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

Name: FS 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: 217824
Price: 356.9 USD
Availability: InStock
Rating: 5 (40 reviews)

# 217824

Product: FS SFP-25G23-BX40 Compatible LINK-PP 25G SFP28 BiDi 1270nm-TX/1310nm-RX 40km Simplex LC/UPC DOM SMF Optical Transceiver Module
SKU: 217824
P/N: LS-BL273125-40C
Price: $ 415
Stock: 187 in Stock
Sold: 1K
Product URL: https://www.l-p.com/products/494152.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

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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-25G23-BX10 | 10km; SFP-25G23-BX10-I | 10km; SFP-25G32-BX10 | 10km; SFP-25G32-BX10-I | 10km; SFP-25G23-BX20-I | 20km; 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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FS 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.

FS 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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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

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

I***y

United States

Verified Purchase

5 .0

2025-11-07

Deploying 25G infrastructure for a carrier network upgrade requires strict compliance with wireless transport protocols, and we selected these 25G optical modules to handle CPRI Option 10 and eCPRI traffic profiles from BBU to RRH. With a max data rate of 25.78 Gbps, these transceivers handle high-bandwidth wireless fronthaul effortlessly across a 28km stretch. The single-mode fiber architecture combined with the 1270nm-TX/1310nm-RX configuration cut our dark fiber leasing overhead by exactly half across 45 cell sites. Built-in DDM data diagnostics allow to track optical power levels in real time and catching fiber bends before a full outage occurs.

149 Helpful vote Comments

Y***s

United States

Verified Purchase

5 .0

2025-10-05

The digital diagnostic monitoring is super accurate, reporting spot-on Rx/Tx power levels.

65 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

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

K***n

United States

Verified Purchase

5 .0

2025-05-28

Procuring high-quality fiber transceivers in wholesale volume can be risky if compatibility is inconsistent, but after testing baseline samples of these LINK-PP 40km 25G BiDi optics transceivers, we placed a large commercial order. The technical consistency across the entire shipped lot was flawless, arriving in individual anti-static packaging with clear batch tracking labels. Out of all units deployed so far across our network expansion, we have experienced a 0% failure-out-of-box (DOA) rate. Our field technicians love how easily they click into our edge routers, and management appreciates the significant cost reduction.

115 Helpful vote Comments

M***r

Nigeria

Verified Purchase

5 .0

2025-05-18

The sales manager for my order was absolutely wonderful. She contacted me as soon as my order hit to verify all the information was correct for what I needed and answered any questions that I had. Impressed by their working efficiency.

56 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

H***n

United States

Verified Purchase

5 .0

2025-03-23

I found the website easy to navigate and your prices unbeatable. The product arrived post haste, Faster than I expected. Who can ask for any thing more.

51 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

D***s

Taiwan, Province of China

Verified Purchase

5 .0

2025-02-18

Spent almost three days looking for the items. Now I've got it! they are in new condition at a good price.

61 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

I***k

France

Verified Purchase

5 .0

2024-08-31

Unbeatable price. On time delivery. Well done!

47 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

M***n

Sweden

Verified Purchase

5 .0

2024-08-12

LINK-PP is the most user-friendly website I have ever found. It has very knowledgeable staff and offers various good products at a reasonable price. Also, the Fast delivery has helped me save a lot of time.

32 Helpful vote Comments

A***V

Canada

Verified Purchase

5 .0

2024-02-28

Competitive prices. Site is easy to use. Fast shipping.

49 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

F***n

Belgium

Verified Purchase

5 .0

2023-12-04

Putting in the order was super easy and shipping was really quick.

49 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

J***g

India

Verified Purchase

5 .0

2023-07-10

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!

43 Helpful vote Comments

K***m

United States

Verified Purchase

5 .0

2023-06-19

Amazing products, amazing prices and superFast delivery.

50 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

M***z

India

Verified Purchase

5 .0

2023-04-06

A+ Service. Thanks

45 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