Course Wavelength Division Multiplexing (CWDM) is a tried and tested technology at adding considerable capacity over a single dark fibre. Our offering comes in 4 different formats to allow customers flexibility in siting the systems, be it in roadside cabinets, telephone exchanges, office server room or data centres. Our passive system enables 4 separate devices to communicate on their own channel via a single fibre up to a distance of 120km in 1Gb/s and 80km in 10Gb/s. This system is essential if adding another fibre is unfeasible.