Can these modules withstand continuous vibration near railway tracks or heavy industrial machinery?

Yes, the rugged metal alloy casing and latching duplex LC mechanism prevent signal loss caused by physical mechanical vibration.

Will this 25G optics transceiver work on existing multi-mode fiber cabling already pulled in our building?

No, the LS-SM3125-30I is a single-mode SFP transceiver; running it over multi-mode fiber will cause severe optical attenuation and packet loss.

Can we use this 30km SFP28 transceiver for 25G backhaul on remote cell towers with unheated cabinets?

Yes, its industrial-grade rating (-40°C to +85°C) ensures stable laser output even in extreme outdoor weather.

Will high electromagnetic interference in power substations disrupt signal quality over this transceiver?

No, the fully enclosed metal shell provides superior EMI shielding against high-voltage electrical interference.

Breadcrumb: Home; Products; Optics Transceivers | SFP Modules; 10/25/40G/100G Transceiver Modules; 25G SFP28; 218374

Click to open expanded view

Cisco SFP-25G-ER-S-I Compatible LINK-PP 25G SFP28 1310nm 30km Duplex LC/UPC DOM SMF Optical Transceiver Module (Industrial)

Name: Cisco SFP-25G-ER-S-I Compatible LINK-PP 25G SFP28 1310nm 30km Duplex LC/UPC DOM SMF Optical Transceiver Module (Industrial)
Brand: LINK-PP
SKU: 218374
Price: 121.26 USD
Availability: InStock
Rating: 4.9 (13 reviews)

# 218374

Product: Cisco SFP-25G-ER-S-I Compatible LINK-PP 25G SFP28 1310nm 30km Duplex LC/UPC DOM SMF Optical Transceiver Module (Industrial)
SKU: 218374
P/N: LS-SM3125-30I
Price: $ 141
Stock: 135 in Stock
Sold: 864
Product URL: https://www.l-p.com/products/494315.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

13 Reviews

4 Questions

Request Stock

864 Sold

$ 141

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

Qty (pcs) :

Unit Price :

$ 141

100

$ 133.95

1000

$ 129.72

3000

$ 125.49

6000

$ 121.26

Manufacture: LINK-PP

P/N: LS-SM3125-30I

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

Compatible P/N:: SFP-25GLRL-31-I | 2km; SFP-10/25G-LR-I | 10km; SFP-10/25G-LR-S | 10km; SFP-25G-LR-I | 10km; SFP-25G-LR-S | 10km; SFP-25G-ER-S-I | 30km; SFP-25G-iER-S | 30km; SFP-25G-ER-I | 40km; SFP-25G-ER40-S | 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

Cisco SFP-25G-ER-S-I Compatible LINK-PP 25G SFP28 Specifications

Cisco SFP-25G-ER-S-I Compatible LINK-PP module is an industrial-grade 25GBASE-ER SFP28 transceiver featuring a 1310nm EML laser and duplex LC/UPC interface, supporting up to 30km transmission over single-mode fiber with a defined optical power budget and tolerance to chromatic dispersion per ER specifications, alongside integrated DOM for real-time monitoring of Tx/Rx optical power and temperature.

Cisco Part Number	SFP-25G-ER-S-I	Vendor Name	LINK-PP
Form Factor	SFP28	Max Data Rate	25.78Gbps
Wavelength	1310nm	Max Cable Distance	30km
Connector	Duplex LC	Media	SMF
Transmitter Type	EML	Receiver Type	APD
Receiver Sensitivity	-19dBm	Operating Temperature range	-40°C to +85°C
Protocols	MSA Compliant, CPRI, eCPRI	Warranty	5 Years

Videos

Matching Products

Pictures

ID#

Description

Price

Stock

Add to Cart

Download

Questions & Answers
Ask a Question

No data

Q: Can these modules withstand continuous vibration near railway tracks or heavy industrial machinery? By J***r on 2026-03-01

A: Yes, the rugged metal alloy casing and latching duplex LC mechanism prevent signal loss caused by physical mechanical vibration. By admin on 2026-03-02
Q: Will this 25G optics transceiver work on existing multi-mode fiber cabling already pulled in our building? By E***s on 2026-01-26

A: No, the LS-SM3125-30I is a single-mode SFP transceiver; running it over multi-mode fiber will cause severe optical attenuation and packet loss. By admin on 2026-01-27
Q: Can we use this 30km SFP28 transceiver for 25G backhaul on remote cell towers with unheated cabinets? By M***e on 2025-11-13

A: Yes, its industrial-grade rating (-40°C to +85°C) ensures stable laser output even in extreme outdoor weather. By admin on 2025-11-14
Q: Will high electromagnetic interference in power substations disrupt signal quality over this transceiver? By S***d on 2025-04-17

A: No, the fully enclosed metal shell provides superior EMI shielding against high-voltage electrical interference. By admin on 2025-04-18

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

M***z

Spain

Verified Purchase

5 .0

2026-05-11

Used these 25G 1310nm optical modules to connect our primary data center to a disaster recovery site 16 miles away. Latency is rock solid, and DDM monitoring integrates smoothly with our NMS dashboard via SNMP. Enterprise-grade performance at a fraction of standard vendor pricing!

68 Helpful vote Comments

J***a

France

Verified Purchase

5 .0

2026-04-08

Flawless EEPROM coding and zero vendor lock warnings. Will definitely reorder!

89 Helpful vote Comments

S***n

Sweden

Verified Purchase

5 .0

2026-03-29

Great value for 25G SFP28 optical modules. The metal enclosure feels durable and dissipates heat very effectively. Deployed on our edge routers for a 5G front-haul pilot project. Very satisfied with overall optical reliability!

93 Helpful vote Comments

L***s

Canada

Verified Purchase

5 .0

2026-01-22

We deployed 20 of these LINK-PP LS-SM3125-30I SFP28 transceivers for an inter-building fiber trunk over 22km. The EEPROM came properly pre-coded for our enterprise switches, and the link locked at 25Gbps immediately without needing to force port speeds. Very impressed with the hardware build quality!

91 Helpful vote Comments

B***z

Italy

Verified Purchase

5 .0

2025-12-30

Purchased a batch of 50 for our regional metro ring backhaul. Compatibility across our main distribution routers was 100% plug-and-play. The duplex LC connector latches firmly with a solid tactile click. Will definitely keep ordering from LINK-PP.

82 Helpful vote Comments

C***z

Finland

Verified Purchase

4 .0

2025-11-01

Excellent 25G SFP28 1310nm optical modules. Tested over 28km of OS2 single-mode fiber with a perfect optical power budget. Docked one star because local customs clearance in Finland took 3 days longer than estimated. Customer support provided tracking updates quickly though. Stellar hardware!

29 Helpful vote Comments

R***s

Norway

Verified Purchase

5 .0

2025-10-07

Solid performance for campus aggregation switches. Tested compatibility across multiple switch platforms in our lab, and the DOM features work accurately. Will be adopting these as our standard 25G 30km SFP optics across all regional sites.

114 Helpful vote Comments

S***n

Germany

Verified Purchase

5 .0

2025-08-02

Deploying an enterprise data center interconnect link between our two regional facilities over a 27km dark fiber ring required reliable long-reach optics. We inserted these LINK-PP 25G SFP28 30km modules into our aggregate switch chassis, and the pre-coded EEPROM enabled immediate recognition as a native 25GBASE-ER equivalent transceiver. Over a 72-hour PRBS31 stress test under full line-rate traffic, internal temperatures stabilized nicely inside our uncooled edge racks. Real-time DDM optical monitoring via SNMP integrated seamlessly into our NMS dashboard, showing zero CRC errors, zero packet drops, and steady receiver power levels throughout the trial.

143 Helpful vote Comments

E***z

Netherlands

Verified Purchase

5 .0

2025-07-03

Installed on our top-of-rack 25G switches. Absolutely no vendor lock warnings thrown! Standard duplex LC single-mode fiber patch cords fit snugly. Signal attenuation over 24km of OS2 SMF was minimal. Highly recommended long-reach optics.

97 Helpful vote Comments

J***r

Finland

Verified Purchase

5 .0

2025-05-24

Connecting rural wireless towers back to our primary fiber point of presence required a high-capacity 25G optical link over 26km of leased dark fiber. Initial concerns regarding optical loss over nearly 30km were completely dispelled during turn-up testing. The high-sensitivity APD receiver paired with the EML laser provided an effective link budget that easily handled our span loss. The link negotiated at full 25G speed instantly on our edge routers, and we have logged zero link flaps or optical power alarms over 90 days of continuous operation.

139 Helpful vote Comments

P***n

United States

Verified Purchase

5 .0

2025-04-19

Excellent 25G SFP28 optic working flawlessly across our aggregate nodes. Great value.

75 Helpful vote Comments

T***n

Poland

Verified Purchase

5 .0

2025-03-25

Deploying 25GbE backhaul trunks across electric utility substations requires strict immunity to electrical noise and wide thermal fluctuations. We installed these 25G SFP28 1310nm modules inside ruggedized industrial switches inside high-voltage substations. The durable metal enclosure provides superb EMI shielding, while operational testing across a 22km fiber loop yielded extremely clean optical eye diagrams with minimal jitter. The DDM diagnostic interface mapped directly into our SCADA monitoring system via SNMP traps, giving us instant visibility into subtle changes in optical attenuation for critical utility infrastructure.

150 Helpful vote Comments

J***r

United Kingdom

Verified Purchase

5 .0

2025-03-12

Clean optical power output, zero dropped frames after a 72-hour burn-in test.

84 Helpful vote Comments