Knowledge Base
Optical Networking Guides
Practical guides from our compatibility work: choosing between SFP and SFP+, pairing BiDi modules, matching fiber types, planning reach, and reading DOM diagnostics.
SFP vs SFP+: What's the Difference and When to Use Each
Same cage, different speed class. How SFP and SFP+ differ electrically, where each fits, and whether you can mix them in one switch.
Read the guide →
How BiDi (Single-Fiber) Transceivers Work — and How to Pair Them
BiDi modules send and receive on different wavelengths over one fiber strand. How WDM does it, which wavelength pairs are common, and the installation checklist that prevents down links.
Read the guide →
Single-Mode vs Multimode Fiber: Which Module Do You Need?
Core size, light source and reach class — how to tell single-mode and multimode apart, match the right module, and the jacket colors that give it away.
Read the guide →
SFP Reach and Wavelength Guide: From 100 m to 120 km
Why wavelength and reach go together, a reference table for every standard in our catalog, how to read a module label, and the practical link-budget checks before you order.
Read the guide →
What Are DOM and DDM? Monitoring Your Optical Transceivers
DOM/DDM reads live TX/RX power, temperature and voltage out of every modern transceiver. What the numbers mean, the commands to read them on major platforms, and how to use them for preventive maintenance.
Read the guide →