Will this 1G industrial optic work in standard Cisco switches for an outdoor cabinet?

Absolutely. It is fully MSA compliant and codes perfectly with mainstream gear. The industrial temperature range handles extreme outdoor environments without issues.

Can I check the optical RX levels on this 120km module via CLI?

Yes, it features full DDM/DOM support. You can easily monitor real-time RX and TX power, temperature, and voltage directly through your switch interface.

Do I need a specific SFP for the other end of a 120km fiber run?

Yes, since this is a 1490nm-TX/1550nm-RX BiDi module, you need the matching 1550nm-TX/1490nm-RX counterpart to establish the 1G link over your simplex SMF.

Breadcrumb: Home; Products; Optics Transceivers | SFP Modules; 1/2/4G Transceiver Modules; 1G BiDi SFP; 183235

Click to open expanded view

LINK-PP LS-BL49551G-A2I 1G BiDi SFP 1490nm-TX/1550nm-RX 120km DOM Simplex LC SMF Optical Transceiver Module (Industrial)

Name: LINK-PP LS-BL49551G-A2I 1G BiDi SFP 1490nm-TX/1550nm-RX 120km DOM Simplex LC SMF Optical Transceiver Module (Industrial)
Brand: LINK-PP
SKU: 183235
Price: 27.09 USD
Availability: InStock
Rating: 5 (47 reviews)

# 183235

Product: LINK-PP LS-BL49551G-A2I 1G BiDi SFP 1490nm-TX/1550nm-RX 120km DOM Simplex LC SMF Optical Transceiver Module (Industrial)
SKU: 183235
P/N: LS-BL49551G-A2I
Price: $ 31.5
Stock: 580 in Stock
Sold: 1.4K
Product URL: https://www.l-p.com/products/478220.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

47 Reviews

3 Questions

Request Stock

1.4K Sold

$ 31.5

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

Qty (pcs) :

Unit Price :

$ 31.5

100

$ 29.925

1000

$ 28.98

3000

$ 28.035

6000

$ 27.09

Manufacture: LINK-PP

P/N: LS-BL49551G-A2I

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-A2I 1G BiDi SFP Specifications

The high-capability LINK-PP LS-BL49551G-A2I 1G BiDi transceiver supports stable 1.25 Gbps data transmission over single-mode fiber up to 120 km, using a transmit wavelength of 1490nm and a receive wavelength of 1550nm for dependable long-distance connectivity.

LINK-PP Part Number	LS-BL49551G-A2I	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	1.25Gbps
Wavelength	1490nm-TX/1550nm-RX	Max Cable Distance	120km
Connector	Simplex LC	Media	SMF
Transmitter Type	DFB BiDi	Receiver Type	APD
TX Power	0 to +5dBm	RX Power	-28 to -1dBm
Receiver Sensitivity	<-32dBm	Receiver Overload	-6dBm
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-A2I.pdf

Questions & Answers
Ask a Question

No data

Q: Will this 1G industrial optic work in standard Cisco switches for an outdoor cabinet? By B***r on 2026-05-26

A: Absolutely. It is fully MSA compliant and codes perfectly with mainstream gear. The industrial temperature range handles extreme outdoor environments without issues. By admin on 2026-05-27
Q: Can I check the optical RX levels on this 120km module via CLI? By N***s on 2026-01-07

A: Yes, it features full DDM/DOM support. You can easily monitor real-time RX and TX power, temperature, and voltage directly through your switch interface. By admin on 2026-01-07
Q: Do I need a specific SFP for the other end of a 120km fiber run? By P***n on 2025-10-24

A: Yes, since this is a 1490nm-TX/1550nm-RX BiDi module, you need the matching 1550nm-TX/1490nm-RX counterpart to establish the 1G link over your simplex SMF. By admin on 2025-10-24

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

S***s

Philippines

Verified Purchase

5 .0

2026-06-18

Plug and play Cisco link.

47 Helpful vote Comments

F***z

Bulgaria

Verified Purchase

5 .0

2026-03-01

Works perfectly! :)

97 Helpful vote Comments

A***z

Ireland

Verified Purchase

5 .0

2026-02-20

Nice industrial simplex sfp. =D

15 Helpful vote Comments

M***z

Hungary

Verified Purchase

5 .0

2025-10-25

Tested across HPE and Ubiquiti switches. Negotiated 1000BASE-ZX without any custom commands. =)

39 Helpful vote Comments

B***z

Bulgaria

Verified Purchase

5 .0

2025-09-24

DOM stats look great.

39 Helpful vote Comments

M***s

Finland

Verified Purchase

5 .0

2025-07-30

Bench tested these 120km bidi modules before deploying to our telecom cell towers. SFF-8472 DOM parameters are highly accurate. Wavelength separation of 1490nm and 1550nm is clean with no crosstalk. Flawless OEM compatibility across our entire Arista and Juniper network backbone.

15 Helpful vote Comments

A***e

India

Verified Purchase

5 .0

2025-07-27

Plugged into our outdoor Mikrotik switch. Handles the summer heat well thanks to the industrial -40 to 85C rating. ;)

51 Helpful vote Comments

A***z

Brunei Darussalam

Verified Purchase

5 .0

2025-07-18

Great for outdoor cabinets. :-D

24 Helpful vote Comments

T***k

Argentina

Verified Purchase

5 .0

2025-05-02

The 1490nm-TX 1550nm-RX combo is rock solid. Simplex LC cuts our fiber costs in half for remote campus links.

37 Helpful vote Comments

N***s

New Zealand

Verified Purchase

5 .0

2024-12-12

Fantastic price to performance. OEM 120km SFP modules cost a fortune, but this LINK-PP unit performs just as well for our data center interconnection.

89 Helpful vote Comments

B***n

Germany

Verified Purchase

5 .0

2024-12-05

Used this for a 95km cell tower backhaul upgrade. Link came up instantly on our Juniper gear. Highly recommend this industrial bidi optic.

50 Helpful vote Comments

V***v

Maldives

Verified Purchase

5 .0

2024-09-08

Delivered on time and overall excellent deal with reasonable shipping and great product pricing.

98 Helpful vote Comments

A***s

Argentina

Verified Purchase

5 .0

2024-09-01

MSA compatible out the box.

46 Helpful vote Comments

B***g

Austria

Verified Purchase

5 .0

2024-08-23

Goods as advertised. Shipping great. Recommended!

63 Helpful vote Comments

M***i

Brunei Darussalam

Verified Purchase

5 .0

2024-07-29

My orders came Fast and with a great warranty so I have peace of mind as well.

53 Helpful vote Comments

M***o

Norway

Verified Purchase

5 .0

2024-07-25

What a wonderful shopping experience.

70 Helpful vote Comments

R***t

South Africa

Verified Purchase

5 .0

2024-07-24

The same functionality at a much lower cost, no reason to reject.

37 Helpful vote Comments

D***e

United Arab Emirates

Verified Purchase

5 .0

2024-07-06

We did a batch deployment of 30 units for a rural ISP fiber rollout. Zero DOA. Great 1G bidi sfp module.

73 Helpful vote Comments

R***r

Romania

Verified Purchase

4 .0

2024-07-02

Shipping took an extra week to arrive in Texas, but the 120km bidi sfp itself works flawlessly in our edge router.

72 Helpful vote Comments

O***n

United Kingdom

Verified Purchase

5 .0

2024-06-29

Due to location in China, shipping is somewhat longer than may be expected.

39 Helpful vote Comments

Z***s

Poland

Verified Purchase

5 .0

2024-06-25

Solid 120km SFP module.

52 Helpful vote Comments

O***s

Brazil

Verified Purchase

5 .0

2024-06-24

It saved us from pulling new fiber for a long distance security camera network. Just needed one strand!

15 Helpful vote Comments

B***n

Israel

Verified Purchase

5 .0

2024-06-08

Deployed this LS-BL49551G-A2I for a 110km inter-city campus ring. The optical budget is massive. Paired with 1550nm-TX units, our Cisco core switches showed immediate link state. DOM telemetry confirmed excellent RX sensitivity despite the extreme distance. A professional grade long haul solution.

40 Helpful vote Comments

Y***u

Ireland

Verified Purchase

5 .0

2024-05-31

Great site with awesome prices and Fast shipping.Buy with confidence from Fiberstore.

28 Helpful vote Comments

A***r

Sweden

Verified Purchase

5 .0

2024-05-25

Superb long haul optic.

19 Helpful vote Comments

P***g

Hong Kong

Verified Purchase

5 .0

2024-05-02

Shipping was immediate, and the order arrived quickly and correctly. Thanks a lot!

30 Helpful vote Comments

J***l

Netherlands

Verified Purchase

5 .0

2024-04-24

Hard to find reliable 120km industrial transceivers at this price. Will definitely buy more for our telecom racks. :-)

5 Helpful vote Comments

M***z

Finland

Verified Purchase

5 .0

2024-04-08

I manage unconditioned utility cabinets for a regional ISP. Standard optics fail in winter. This industrial 1G bidi SFP handles freezing temps perfectly. The simplex LC connection easily pushed 1.25Gbps over a 98km single mode fiber run with zero CRC errors over 30 days.

96 Helpful vote Comments

J***n

Thailand

Verified Purchase

5 .0

2024-04-08

We buy 10/25/40G Transceiver Modules's from Link-pp all the time, and they have never let us down.

19 Helpful vote Comments

D***r

Australia

Verified Purchase

5 .0

2024-04-02

These Optical Transceiver Modules worked as advertised.

21 Helpful vote Comments

K***s

Ireland

Verified Purchase

5 .0

2024-03-20

DOM feature is a lifesaver for troubleshooting remote sites. RX power is steady over a 105km SMF run.

51 Helpful vote Comments

I***f

France

Verified Purchase

5 .0

2024-03-13

can't wait to get it

42 Helpful vote Comments

L***s

Bulgaria

Verified Purchase

5 .0

2024-03-03

Replaced a failing commercial grade transceiver with this industrial one. The DFB laser output is very stable. :D

22 Helpful vote Comments

N***i

South Africa

Verified Purchase

5 .0

2024-02-12

Quick! With great quality service and supplies!

43 Helpful vote Comments

O***y

India

Verified Purchase

5 .0

2024-01-18

I needed the sfp cage quickly. Did not want to spend a whole lot of time trying to muddle through a complicated website looking for what I wanted. LINK-PP did just that. Up to this point I did not have a favorite site for my needs. Now I do.

50 Helpful vote Comments

K***n

United States

Verified Purchase

5 .0

2024-01-10

I purchased these 10/25/40G Transceiver Modules because they were less expensive than I found in other places, and order came Fast and quick. Thank You

57 Helpful vote Comments

R***y

Indonesia

Verified Purchase

5 .0

2023-11-25

I wish every business operated like they do. Thanks.

69 Helpful vote Comments

M***o

United States

Verified Purchase

5 .0