We are upgrading our campus network and need about 200 pairs. Do you offer B2B bulk pricing for large batch deployments?

Yes, we provide tiered volume discounts for enterprise procurement. For orders over 200 pairs, the price drops significantly, and we offer flexible Net Terms to help manage your IT budget. Please contact our live sales team for a custom quote.

Does this require OS2 single-mode fiber, and what connector type should my patch cords have?

Correct. You will need standard 9/125碌m Single-Mode Fiber (OS1 or OS2) to achieve the 120km maximum transmission distance. Make sure your fiber patch cords are terminated with a Simplex LC connector to match the optical interface of this transceiver.

Will this 1G BiDi SFP work if I mix Cisco Catalyst switches on one end and Juniper on the other?

Absolutely. Our LS-BL55491G-A2C is 100% MSA compliant. As long as you use the complementary 1490nm-TX/1550nm-RX module on the opposite end, it bridges multi-vendor equipment like Cisco, Juniper, Dell, and HPE seamlessly.

Are these optics compliant with standard Gigabit Ethernet and Fibre Channel protocols? I need DOM support for my SNMP monitoring.

Yes! They fully support IEEE Fast/Gigabit Ethernet and 1G Fibre Channel standards. Furthermore, the built-in DDM/DOM functionality provides real-time diagnostic telemetry (such as module temperature, voltage, laser bias, and TX/RX power) directly to your network management systems.

Breadcrumb: Home; Products; Optics Transceivers | SFP Modules; 1/2/4G Transceiver Modules; 1G BiDi SFP; 217832

Click to open expanded view

FS SFP-1G54-BX120 Compatible LINK-PP 1G SFP BiDi 1550nm-TX/1490nm-RX 120km DOM Simplex LC SMF Optical Transceiver Module

Name: FS SFP-1G54-BX120 Compatible LINK-PP 1G SFP BiDi 1550nm-TX/1490nm-RX 120km DOM Simplex LC SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 217832
Price: 24.983 USD
Availability: InStock
Rating: 5 (21 reviews)

# 217832

Product: FS SFP-1G54-BX120 Compatible LINK-PP 1G SFP BiDi 1550nm-TX/1490nm-RX 120km DOM Simplex LC SMF Optical Transceiver Module
SKU: 217832
P/N: LS-BL55491G-A2C
Price: $ 29.05
Stock: 3186 in Stock
Sold: 740
Product URL: https://www.l-p.com/products/495203.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

21 Reviews

4 Questions

Request Stock

740 Sold

$ 29.05

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

Qty (pcs) :

Unit Price :

$ 29.05

100

$ 27.598

1000

$ 26.726

3000

$ 25.855

6000

$ 24.983

Manufacture: LINK-PP

P/N: LS-BL55491G-A2C

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

Compatible P/N:: SFP-1G34-BX10 | 10km; SFP-1G35-BX10 | 10km; SFP-1G43-BX10 | 10km; SFP-1G53-BX10 | 10km; SFP-1G34-BX20 | 20km; SFP-1G35-BX20 | 20km; SFP-1G43-BX20 | 20km; SFP-1G53-BX20 | 20km; SFP-1G34-BX40 | 40km; SFP-1G35-BX40 | 40km; SFP-1G43-BX40 | 40km; SFP-1G53-BX40 | 40km; SFP-1G45-BX80 | 80km; SFP-1G54-BX80 | 80km; SFP-1G45-BX120 | 120km; SFP-1G54-BX120 | 120km; SFP-1G45-BX160 | 160km; SFP-1G45-BX160-I | 160km; SFP-1G54-BX160 | 160km; SFP-1G54-BX160-I | 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

FS SFP-1G54-BX120 Compatible LINK-PP 1G BiDi SFP Specifications

The FS SFP-1G54-BX120 Compatible LINK-PP 1G BiDi SFP specifications deliver genuinely outstanding performance for long-range networking. This commercial-grade optical transceiver operates over a single-mode fiber with a 1.25Gbps data rate. It features a high-performance 1550nm DFB transmitter and a highly sensitive APD receiver, ensuring stable signal integrity across massive industrial network environments.

FS Part Number	SFP-1G54-BX120	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	1.25Gbps
Wavelength	1550nm-TX/1490nm-RX	Max Cable Distance	120km
Connector	Simplex LC	Media	SMF
Transmitter Type	DFB	Receiver Type	APD
TX Power	0 to +5dBm	RX Power	-28 to -1dBm
Receiver Sensitivity	<-32dBm	DOM Support	Yes
Operating Temperature Range	0 to 70°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-BL55491G-A2C.pdf

Questions & Answers
Ask a Question

No data

Q: We are upgrading our campus network and need about 200 pairs. Do you offer B2B bulk pricing for large batch deployments? By A***s on 2026-05-17

A: Yes, we provide tiered volume discounts for enterprise procurement. For orders over 200 pairs, the price drops significantly, and we offer flexible Net Terms to help manage your IT budget. Please contact our live sales team for a custom quote. By admin on 2026-05-17
Q: Does this require OS2 single-mode fiber, and what connector type should my patch cords have? By S***n on 2026-04-01

A: Correct. You will need standard 9/125碌m Single-Mode Fiber (OS1 or OS2) to achieve the 120km maximum transmission distance. Make sure your fiber patch cords are terminated with a Simplex LC connector to match the optical interface of this transceiver. By admin on 2026-04-01
Q: Will this 1G BiDi SFP work if I mix Cisco Catalyst switches on one end and Juniper on the other? By M***l on 2026-03-30

A: Absolutely. Our LS-BL55491G-A2C is 100% MSA compliant. As long as you use the complementary 1490nm-TX/1550nm-RX module on the opposite end, it bridges multi-vendor equipment like Cisco, Juniper, Dell, and HPE seamlessly. By admin on 2026-03-30
Q: Are these optics compliant with standard Gigabit Ethernet and Fibre Channel protocols? I need DOM support for my SNMP monitoring. By S***z on 2026-03-14

A: Yes! They fully support IEEE Fast/Gigabit Ethernet and 1G Fibre Channel standards. Furthermore, the built-in DDM/DOM functionality provides real-time diagnostic telemetry (such as module temperature, voltage, laser bias, and TX/RX power) directly to your network management systems. By admin on 2026-03-15

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

R***a

Italy

Verified Purchase

5 .0

2026-06-01

Reliable 1.25Gbps simplex LC transceivers. (¬‿¬)

38 Helpful vote Comments

P***l

Egypt

Verified Purchase

5 .0

2026-05-04

Replaced failing OEM optics with these 120km units. Rx sensitivity is legitimately impressive.

78 Helpful vote Comments

L***s

Bolivia

Verified Purchase

5 .0

2026-03-20

I ran a light meter test before deploying. The DFB transmitter hits exactly +2dBm. Perfect for bridging our multi-vendor campus network from Netgear to FS. The DOM monitoring is a lifesaver!

152 Helpful vote Comments

J***z

Belgium

Verified Purchase

5 .0

2026-03-14

We needed cost-effective 1G connectivity for regional networks over dark fiber. Using these Simplex LC units cut our fiber strand usage in half. Unbeatable TCO for bulk procurement.

116 Helpful vote Comments

P***a

Australia

Verified Purchase

5 .0

2025-10-02

The 1550nm/1490nm split works magic for fiber shortages. Halved our SMF cable costs!

150 Helpful vote Comments

C***s

Switzerland

Verified Purchase

5 .0

2025-09-07

We use these LINK-PP modules for gigabit fiber channel setups. Totally stable so far.

62 Helpful vote Comments

R***t

Ireland

Verified Purchase

5 .0

2025-07-27

MSA compliant and zero sync issues.

170 Helpful vote Comments

R***s

Italy

Verified Purchase

5 .0

2025-06-17

As a network admin, finding reliable long-haul 1G BiDi SFPs is tough. These pushed 110km on our telecom backhaul with excellent Rx sensitivity. No CRC errors on our Extreme switches.

167 Helpful vote Comments

L***n

Indonesia

Verified Purchase

5 .0

2025-04-10

Great DOM metrics for our campus fiber.

74 Helpful vote Comments

M***a

Tunisia

Verified Purchase

5 .0