***r

Indonesia

Verified Purchase

5 .0

2025-02-11

We compared these Link-PP BiDi SFP modules against our usual tier-1 vendor stock. Not only did they negotiate a fraction of the cost, but the real-time DDM telemetry reporting matches our SNMP monitoring software down to the decimal dBm. Incredible engineering for the price point. :D

61 Helpful vote Comments

L***s

Singapore

Verified Purchase

5 .0

2025-02-11

Works right out of the box with our Cisco switches, zero hassle!

50 Helpful vote Comments

S***n

Republic of Korea

Verified Purchase

5 .0

2025-02-09

Solid industrial build quality, running smoothly in our outdoor cabinet.

26 Helpful vote Comments

J***e

Belarus

Verified Purchase

5 .0

2025-01-28

Running 24/7 for three weeks straight without a single drop or CRC error. Impressive thermal dissipation in our dense core switch setup. Will definitely order another batch for our secondary data center ring!

22 Helpful vote Comments

L***h

Libyan Arab Jamahiriya

Verified Purchase

5 .0

2024-12-19

Perfect match for 1490/1550nm WDM setups.

29 Helpful vote Comments

A***e

Mexico

Verified Purchase

5 .0