High Quality Content by WIKIPEDIA articles! The Cisco 1000 Series Routers are low end branch office router. Available in fixed configurations supporting 10baseT, ISDN and serial interfaces. These routers are no longer supported and are replaced by the Cisco 800 Series routers. Ethernet over twisted pair refers to the use of cables that contain insulated copper wires twisted together in pairs for the physical layer of an Ethernet network—that is, a network in which the Ethernet protocol provides the data link layer. Other Ethernet cable standards use coaxial cable or optical fiber. There are several different standards for this copper-based physical medium. The most widely used are 10BASE-T, 100BASE-TX, and 1000BASE-T, running at 10 Mbit/s (also Mbps or Mbs-1), 100 Mbit/s, and 1000 Mbit/s (1 Gbit/s), respectively.

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