Dark fiber is a service, where the clients receive an optic fiber (Single mode) to the infrastructure of NET IS SAT and they are given the opportunity to use their own or rented active devices in the both ends of the line.
NET IS SAT has its own optic infrastructure on the territory of the town of Sofia, built in accordance with the world standards. The network is completely backed up by the means of an inner and an outer ring that guarantee an alternative route for the data stream in case of dropping out of the connectivity and they provide 99.75% availability of the services. Strategical optical nodes are additionally backed up with direct routes and high quality equipment DRAKA and CISCO is used. Constant supervision of the network is provided.