Satin use in ballet. Other uses include interior furnishing fabrics, upholstery, and bed sheets . Originally, during the Middle Ages, satin was made of silk; consequently it was very expensive, used only by the upper classes. Satin became famous in Europe during the twelfth century. The name derives its origin from the Chinese port city of Quanzhou, whose name in (medieval) Arabic was Zayton. During the latter part of the Middle Ages, it was a major shipping port of silk, using the maritime Silk Road to reach Europe. It was mostly used in the Arabian countries. Fabrics created from satin weaves
Dark fibre other commercial reasons. However, dark fibre networks are generally only available in high-population-density areas where fibre has already been laid, as the civil engineering costs of installing fibre to new locations is often prohibitive. For these reasons, dark fibre networks are typically run between data centers and other places with existing fibre infrastructure. Managed dark fibre is a form of wavelength-division multiplexed access to otherwise dark fibre where a pilot signal is beamed into the fibre by the fibre provider for management purposes using a transponder tuned to the assigned wavelength. DWDM systems generally require central management because their closely