SNR Signal to Noise Ratio. A US optical fiber network that has become an interface standard for fiber optic transmission data. The difference between wavelengths at which the radiant intensity of illumination is half its peak intensity. A permanent connection between two fiber ends. A router can connect LANs that have different network topologies, such as Ethernet and Token Ring.
Routers choose the best path for a packet, optimizing the network performance.
Stranding The twisting together of bare or insulated wires to form a core surrounded by one or more wrapped layers, used to improve flexibility while maintaining current carrying capacity. Sweep-test Pertaining to cable, the frequency response is verified by generating an rf voltage whose frequency is swept repeatedly through a given frequency range at a rapid constant rate. The cable response is observed on an oscilloscope. Switching equipment Equipment which performs the function of establishing and releasing connections as necessary between two or more circuits, services or communications systems.