Our outdoor cabinets in Canada see temps from -35°C to +70°C. Is this module really rated for that kind of environment?

Yes, the LS-BL273125-40I is an industrial-grade 25G SFP28 BiDi module with a -40 to 85°C operating range. It’s already deployed in similar harsh outdoor telco cabinets.

Do I need to buy a matching module to complete the optical link?

Yes, this 1270nm-TX/1310nm-RX BiDi module must be paired with the complementary 1310nm-TX/1270nm-RX module on the other end.

Will this 1270nm/1310nm BiDi module work over existing OM4 multi-mode fiber patch cables?

No, the LS-BL273125-40I 25G BiDi module requires OS1/OS2 single-mode fiber and will not link up over OM3/OM4 multi-mode fiber.

Can I monitor the internal temperature and optical output of this transceiver in real-time via our SNMP monitoring software?

Yes, the built-in DOM/DDM function sends real-time temperature, voltage, Tx power, and Rx power readings directly to your network management system.

We run 25G CPRI for 5G up to 38km. Is this transceiver good for that?

Yes, it supports 25G Ethernet, CPRI, and eCPRI over 40km SMF. Many customers use it for 5G fronthaul and backhaul.

Breadcrumb: Home; Products; Optics Transceivers | SFP Modules; 10/25/40G/100G Transceiver Modules; 25G SFP28; 219536

Click to open expanded view

Mellanox SFP28-25G-BX40-I Compatible LINK-PP 25G SFP28 BiDi 1270nm-TX/1310nm-RX 40km Simplex LC/UPC DOM SMF Optical Transceiver Module (Industrial)

Name: Mellanox SFP28-25G-BX40-I Compatible LINK-PP 25G SFP28 BiDi 1270nm-TX/1310nm-RX 40km Simplex LC/UPC DOM SMF Optical Transceiver Module (Industrial)
Brand: LINK-PP
SKU: 219536
Price: 368.08 USD
Availability: InStock
Rating: 5 (23 reviews)

# 219536

Product: Mellanox SFP28-25G-BX40-I Compatible LINK-PP 25G SFP28 BiDi 1270nm-TX/1310nm-RX 40km Simplex LC/UPC DOM SMF Optical Transceiver Module (Industrial)
SKU: 219536
P/N: LS-BL273125-40I
Price: $ 428
Stock: 85 in Stock
Sold: 743
Product URL: https://www.l-p.com/products/491604.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

23 Reviews

5 Questions

Request Stock

743 Sold

$ 428

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

Qty (pcs) :

Unit Price :

$ 428

100

$ 406.6

1000

$ 393.76

3000

$ 380.92

6000

$ 368.08

Manufacture: LINK-PP

P/N: LS-BL273125-40I

Compatible:: Cisco; LINK-PP; Arista; Brocade; FS; Generic; HW; Juniper; Mellanox

Compatible P/N:: MMA2L20-BXD-I | 10km; MMA2L20-BXU-I | 10km; SFP28-25G-BX | 10km; SFP-25G23-BX20-I | 20km; SFP-25G32-BX20-I | 20km; SFP28-25G-BX | 20km; SFP28-25G-BX40 | 40km; SFP28-25G-BX40-I | 40km

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

Mellanox SFP28-25G-BX40-I Compatible LINK-PP 25G SFP28 Specifications

SFP28-25G-BX40-I is an industrial-grade 25G SFP28 BiDi single-mode optical transceiver module engineered to sustain long-range 40km data links via a 1270nm-TX/1310nm-RX wavelength split while effortlessly enduring extreme thermal environments from -40°C to 85°C.

Mellanox Part Number	SFP28-25G-BX40-I	Vendor Name	LINK-PP
Form Factor	SFP28	Max Data Rate	25.78Gbps
Wavelength	1270nm-TX/1310nm-RX	Max Cable Distance	40km
Connector	Simplex LC	Media	SMF
Transmitter Type	DFB	Receiver Type	APD
TX Power	-1 to +7dBm	RX Power	-15 to +3dBm
Receiver Sensitivity	＜-19dBm	Receiver Overload	-7dBm
Operating Temperature Range	-40 to 85°C	Protocols	MSA Compliant, CPRI, eCPRI

Videos

Matching Products

Pictures

ID#

Description

Price

Stock

Add to Cart

Download

Questions & Answers
Ask a Question

No data

Q: Our outdoor cabinets in Canada see temps from -35°C to +70°C. Is this module really rated for that kind of environment? By S***e on 2026-05-21

A: Yes, the LS-BL273125-40I is an industrial-grade 25G SFP28 BiDi module with a -40 to 85°C operating range. It’s already deployed in similar harsh outdoor telco cabinets. By admin on 2026-05-22
Q: Do I need to buy a matching module to complete the optical link? By I***n on 2026-02-10

A: Yes, this 1270nm-TX/1310nm-RX BiDi module must be paired with the complementary 1310nm-TX/1270nm-RX module on the other end. By admin on 2026-02-11
Q: Will this 1270nm/1310nm BiDi module work over existing OM4 multi-mode fiber patch cables? By F***e on 2025-12-27

A: No, the LS-BL273125-40I 25G BiDi module requires OS1/OS2 single-mode fiber and will not link up over OM3/OM4 multi-mode fiber. By admin on 2025-12-28
Q: Can I monitor the internal temperature and optical output of this transceiver in real-time via our SNMP monitoring software? By Q***x on 2025-08-29

A: Yes, the built-in DOM/DDM function sends real-time temperature, voltage, Tx power, and Rx power readings directly to your network management system. By admin on 2025-08-30
Q: We run 25G CPRI for 5G up to 38km. Is this transceiver good for that? By B***l on 2025-03-30

A: Yes, it supports 25G Ethernet, CPRI, and eCPRI over 40km SMF. Many customers use it for 5G fronthaul and backhaul. By admin on 2025-03-31

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

J***e

Germany

Verified Purchase

5 .0

2026-05-11

Simplex LC saved our fiber count on long campus backbones.

48 Helpful vote Comments

G***r

Netherlands

Verified Purchase

5 .0

2026-05-04

Tested on our CPRI base station tower link over 32km of fiber runs. The 1270nm-TX and 1310nm-RX optical budget was spot on, receiver APD sensitivity is top notch. Highly recommended for wireless backhaul!

85 Helpful vote Comments

L***h

Indonesia

Verified Purchase

5 .0

2026-04-23

In a 25G dark fiber service offering, we needed modules that could guarantee performance over long distances. The LS-BL273125-40I’s 40km reach and APD receiver make it ideal for this use case. We tested with 25G traffic generators and saw no packet loss or jitter issues. The DOM data is accurate and stable, which helps our operations team monitor the links. Our customers see full 25G performance, and we’ve had zero complaints since deploying these modules.

110 Helpful vote Comments

C***y

Singapore

Verified Purchase

5 .0

2026-04-02

We needed a true industrial 25G SFP28 BiDi for a wind farm SCADA network. These modules run stably in our outdoor enclosures, even during cold nights. The DDM alarms help us detect fiber bends or dirty connectors before they cause outages.

98 Helpful vote Comments

I***e

Canada

Verified Purchase

5 .0

2026-03-15

These modules are perfect for upgrading legacy 10G BiDi routes to 25G without laying new fiber. The 40km SMF distance matches our existing links, and the simplex LC connector is the same. Minimal downtime during migration.

91 Helpful vote Comments

M***d

United States

Verified Purchase

5 .0

2026-02-03

DOM data is accurate, making monitoring 25G links super easy.

52 Helpful vote Comments

L***d

Australia

Verified Purchase

5 .0

2025-12-19

We use these LS-BL273125-40I for 25G base station backhaul. The 40km reach over simplex SMF fits our design perfectly, and the -40~85°C rating handles our rooftop cabinets without issues. The DOM interface shows clean TX/RX power and temperature, which our NOC team loves.

106 Helpful vote Comments

F***d

Spain

Verified Purchase

5 .0

2025-10-08

We use these BiDi SFP28 modules for 25G dark fiber services between two enterprise campuses. Customers see full 25G performance, and our monitoring shows clean optical levels. The 25Gbps rate is exactly what we need for Ethernet and CPRI.

109 Helpful vote Comments

E***t

Republic of Korea

Verified Purchase

5 .0

2025-09-12

We ordered samples first, then scaled to 300+ units. The batch consistency is excellent: TX power, RX sensitivity, and BER are all within tight tolerances. LINK-PP’s testing program gives us confidence in large deployments.

74 Helpful vote Comments

I***n

Brazil

Verified Purchase

5 .0

2025-08-22

1270/1310nm pairing is perfect for our BiDi 40km design.

65 Helpful vote Comments

C***n

Italy

Verified Purchase

5 .0

2025-07-21

For outdoor 25G links, the -40~85°C rating is not just marketing. Our LS-BL273125-40I 25G SFP28 modules see direct sun and freezing nights, and the link stays stable. The sealed enclosure and quality optics make a real difference.

101 Helpful vote Comments

C***s

Japan

Verified Purchase

5 .0

2025-04-18

Industrial temp rating is legit, stable in our outdoor cabinet.

67 Helpful vote Comments

N***d

Norway

Verified Purchase

4 .0

2025-04-07

The DOM data is accurate and the link is stable. My only complaint is that the delivery took a bit longer than expected. Otherwise, the 25G BiDi 40km performance is excellent.

31 Helpful vote Comments

H***n

Russian Federation

Verified Purchase

5 .0

2025-03-26

Upgraded our ISP aggregation backbones from 10G to 25G using existing single LC strands. The speed bump was immediate and latency dropped noticeably. Customer support helped confirm compatibility beforehand too!

117 Helpful vote Comments

N***g

United Kingdom

Verified Purchase

5 .0

2025-03-09

Stable link over single-mode fiber, even in -30°C weather.

77 Helpful vote Comments

K***g

Ukraine

Verified Purchase

5 .0

2024-11-04

Lowest price and items are always in stock.

14 Helpful vote Comments

V***i

Brunei Darussalam

Verified Purchase

5 .0

2024-01-09

I have hesitated to order it because of price(7k), so when I got to know the latest price in the early of Sep, I order one piece to test, all is fine. Link-pp is our first choice.

39 Helpful vote Comments

R***S

Australia

Verified Purchase

5 .0

2023-11-17

This product is used very well.

19 Helpful vote Comments

C***n

Hong Kong

Verified Purchase

5 .0