We have older top-of-rack switches that require low-power optics — what is the maximum power draw for this transceiver?

The LS-BL312725-40C operates on a standard +3.3V supply and draws under 1.5W of power. This low power draw prevents port thermal throttling in dense switch configurations.

We are mounting switches inside an unconditioned street cabinet for video surveillance backhaul — is this optical module sufficient?

This commercial-grade SFP28 module is rated for 0°C to +70°C case operating temperature inside standard indoor racks or climate-controlled enclosures. If your outdoor cabinets experience freezing winters or extreme heat, we recommend our industrial-grade version (-40°C to +85°C).

We manage a multi-tenant rack environment — can we read real-time laser bias and temperature stats via standard SNMP polling on this optical transceiver?

Yes, the built-in SFF-8472 compliant DDM function lets you monitor optical Rx/Tx power, voltage, laser bias current, and temperature natively via SNMP or CLI.

Can we use these transceivers for 5G mobile fronthaul tower links running eCPRI protocol?

Yes, it fully supports both 25.78Gbps Ethernet (IEEE 802.3cc) and 5G eCPRI / CPRI Option 10 wireless protocols over 40km SMF.

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

Name: Cisco SFP-25GBX-D-40 Compatible LINK-PP 25G SFP28 BiDi 1310nm-TX/1270nm-RX 40km Simplex LC/UPC DOM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 218394
Price: 356.9 USD
Availability: InStock
Rating: 4.9 (29 reviews)

# 218394

Product: Cisco SFP-25GBX-D-40 Compatible LINK-PP 25G SFP28 BiDi 1310nm-TX/1270nm-RX 40km Simplex LC/UPC DOM SMF Optical Transceiver Module
SKU: 218394
P/N: LS-BL312725-40C
Price: $ 415
Stock: 137 in Stock
Sold: 1.1K
Product URL: https://www.l-p.com/products/493445.htm

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Manufacture: LINK-PP

P/N: LS-BL312725-40C

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

Compatible P/N:: SFP-25G-BXD-I | 10km; SFP-25GBX-D-10 | 10km; SFP-25GBX-U-10 | 10km; SFP28-25G-BX-I | 10km; SFP-25G32-BX20-I | 20km; SFP-25GBX-D-20 | 20km; SFP-25GBX-U-20 | 20km; SFP28-25G-BX20-I | 20km; SFP-25G-BX40D-I | 40km; SFP-25G-BX40U-I | 40km; SFP-25G23-BX40 | 40km; SFP-25GBX-D-40 | 40km

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Cisco SFP-25GBX-D-40 Compatible LINK-PP 25G SFP28 Specifications

SFP-25GBX-D-40 operates as a 25G SFP28 BiDi single-mode optical transceiver module, delivering reliable 40km connectivity over 1310nm-TX/1270nm-RX wavelengths within a 0 to 70°C commercial temperature envelope.

Cisco Part Number	SFP-25GBX-D-40	Vendor Name	LINK-PP
Form Factor	SFP28	Max Data Rate	25.78Gbps
Wavelength	1310nm-TX/1270nm-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: We have older top-of-rack switches that require low-power optics — what is the maximum power draw for this transceiver? By N***s on 2026-03-28

A: The LS-BL312725-40C operates on a standard +3.3V supply and draws under 1.5W of power. This low power draw prevents port thermal throttling in dense switch configurations. By admin on 2026-03-29
Q: We are mounting switches inside an unconditioned street cabinet for video surveillance backhaul — is this optical module sufficient? By H***e on 2026-01-09

A: This commercial-grade SFP28 module is rated for 0°C to +70°C case operating temperature inside standard indoor racks or climate-controlled enclosures. If your outdoor cabinets experience freezing winters or extreme heat, we recommend our industrial-grade version (-40°C to +85°C). By admin on 2026-01-10
Q: We manage a multi-tenant rack environment — can we read real-time laser bias and temperature stats via standard SNMP polling on this optical transceiver? By M***y on 2025-06-25

A: Yes, the built-in SFF-8472 compliant DDM function lets you monitor optical Rx/Tx power, voltage, laser bias current, and temperature natively via SNMP or CLI. By admin on 2025-06-26
Q: Can we use these transceivers for 5G mobile fronthaul tower links running eCPRI protocol? By L***r on 2025-04-03

A: Yes, it fully supports both 25.78Gbps Ethernet (IEEE 802.3cc) and 5G eCPRI / CPRI Option 10 wireless protocols over 40km SMF. By admin on 2025-04-04

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H***l

Thailand

Verified Purchase

5 .0

2026-05-04

Power consumption is under 1.5W per module, which keeps our switch thermal budget in check. Solid for high-density 25G deployments.

87 Helpful vote Comments

E***z

Australia

Verified Purchase

5 .0

2026-03-31

DDM temperature and optical Rx power readings are spot on in our monitoring stack.

77 Helpful vote Comments

B***s

United States

Verified Purchase

5 .0

2026-03-18

Overhauled our regional campus backbone using these 25G BiDi SFP28 optics over single-strand LC single-mode fiber. Low power consumption keeps switch chassis heat to a minimum, preserving overall hardware lifespan in compact wiring closets. Optical power diagnostics align precisely with calibrated handheld power meter measurements within a tight tolerance. Compatibility was tested across our switches and passed without any link flaps. A dependable 25G optical transceiver that delivers consistent performance at enterprise scale.

102 Helpful vote Comments

P***a

Netherlands

Verified Purchase

5 .0

2026-02-24

We needed to double our bandwidth over a leased single-strand fiber pair between two nodes 34km apart. The LINK-PP LS-BL312725-40C modules worked instantly on our core datacenter switches. DDM shows optical power well within specs at -6dBm RX.

95 Helpful vote Comments

F***b

Turkey

Verified Purchase

5 .0

2026-01-25

Reliable 25G SFP28 single-mode optical transceiver with LC simplex connector. Low insertion loss and tight wavelength tolerance (1310nm TX / 1270nm RX). Excellent build quality! ✨

84 Helpful vote Comments

N***s

Germany

Verified Purchase

4 .0

2026-01-20

Module synced instantly at 25G full duplex over a 37km single-strand fiber loop. Only minor critique is that the parcel was rerouted through a different regional sorting hub, adding an extra day to total transit time. High-quality hardware overall, will buy again!

20 Helpful vote Comments

A***n

Singapore

Verified Purchase

5 .0

2025-12-28

We integrated 100 units of these 25G BiDi SFP28 modules across remote hub sites for eCPRI base station backhaul. Thermal stability was a primary concern, but even inside street enclosures reaching over 50°C internal temps, the DDM telemetry logged stable laser output without wavelength drift. The 1310nm TX and 1270nm RX optical separation is clean with zero cross-talk on OTDR traces. Low power consumption under 1.5W per optic keeps the switch chassis cool, delivering genuine enterprise-grade reliability for demanding wireless backhaul.

120 Helpful vote Comments

D***d

United States

Verified Purchase

5 .0

2025-12-08

Tested 30 modules on eCPRI base station backhaul with zero dropped packets.

64 Helpful vote Comments

R***t

Poland

Verified Purchase

5 .0

2025-11-17

Ideal solution for CPRI Option 10 base station links. Low power consumption under 1.5W per transceiver keeps switch thermal load manageable in tight distribution frames.

79 Helpful vote Comments

S***t

Indonesia

Verified Purchase

5 .0

2025-10-29

Used these 25G SFP28 BiDi optical modules for data center interconnect links between two buildings 35km apart with excellent performance. The 1.5W power consumption per module keeps our switch thermal budget and cooling requirements manageable. We paired these with opposite-wavelength modules for full duplex communication without issues. DOM monitoring shows stable Tx/Rx power with no drift over 2 months of continuous operation. The simplex LC connector is a huge space saver in our high-density patch panels.

116 Helpful vote Comments

Z***d

India

Verified Purchase

5 .0

2025-09-01

Bought these for our 25G NAS cluster. Single-fiber bidirectional transmission is a lifesaver when you've already maxed out your conduit space. No FEC errors so far after 3 weeks.

78 Helpful vote Comments

j***a

Brunei Darussalam

Verified Purchase

5 .0

2025-07-18

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.

64 Helpful vote Comments

C***n

Ukraine

Verified Purchase

5 .0

2025-06-23

For rural wireless ISP backhaul tower links, single-fiber BiDi modules are a lifesaver when fiber strands are limited. These 1310TX/1270RX 25G BiDi optical modules deliver full 25Gbps full-duplex speed without jitter.

96 Helpful vote Comments

C***t

Japan

Verified Purchase

4 .0

2025-05-20

Great price-to-performance ratio for a 25G SFP28 40km optical module. Compatible with our core routers without any issues. Giving 4 stars because express delivery arrived late in the evening past our facility receiving hours, forcing us to reschedule the night cutover to the next day.

26 Helpful vote Comments

L***r

Israel

Verified Purchase

5 .0

2025-04-16

We deployed 50 of these 25G BiDi modules across our district office network. Compatibility with our enterprise switches was flawless. The DOM monitoring is a nice touch for our NOC team.

105 Helpful vote Comments

K***g

United States

Verified Purchase

5 .0

2025-03-16

Guess what: they worked right away, from the moment I put them in the switch! So I am happy. Happy that the ethernet port are the right ones, happy with you handling my case and happy with LINK-PP as a company with such a great customer care.

76 Helpful vote Comments

D***r

Italy

Verified Purchase

5 .0

2025-03-13

I have never had a problem with ordering from Linkpp

49 Helpful vote Comments

C***m

Norway

Verified Purchase

5 .0

2025-03-04

Deploying 25G SFP28 BiDi 40km optics for 5G fronthaul eCPRI links usually gets expensive. LINK-PP modules gave us enterprise-grade stability at a fraction of standard cost. Zero bit errors recorded after 72 hours of stress test.

111 Helpful vote Comments

J***e

Indonesia

Verified Purchase

5 .0

2024-08-09

I just placed my second order with LINK-PP and have been extremely impressed by the service. Orders are filled quickly and the prices are far better than ordering directly from local stores.

69 Helpful vote Comments

T***S

United States

Verified Purchase

5 .0

2024-05-27

can not wait to receive my items. So far the process has been awesome.

29 Helpful vote Comments

D***g

Republic of Korea

Verified Purchase

4 .0

2024-02-22

Came on time, great customer service with attention to communication. Great supplier!

87 Helpful vote Comments

L***r

United States

Verified Purchase

5 .0

2023-12-16

pleased with the purchase!

55 Helpful vote Comments

S***r

Cameroon

Verified Purchase

5 .0

2023-08-14

I have no problem with this company. They are good people and gave a lot of help to me during the purchase.

43 Helpful vote Comments

G***a

United States

Verified Purchase

5 .0

2023-07-22

Item arrived much quicker than I expected. Thank you.

13 Helpful vote Comments

M***e

Spain

Verified Purchase

5 .0

2023-07-14

I was impressed by how easy it was to order and helpfulness of frontline staff, when I needed to change the delivery address to arrive upstate at a business function.

48 Helpful vote Comments

r***g

Netherlands

Verified Purchase

5 .0

2023-05-26

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.

59 Helpful vote Comments

J***d

United States

Verified Purchase

5 .0

2023-05-07

Item came on time, as described. No issues with the seller.

98 Helpful vote Comments

M***t

Hong Kong

Verified Purchase

5 .0

2022-03-08

The price for 10/25/40G Transceiver Modules is very competitive, in fact better than I've seen elsewhere and the purchase process was flawless. I'd only purchase through l-p.com in the future.

54 Helpful vote Comments

J***p

Norway

Verified Purchase

5 .0

2022-02-07

Great company to do business with. Best prices around, Fast and quality shipping.

28 Helpful vote Comments