#25g

What’s an SFP Module? The Core Upgrade

The SFP module is the small, hot-pluggable interface that transforms your switch’s electrical data into optical light for fiber transmission. It's the engine of your fiber link.

SFP: 1G speed. The OG.

SFP+: 10G speed. The current standard for distribution layers.

SFP28: 25G speed. The future, and the key building block for 100G networks.

⚠️ 5 Things That Determine IF Your Link Works

Before you hit "buy" on your next SFP Module, check these non-negotiables:

Speed Match: Your module speed (e.g., 25G SFP28) MUST match the port speed. No mixing.

Fiber Type: Match your fiber (MMF or SMF) to the module (SR or LR). MMF uses 850nm; SMF uses 1310nm/1550nm.

Distance: Need 40km+? You require specialized ER/ZR modules.

Temperature: Running equipment outdoors or in a harsh environment? You need Industrial Grade SFP modules.

DDM Support: Ensure the module has Digital Diagnostics Monitoring so you can check power levels and temperature in real-time.

🔓 The OEM Compatibility Trap (Read This First)

Did you know many switches use a digital key inside the SFP module to approve it?

This key is called the EEPROM code. If your module doesn't have the specific code for your switch brand (Cisco, Juniper, etc.), the port can be disabled or restricted. This is called Vendor Lock-In.

The Smart Solution: High-quality third-party vendors, like PHILISUN, pre-code their SFP modules with the correct digital signature, offering seamless compatibility and helping you save significant capital expenditure (CapEx) without compromising performance.

Don't pay double just for a brand name. Get the same performance guarantee with PHILISUN's pre-coded SFP Modules.