1.25G CWDM and DWDM SFP: putting more links on the fibre you already own
A gigabit is not a lot of bandwidth in 2026. It is, however, exactly what an enormous amount of real infrastructure runs on: substation telemetry, rail signalling, traffic systems, CCTV backhaul, municipal networks, business access tails, and the thousands of SDH and access shelves that still underpin European telecoms. In those networks the constraint is […]
155M and 1.25G SFPs: the optics that keep utility and industrial networks running
155M and 1.25G SFP modules explained: 100BASE-FX, BX BiDi, CSFP, long-haul optics to 200 km and extended-temperature parts for substations and industry.
CWDM vs DWDM: which one does your network actually need?
You have two sites, one pair of fibres between them, and a lot more traffic than that fibre currently carries. Wavelength division multiplexing is how you get more out of the strands you already have — and the first decision is CWDM or DWDM. They solve the same problem in very different ways. CWDM is […]
