What exact patch cord type do we need to connect two building main distribution frames 22km apart?

You will need a standard duplex LC single-mode fiber OS1 or OS2 patch cable operating at the 1310nm wavelength.

How are these optics packaged to prevent static or dust damage during international transit?

Each transceiver is individually sealed inside an anti-static ESD bag with protective rubber dust caps installed over the LC optical ferrules.

Can we check real-time optical power levels remotely while monitoring cell tower backhaul links?

Yes, the built-in Digital Optical Monitoring (DOM) lets you view live Tx/Rx power and temperature levels directly in your management software.

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Generic SFP-25GERL-31 Compatible LINK-PP 25G SFP28 1310nm 30km Duplex LC/UPC DOM SMF Optical Transceiver Module

Name: Generic SFP-25GERL-31 Compatible LINK-PP 25G SFP28 1310nm 30km Duplex LC/UPC DOM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 218384
Price: 119.97 USD
Availability: InStock
Rating: 4.9 (14 reviews)

# 218384

Product: Generic SFP-25GERL-31 Compatible LINK-PP 25G SFP28 1310nm 30km Duplex LC/UPC DOM SMF Optical Transceiver Module
SKU: 218384
P/N: LS-SM3125-30C
Price: $ 139.5
Stock: 94 in Stock
Sold: 949
Product URL: https://www.l-p.com/products/494355.htm

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Manufacture: LINK-PP

P/N: LS-SM3125-30C

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

Compatible P/N:: SFP-25GLRL-31-I | 2km; SFP-25GLR-31-I | 10km; SFP-25GMLR-31-I | 10km; SFP-25GERL-31 | 30km; SFP-25GERL-31-I | 30km

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Generic SFP-25GERL-31 Compatible LINK-PP 25G SFP28 Specifications

SFP-25GERL-31 is a 25GBASE-ER SFP28 single-mode optical transceiver module that engineered for long-reach data transmission over duplex LC/UPC connections, delivering robust 25Gbps throughput at a 1310nm wavelength across distances up to 30km with integrated Digital Optical Monitoring support.

Generic Part Number	SFP-25GERL-31	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	0°C to +70°C
Protocols	MSA Compliant, CPRI, eCPRI	Warranty	5 Years

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Q: What exact patch cord type do we need to connect two building main distribution frames 22km apart? By L***t on 2026-02-10

A: You will need a standard duplex LC single-mode fiber OS1 or OS2 patch cable operating at the 1310nm wavelength. By admin on 2026-02-11
Q: How are these optics packaged to prevent static or dust damage during international transit? By O***e on 2025-08-08

A: Each transceiver is individually sealed inside an anti-static ESD bag with protective rubber dust caps installed over the LC optical ferrules. By admin on 2025-08-09
Q: Can we check real-time optical power levels remotely while monitoring cell tower backhaul links? By M***g on 2025-03-21

A: Yes, the built-in Digital Optical Monitoring (DOM) lets you view live Tx/Rx power and temperature levels directly in your management software. By admin on 2025-03-22

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B***k

Israel

Verified Purchase

5 .0

2026-05-02

Excellent high-performance alternative for 25km single-mode fiber links without breaking the network budget.

48 Helpful vote Comments

A***n

Malaysia

Verified Purchase

5 .0

2026-03-04

Needed a long-haul 25G SFP28 1310nm optic for a municipal fiber ring. LINK-PP sent pre-coded EEPROM for our enterprise switch platform. Latency is rock bottom and packet drops are non-existent during peak traffic hours. The duplex LC interface clicked cleanly into our patch panel. Excellent enterprise-grade performance for a fraction of list price!

97 Helpful vote Comments

J***s

France

Verified Purchase

4 .0

2026-02-19

The 25G SFP28 modules connected our 23km single-mode fiber line instantly with clean DOM power readings. The only reason for 4 stars is that international customs held the shipment for three extra days to process paperwork. Everything arrived in good shape, but plan for extra buffer time on international shipping!

26 Helpful vote Comments

D***l

Brazil

Verified Purchase

5 .0

2026-01-17

Our team purchased a batch of these 25G SFP28 optics to connect two major campus distribution buildings across a 23km fiber link. Thanks to the custom EEPROM pre-coding, the modules were recognized instantly by our core switches without triggering any port alarms or coding errors. The duplex LC interface clicked firmly into our patch panels with minimal insertion loss. Thermal performance was impressive as well, even under maximum data traffic load. For any enterprise IT department extending single-mode network reach, these transceivers deliver incredible value.

127 Helpful vote Comments

C***e

Russian Federation

Verified Purchase

5 .0

2026-01-09

Solid 1310nm 30km SFP28 module — DOM telemetry reads spot-on in our edge routing hardware.

75 Helpful vote Comments

M***z

India

Verified Purchase

5 .0

2025-12-11

Duplex LC connector locks in tight and DOM stats integrate seamlessly into our SNMP network monitoring tools.

103 Helpful vote Comments

C***n

United Kingdom

Verified Purchase

4 .0

2025-12-04

These 30km SFP28 modules operate perfectly without generating any port compatibility errors on our switches. The shipping carton was a bit flimsy though, so I would suggest using sturdier packaging for bulk orders.

35 Helpful vote Comments

K***s

New Zealand

Verified Purchase

5 .0

2025-11-22

Finding reliable 30km reach SFP28 optics under a commercial temperature rating usually costs a fortune from traditional OEM vendors. Tested the LS-SM3125-30C across our edge routers and aggregation switches. The link was established at full 25Gbps line rate. Really satisfied with the overall build quality and dust cap fittings.

115 Helpful vote Comments

S***r

Singapore

Verified Purchase

5 .0

2025-10-25

Bought a batch of 50 units for server-to-switch leaf-spine connections across our campus facility. The 1310nm SMF transmission handles long fiber spans effortlessly. Mechanical latching mechanism feels sturdy, unlike some flimsy generic alternatives. Digital Optical Monitoring parameters are dead accurate.

125 Helpful vote Comments

D***z

Turkey

Verified Purchase

5 .0

2025-09-30

Recognized immediately across our aggregation switches, perfect duplex LC connection for our campus link!

59 Helpful vote Comments

E***n

Germany

Verified Purchase

5 .0

2025-09-06

We upgraded our high-performance computing cluster links from 10G to these 25G 1310nm SFP28 transceivers to support high-speed data sync across distant sites. Testing showed consistent full line-rate throughput with stable, ultra-low latency across the entire 25km single-mode line. The optics remained surprisingly cool, keeping internal DOM temperatures below 45°C inside dense switch line cards. The duplex LC polish aligns accurately with standard patch cords, ensuring a clean optical path. It’s a rock-solid piece of hardware for high-demand enterprise environments.

151 Helpful vote Comments

M***g

Indonesia

Verified Purchase

5 .0

2025-05-08

Solid packaging with individual antistatic shell protection. The metal latch pull-tab feels heavy-duty and operates smoothly. Pinout and internal PCB soldering look top-notch under inspection. We've had zero link drops over 60 days of continuous traffic monitoring. Excellent value for ISP core networks.

80 Helpful vote Comments

A***s

Mexico

Verified Purchase

5 .0

2025-04-28

We integrated two dozen LS-SM3125-30C transceivers into our new data center expansion to handle heavy inter-rack traffic. Operating over 19km of OS2 fiber, our received optical power remained well within safety margins with a generous 6dB cushion. The SFF-8472 digital diagnostic monitoring allows our automated software to poll accurate optical stats without manual intervention. Replacing our old, expensive OEM optics with these LINK-PP units cut our hardware upgrade costs drastically without sacrificing a single drop of network performance. A fantastic commercial-grade solution!

73 Helpful vote Comments

N***s

Japan

Verified Purchase

5 .0

2025-04-03

Best bang for the buck on long-reach 25G SMF optics; zero dropped packets after 3 weeks of heavy traffic load.

87 Helpful vote Comments