★ Introduction
In the evolving landscape of high-performance networks, the push toward higher bandwidths, lower latency, and cost-effective short-reach optical links is stronger than ever. The 25GBASE-SR standard (which supports 25 Gbps over multimode fibre) has become a key enabler for data-centre uplinks, server-to-switch links, and 5G wireless backhaul. By leveraging multimode fibre (MMF) instead of more expensive single-mode fibre for short-distance links, network operators can upgrade to 25G bandwidth with fewer infrastructure changes. The LS-MM8525-S1I from LINK-PP is precisely designed to meet this shift.
★ Product Overview – LS-MM8525-S1I at a Glance
The LS-MM8525-S1I is an SFP28-form-factor optical transceiver module optimized for 25GBASE-SR on MMF. According to LINK-PP’s product listing:
Maximum data rate: 25.78 Gbps.
Wavelength: 850 nm, with a VCSEL transmitter and a PIN receiver.
Target medium: Multimode fibre (MMF), short-reach links (up to 100m) via duplex LC/UPC connector.
Interface: Duplex LC/UPC optical connector.
Form factor: SFP28, supporting hot-plug applications in modern network switches.
Industrial-grade version: Appears listed as “-S1I” variant, offering enhanced environmental tolerance.
★ Technical Specifications – What You Should Know
Below is a breakdown of the main technical parameters (as verified from the product listing):
Form-factor: SFP28 (compatible with 25G network equipment)
Max Data Rate: 25.78 Gbps
Wavelength: 850 nm VCSEL transmitter / PIN photodiode receiver
Media: Multimode Fibre (MMF)
Reach: Up to ~100 m (depending on fibre type) on MMF via duplex LC/UPC.
Connector: Duplex LC/UPC
Operating Conditions: The industrial variant supports an extended temperature range
Standards Compliance: SFP28 MSA, likely IEEE 802.3by (25GBASE-SR), and monitoring via DOM/DDM (based on product summary)
★ Advantages & Use-Case Scenarios
Advantage Highlights
High Bandwidth Short-Reach Link: With 25 Gbps capacity and up to ~100 m reach on multimode fibre, it supports dense deployment inside data centres and aggregation switches.
Cost-Efficient MMF Infrastructure: Many existing data-centre links already use multimode fibre; this module allows an upgrade to 25G without a full fibre-plant overhaul.
Industrial-Grade Robustness: The industrial temperature version means it can be deployed in harsher environments (e.g., outdoor cabinets, telecom equipment rooms).
Short-Reach Application Fit: For short-links (within a rack, between adjacent racks, campus building MMF links), this module hits the sweet spot of performance vs cost.
Typical Use-Case Scenarios
Data Centre Uplink/Server Links: In 25 GbE switch architectures, using multimode fibre for links up to ~100 m is common. The LS-MM8525-S1I fits this scenario well.
Campus or Building Backbone Links: Where multimode fibre already exists between wiring closets or buildings, upgrading to 25GBASE-SR gives a bandwidth boost without replacing fibre.
5G Wireless Backhaul / Aggregation: For mobile-network operator equipment leveraging multimode fibre in short-reach aggregation links, this module serves as a reliable optical interface.
High-Density Optical Infrastructure Upgrades: For service providers or enterprises upgrading from 10G to 25G in existing fibre infrastructure, this module simplifies migration.
★ Deployment & Compatibility Considerations
Ensure MMF Type & Link Length Compatibility: Although the module supports up to ~100 m, actual reach depends on fibre type (OM3, OM4) and link loss budget. Verify existing multimode fibre meets required specifications.
Check Host Device Compatibility: The SFP28 port and firmware of the switch, server, or aggregation equipment must support 25GBASE-SR and be compatible with third-party optics if used.
Maintain Clean Optical Connections: As with any optical module, connector cleanliness, correct insertion, and proper fibre handling are essential for achieving specified performance.
Thermal/Environmental Conditions: For deployments in harsh or outdoor environments, confirm the version supports the required temperature range (the “-S1I” variant suggests industrial grade).
Use the Monitoring Features: If the module supports DDMI (digital diagnostics), use it for optical power, temperature, and bias current monitoring for better reliability and maintenance.
Future-proofing for 25G Infrastructure: As network demand grows, shifting to 25G is becoming standard in many data-centres and enterprise backbone links; investing in 25G-capable optics now ensures a longer lifecycle.
★ Conclusion
For network architects, data-centre operators, and telecom professionals looking to upgrade to 25 Gbps links on existing multimode fibre infrastructure, the LINK-PP LS-MM8525-S1I delivers a compelling combination of performance, cost-effectiveness, and flexibility. Its support for 25GBASE-SR, industrial-grade temperature range, and compatibility with high-density short-reach applications make it a future-ready choice for both enterprise and operator networks.
Upgrade Your Network Today!
Discover the benefits of the LINK-PP LS-MM8525-S1I SFP28 transceiver and enhance your data center's performance.
★ FAQ
How do you install the LINK-PP LS-MM8525-S1I SFP28 transceiver?
You put the module into your switch or router’s SFP28 port. You do not need any tools. The device finds the module right away. Your network connects instantly.
Which devices work with this SFP28 module?
You can use this module with Cisco, Dell, and Arista. It also works with other big brands. It follows SFP28 MSA standards. Your network will work with many devices.
What fiber type should you use for the best results?
You should use OM4 multimode fiber for up to 100 meters. OM3 fiber works for up to 70 meters. Pick OM4 if you want the longest reach and best performance.
Does this transceiver support industrial environments?
You get steady operation from -40°C to 85°C. The module works in tough places. Your network keeps running anywhere.
What certifications does the LINK-PP LS-MM8525-S1I have?
You get ISO 9001, CE, RoHS, FCC, and UKCA certifications. These show the module is safe, high quality, and good for the environment. You can trust your network to meet world standards.
★ See Also
Overview Of LINK-PP 10G SFP+ Transceiver LS-SM5510-80C
Exploring LINK-PP LS-DW2810-40I 10G DWDM Transceiver
Choosing The Best LINK-PP 10G SFP+ Module For You
