Will high electromagnetic noise near substation transformers corrupt signal quality on this transceiver?

No, the fully shielded metal housing isolates internal circuitry against heavy EMI, maintaining zero-loss frame transmission.

We are deploying 5G fronthaul links between baseband units and cell site routers; does this 25G transceiver module support eCPRI timing?

Yes, it fully supports CPRI and eCPRI protocol standards with the low latency required for 5G mobile backhaul.

We are installing these on cell towers where outdoor cabinets hit 75°C in summer. Will this optic thermal-throttle?

No, this industrial-grade model is rated for -40°C to +85°C and uses hardened components designed to prevent thermal performance drops.

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Cisco SFP-25G-BX40D-I Compatible LINK-PP 25G SFP28 BiDi 1310nm-TX/1270nm-RX 40km Simplex LC/UPC DOM SMF Optical Transceiver Module (Industrial)

Name: Cisco SFP-25G-BX40D-I Compatible LINK-PP 25G SFP28 BiDi 1310nm-TX/1270nm-RX 40km Simplex LC/UPC DOM SMF Optical Transceiver Module (Industrial)
Brand: LINK-PP
SKU: 218387
Price: 368.08 USD
Availability: InStock
Rating: 4.9 (18 reviews)

# 218387

Product: Cisco SFP-25G-BX40D-I Compatible LINK-PP 25G SFP28 BiDi 1310nm-TX/1270nm-RX 40km Simplex LC/UPC DOM SMF Optical Transceiver Module (Industrial)
SKU: 218387
P/N: LS-BL312725-40I
Price: $ 428
Stock: 174 in Stock
Sold: 864
Product URL: https://www.l-p.com/products/494272.htm

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Manufacture: LINK-PP

P/N: LS-BL312725-40I

Compatible:: Cisco; LINK-PP; Arista; Brocade; 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-25G-BX40D-I Compatible LINK-PP 25G SFP28 Specifications

SFP-25G-BX40D-I serves as a robust industrial-grade 25G SFP28 BiDi SMF optical transceiver module, engineered to sustain seamless data transmission across a 40km reach via 1310nm-TX/1270nm-RX wavelengths while enduring extreme thermal environments ranging from -40 to 85°C.

Cisco Part Number	SFP-25G-BX40D-I	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	-40 to 85°C	Protocols	MSA Compliant, CPRI, eCPRI

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Q: Will high electromagnetic noise near substation transformers corrupt signal quality on this transceiver? By D***r on 2026-04-14

A: No, the fully shielded metal housing isolates internal circuitry against heavy EMI, maintaining zero-loss frame transmission. By admin on 2026-04-15
Q: We are deploying 5G fronthaul links between baseband units and cell site routers; does this 25G transceiver module support eCPRI timing? By G***t on 2025-09-16

A: Yes, it fully supports CPRI and eCPRI protocol standards with the low latency required for 5G mobile backhaul. By admin on 2025-09-17
Q: We are installing these on cell towers where outdoor cabinets hit 75°C in summer. Will this optic thermal-throttle? By A***r on 2025-07-20

A: No, this industrial-grade model is rated for -40°C to +85°C and uses hardened components designed to prevent thermal performance drops. By admin on 2025-07-21

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E***r

Brazil

Verified Purchase

5 .0

2026-06-11

Our smart factory needed a high-bandwidth link between two facilities located 32km apart. The heavy machinery nearby creates high electromagnetic interference, but these metal-shielded modules maintained a stable link without frame loss. Even when our cabinet temperatures spiked during summer, the module temperature remained safe. It is built tough for demanding industrial automation setups.

90 Helpful vote Comments

M***s

Thailand

Verified Purchase

5 .0

2026-05-15

Upgraded our storage cluster links to 25G. Using simplex LC single-mode fiber saved us significant cable tray space inside the hot aisle containment cabinets. Thermal dissipation is surprisingly low for an industrial 40km SFP28 optics.

101 Helpful vote Comments

E***t

Finland

Verified Purchase

5 .0

2026-04-27

DOM data reads perfectly in our monitoring dashboard.

40 Helpful vote Comments

E***g

United States

Verified Purchase

5 .0

2026-03-09

Essential hardware for utility substations requiring high-bandwidth real-time telemetry. The metal housing provides good EMI shielding, and the optical links remain stable near high-voltage transformers.

68 Helpful vote Comments

A***y

Netherlands

Verified Purchase

5 .0

2026-01-21

Running these 1310nm-TX/1270nm-RX optical transceivers in unconditioned cabinets through a freezing winter with zero frame drops.

54 Helpful vote Comments

C***n

Germany

Verified Purchase

5 .0

2026-01-13

Swapping out older 10G BiDi modules for these 25G SFP28 units allowed us to upgrade a multi-building university campus network without pulling new cabling. We simply plugged them into existing single-mode fiber runs, adjusted port speeds, and the 34km links came live right away. Standard SNMP tools read the DDM registers cleanly for simple network monitoring. Highly recommended for campus upgrades!

133 Helpful vote Comments

G***d

Canada

Verified Purchase

5 .0

2025-12-16

Operating in northern Canada means our remote pipeline monitoring nodes face harsh winter weather. We installed these industrial-grade SFP28 optics in unheated outdoor enclosures where ambient temperatures drop below -30°C. Power cycling the remote switch proved the module initializes quickly and maintains stable optical output power under freezing conditions. It is tough, dependable physical layer gear for cold climates.

147 Helpful vote Comments

I***d

Poland

Verified Purchase

5 .0

2025-11-28

40km reach is real, zero packet loss. ✅

51 Helpful vote Comments

L***s

Mexico

Verified Purchase

5 .0

2025-11-04

Replacing our traditional dual-fiber setup with this single-fiber BiDi optical module cut our lease costs in half. We paired the 1310TX/1270RX unit with its complementary 1270TX/1310RX transceiver over a 37km single-mode link. The connection was established instantly with minimal latency and high receiver sensitivity. It fully adheres to MSA standards and provides huge value for regional ISP backbones.

104 Helpful vote Comments

A***y

Singapore

Verified Purchase

5 .0

2025-08-23

These transceivers are installed in outdoor traffic control cabinets where thermal dissipation is critical. The -40°C to +85°C operating range gives us peace of mind during summer heatwaves. Zero packet drops recorded.

84 Helpful vote Comments

C***n

Australia

Verified Purchase

5 .0

2025-08-12

Working in remote mining sites where enclosure temperatures fluctuate wildly between daytime heat and nighttime cold. These industrial-grade SFP28 modules have been running 24/7 for three months without optical degradation or heat throttling. Highly recommended for rugged edge deployments.

124 Helpful vote Comments

B***s

Russian Federation

Verified Purchase

5 .0

2025-06-02

Fast shipping, solid packaging.

63 Helpful vote Comments

N***s

Australia

Verified Purchase

5 .0

2025-05-30

Essential SFP28 optics for long-distance link aggregation when spare fiber strands are tight.

65 Helpful vote Comments

A***s

Philippines

Verified Purchase

5 .0

2025-05-03

Modules fit smoothly into our switch cages and the bail latch operates smoothly. DOM telemetry provides accurate voltage and laser bias data. Fits our budget and operational specs nicely.

101 Helpful vote Comments

L***n

Republic of Korea

Verified Purchase

5 .0

2025-04-22

Upgraded our inter-building links from 10G to 25G using these single-mode SFP28 transceivers. The LC simplex interface latched firmly, and transceiver EEPROM provided clean recognition across our switch platforms in the distribution layer. Very reliable physical layer hardware.

117 Helpful vote Comments

V***l

France

Verified Purchase

4 .0

2025-04-07

Great module overall, but shipping took 2 days longer than estimated. Product quality is flawless, just wish delivery was faster. ⏳

19 Helpful vote Comments

J***n

South Africa

Verified Purchase

5 .0

2025-03-21

We tested the LS-BL312725-40I SFP28 module across a 36km single-mode fiber link to verify signal strength. The 1310nm-TX and 1270nm-RX wavelengths provided clean optical power levels with zero signal degradation. The DDM feature gave us accurate real-time readings for temperature and laser power via our SNMP monitoring tool. It is a solid, reliable choice for long-distance 25G link scaling over single-fiber setups.

149 Helpful vote Comments

S***e

Denmark

Verified Purchase

5 .0

2025-03-17

Full 25Gbps line-rate throughput verified across a 32km single-strand SMF link.

107 Helpful vote Comments