Does this module support bidirectional communication over multi-mode fiber infrastructure?

No, this long-haul 40km SFP28 transceiver is strictly engineered and calibrated for single-mode fiber installations only.

Is this LS-BL273125-40C SFP28 module rated for harsh outdoor unconditioned node deployments?

This 25G transceiver module is rated for commercial operating temperatures (0°C to 70°C). If you want to deploy the module in unconditioned outdoor environments, you can select our industrial-grade LS-BL273125-40I module with a wide temperature range (-40°C to 85°C).

What is the typical power consumption of this 40km 25G SFP28 module under maximum data center traffic loads?

The LS-BL273125-40C BiDi optical module is engineered for high energy efficiency, operating comfortably with a low power consumption profile of less than 1.5W per unit.

Can I use this LS-BL273125-40C optical module on both ends of a single fiber link?

No, BiDi modules must always be deployed in complementary pairs. You must pair this Side A module (Tx1270nm/Rx1310nm) with a Side B module (Tx1310nm/Rx1270nm) at the remote end.

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Generic SFP-25G23-BX40 Compatible LINK-PP 25G SFP28 BiDi 1270nm-TX/1310nm-RX 40km Simplex LC/UPC DOM SMF Optical Transceiver Module

Name: Generic SFP-25G23-BX40 Compatible LINK-PP 25G SFP28 BiDi 1270nm-TX/1310nm-RX 40km Simplex LC/UPC DOM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 217823
Price: 356.9 USD
Availability: InStock
Rating: 5 (37 reviews)

# 217823

Product: Generic SFP-25G23-BX40 Compatible LINK-PP 25G SFP28 BiDi 1270nm-TX/1310nm-RX 40km Simplex LC/UPC DOM SMF Optical Transceiver Module
SKU: 217823
P/N: LS-BL273125-40C
Price: $ 415
Stock: 195 in Stock
Sold: 881
Product URL: https://www.l-p.com/products/494411.htm

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Manufacture: LINK-PP

P/N: LS-BL273125-40C

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

Compatible P/N:: SFP-25G32-BX20-I | 20km; SFP-25G23-BX40 | 40km; SFP-25G23-BX40-I | 40km; SFP-25G32-BX40 | 40km; SFP-25G32-BX40-I | 40km

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Generic SFP-25G23-BX40 Compatible LINK-PP 25G SFP28 Specifications

SFP-25G23-BX40 is a hot-pluggable 25G SFP28 BiDi optical transceiver engineered for long-reach data transmission over single-mode fiber up to 40km, integrating a 1270nm DFB transmitter and a 1310nm APD receiver with built-in Digital Diagnostic Monitoring (DDM) to ensure deterministic signal integrity across a commercial operating temperature range of 0 to 70°C.

Generic Part Number	SFP-25G23-BX40	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	0 to 70°C	Protocols	MSA Compliant, CPRI, eCPRI

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Q: Does this module support bidirectional communication over multi-mode fiber infrastructure? By D***t on 2026-04-11

A: No, this long-haul 40km SFP28 transceiver is strictly engineered and calibrated for single-mode fiber installations only. By admin on 2026-04-12
Q: Is this LS-BL273125-40C SFP28 module rated for harsh outdoor unconditioned node deployments? By B***n on 2026-02-07

A: This 25G transceiver module is rated for commercial operating temperatures (0°C to 70°C). If you want to deploy the module in unconditioned outdoor environments, you can select our industrial-grade LS-BL273125-40I module with a wide temperature range (-40°C to 85°C). By admin on 2026-02-08
Q: What is the typical power consumption of this 40km 25G SFP28 module under maximum data center traffic loads? By A***h on 2025-07-21

A: The LS-BL273125-40C BiDi optical module is engineered for high energy efficiency, operating comfortably with a low power consumption profile of less than 1.5W per unit. By admin on 2025-07-22
Q: Can I use this LS-BL273125-40C optical module on both ends of a single fiber link? By C***k on 2025-05-02

A: No, BiDi modules must always be deployed in complementary pairs. You must pair this Side A module (Tx1270nm/Rx1310nm) with a Side B module (Tx1310nm/Rx1270nm) at the remote end. By admin on 2025-05-03

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E***d

United States

Verified Purchase

5 .0

2026-04-17

Perfect fit for enterprise core switch cluster! Using these BiDi optical modules in our corporate HQ server room to interconnect two main switch stacks across buildings. The simplex LC fiber connector snaps in tight with no mechanical play. SFF-8472 compliance ensures full telemetry reporting into our network monitoring software. Zero CRC errors recorded so far.

100 Helpful vote Comments

B***n

United States

Verified Purchase

5 .0

2026-03-16

Leasing dark fiber in metropolitan areas is incredibly expensive, so when our business needed to triple its data replication throughput between data centers, renting another fiber pair was cost-prohibitive. Deploying this BiDi single-mode SFP module allowed us to achieve 25Gbps bidirectional speeds over our existing single leased strand. The digital diagnostic monitoring (DDM) proved invaluable during staging, instantly showing us that our patch cord had a speck of dust causing high insertion loss. Once cleaned, RX power stabilized perfectly at -12dBm over our 31km link. (•‿•)✌️

127 Helpful vote Comments

J***n

United States

Verified Purchase

5 .0

2026-02-03

We completed a regional fiber loop expansion across three municipal buildings using single-strand single-mode fiber where our longest link spans approximately 34.6km with multiple old fusion splices. Thanks to the high-performance APD receiver design on these 25G SFP28 BiDi optical modules, the link maintained a solid lock without a single flap or frame drop under heavy load. The optical power budget is robust enough to easily handle real-world fiber attenuation and insertion loss. Total power consumption remained under 1.5W per module, keeping our edge switch stacks running cool in secondary distribution frames.

128 Helpful vote Comments

B***e

United States

Verified Purchase

5 .0

2025-12-19

Using these modules for a suburban base station backhaul deployment over a 28km stretch. The 25G BiDi SFP28 40km link budget leaves plenty of margin for splices and patch panels. Latency is virtually non-existent, fully matching eCPRI protocol specifications. Will definitely order more bulk batches for our phase 2 network rollout next quarter.

44 Helpful vote Comments

D***y

United States

Verified Purchase

4 .0

2025-10-17

Always remember to order the matching opposite wavelength pair! The LS-BL273125-40C works perfectly as the upstream Side A (1270nm-TX/1310nm-RX). Make sure you don't forget to purchase the matching companion module (Side B: 1310nm-TX/1270nm-RX) for the remote end of the fiber link, otherwise your link won't establish! Wish there was a clear reminder bundle checkbox on the main checkout page. Optics are top tier though.

23 Helpful vote Comments

B***m

Ukraine

Verified Purchase

5 .0

2025-10-14

I had a great experience at l-p.com. They offer incredible Sfp Cage with an unbeatable price. Would recommend to anyone!

109 Helpful vote Comments

H***n

United States

Verified Purchase

5 .0

2025-09-21

Great value for high-density network deployments. Procured 50 pieces for our regional cloud node deployment. The price-to-performance ratio wipes the floor with original vendor pricing. Having a hot-swappable SFP28 form factor means zero downtime maintenance during our ongoing line expansions. These are truly outstanding transceiver modules.

116 Helpful vote Comments

B***v

Norway

Verified Purchase

5 .0

2025-09-05

Yes you can get this item for much cheaper elsewhere but who knows what kind of quality you\'re gonna be getting. And replacing that part and dealing network problems from low quality parts will cost you much more in the long run.

66 Helpful vote Comments

A***y

United States

Verified Purchase

5 .0

2025-08-14

We managed to consolidate our sprawling multi-building university network core by migrating our primary backbone links to these 25G single-fiber bidirectional transceivers. By upgrading from older 10G duplex setups to 25G BiDi on a single strand, we effectively reclaimed dozens of dark single-mode fiber pairs to use for an isolated research network. The 1270nm-TX and 1310nm-RX channel grouping provides an incredibly clean signal isolation over our 32km intramural spans with zero cross-talk detected during peak student traffic hours. The premium build quality of the pull-tab release latch makes hot-swapping incredibly reliable.

148 Helpful vote Comments

F***k

United States

Verified Purchase

5 .0

2025-07-18

Drastically cut down our fiber patch panel footprint. If you are running out of rack space and fiber trays, go BiDi. These single-fiber 25G SFP28 transceivers helped us consolidate our high-density patch panels. We freed up half our fiber ports for future expansion while instantly tripling our transmission speed from 10G SFP+. Absolute game-changer for colocation facilities!

133 Helpful vote Comments

A***h

United States

Verified Purchase

5 .0

2025-06-29

We purchased 25 pairs of these BiDi optical modules to upgrade our campus backbone from 10G to 25G Ethernet. Running these over existing single-mode fiber infrastructure was an absolute breeze. The single LC optical port saved us massive fiber patching headaches. Low power consumption is definitely a plus for our cramped wiring closets. Very satisfied with LINK-PP product!

71 Helpful vote Comments

R***w

Iran, Islamic Republic of

Verified Purchase

5 .0

2025-06-26

LINK-PP has been reliable with good products, good prices and Fast delivery. Never have any trouble with any purchases from LINK-PP.

49 Helpful vote Comments

J***e

Iran, Islamic Republic of

Verified Purchase

5 .0

2025-06-01

All items appeared to be wrapped at point of ship, and were received in good condition. Pricing and delivery were very competeitive.

62 Helpful vote Comments

C***s

United States

Verified Purchase

5 .0

2025-04-27

Great price, great product!

44 Helpful vote Comments

W***r

United States

Verified Purchase

5 .0

2025-04-08

Zero issues on a 35km long-haul link. Exactly what we needed for our regional data center interconnects. The 1270nm-TX/1310nm-RX pair is flawless.

42 Helpful vote Comments

I***n

Hong Kong

Verified Purchase

5 .0

2025-04-03

It is very early going, but they seem to work flawlessly with Dell switches.

89 Helpful vote Comments

C***p

United States

Verified Purchase

5 .0

2025-03-22

Excellent optical power budget and low attenuation! Tested on an optical time-domain reflectometer (OTDR) before live deployment. The laser output on 1270nm is remarkably stable. Over a 32km span with three patch panels, we still have about 4dB of operating margin left. The APD receiver sensitivity on these 25G SFP28 BiDi modules is top-tier.

87 Helpful vote Comments

J***l

Taiwan, Province of China

Verified Purchase

5 .0

2025-01-07

My contact with LINK-PP involved more than just a few clicks and a purchase for 1000Base-T Optical Transceiver Module. I had to make a return for no fault of the Company and they were helpful and courteous throughout the process. I am quite pleased.

79 Helpful vote Comments

L***a

Japan

Verified Purchase

5 .0

2024-10-04

I wish every business operated like they do. Thanks.

49 Helpful vote Comments

G***y

Belgium

Verified Purchase

5 .0

2024-09-23

So far its been a great buying experience. Best price for my item and easy check out.

41 Helpful vote Comments

V***i

United States

Verified Purchase

5 .0

2024-08-14

Always good experience at l-p.com. If not have to pay shipping fee, would be better.

66 Helpful vote Comments

Y***g

United States

Verified Purchase

5 .0

2024-07-28

I bought the 10/25/40G Transceiver Modules at a great price from this company.

43 Helpful vote Comments

M***a

United States

Verified Purchase

5 .0

2024-02-08

I had an exceptional experience working with l-p.com. The Product was delivered very Fast and works like a charm.

83 Helpful vote Comments

S***i

Taiwan, Province of China

Verified Purchase

5 .0

2024-01-01

Workable!! We purchased from LINK-PP mainly due to the competitive price if compared to others. We will look for next purchase for our own support team and for our customers.

50 Helpful vote Comments

A***u

United States

Verified Purchase

5 .0

2023-10-09

Fast delivery, wide selection of goods

48 Helpful vote Comments

F***n

Russian Federation

Verified Purchase

5 .0

2023-10-03

Fast shipping, excellent packaging, insanely prompt customer service.

21 Helpful vote Comments

J***M

Belgium

Verified Purchase

5 .0

2023-08-16

I worried about the quality at the begining. I used it soon after it came, just out of my expectation, quality is great!

97 Helpful vote Comments

D***n

Belgium

Verified Purchase

5 .0

2023-08-01

Delivery is always very quick and not once have I had a problem with the packaging.

52 Helpful vote Comments

R***D

France

Verified Purchase

5 .0

2023-05-22

Is great i have the product and works perfectly i am satisfied with the product the deliver was very well

88 Helpful vote Comments

P***u

United States

Verified Purchase

5 .0

2023-05-12

Working like advertised, very cost-effective!

48 Helpful vote Comments

C***a

Spain

Verified Purchase

5 .0

2023-03-15

One of my friends think highly of LINK-PP, so I thought I may have a try. I am very pleased with the service I received and the products are fantastic with a really cheap price. Also, my order arrived in a very timely manner. Great!

16 Helpful vote Comments

E***l

Brazil

Verified Purchase

5 .0

2023-03-12

Lan Transformer and Sfp Cage works fine as described. Its good performance deserves such a high price.

91 Helpful vote Comments

G***y

United Arab Emirates

Verified Purchase

5 .0

2023-02-28

The order arrived within estimated time

50 Helpful vote Comments

Y***n

Thailand

Verified Purchase

5 .0

2022-11-24

The ordering process was quick and easy, and I received my Transceiver Modules in just a few days. It was well made and worked with no issues!

42 Helpful vote Comments

R***h

Argentina

Verified Purchase

5 .0

2022-08-12

Very prompt, well packaged and very reasonably priced. A great service!

46 Helpful vote Comments

B***d

United States

Verified Purchase

5 .0

2022-05-28

Second time to order this Sfp Cage, used them to replace our previous one, work well and we are happy with them. I will have a look for the other products and see if we can get some also.

50 Helpful vote Comments

P***e

Cambodia

Verified Purchase

5 .0

2022-03-06

I had a great experience at l-p.com. They offer incredible Sfp Cage with an unbeatable price. Would recommend to anyone!

42 Helpful vote Comments