Abstract: A network-info device, said device comprising of: (a) a connection means, enables to connect said device to a transmission media channel of a network or to any other transmission media means of a network including wire, cable, optical fiber and other transmission means and wherein said connection can be done on an existing transmission means or while producing said transmission means or while producing a connection accessories for said transmission means; (b) a memory; and (c) a communication means. The invention additionally relates to a system and a method to manage network information by using said device.