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2 1 1 original standard for Ethernet over fiber; uses any optical fiber with up to 4 dB/km attenuation and at least 150 MHz bandwidth; superseded by 10BASE-FL: 10BASE-FL: 802.3j-1993 (CL15/18) largely obsolete Fibre 850 nm: ST FDDI: 2k: 2 1 1 Nodes: 10BASE-FB: 802.3j-1993 (CL15/17) largely obsolete Fibre 850 nm: ST FDDI: 2k: 2 1 1 synchronous ...
Since common Category 5 cable has four pairs, it is possible to use the spare pairs (pins 4–5, 7–8) in 10- and 100-Mbit/s configurations for other purposes. The spare pairs may be used for power over Ethernet (PoE), for two plain old telephone service (POTS) lines, or for a second 10BASE-T or 100BASE-TX connection.
By reducing the original signal rate to 1 ⁄ 4 or 1 ⁄ 2, the link speed drops to 2.5 or 5 Gbit/s, respectively. [5] The spectral bandwidth of the signal is reduced accordingly, lowering the requirements on the cabling, so that 2.5GBASE-T and 5GBASE-T can be deployed at a cable length of up to 100 m on Cat 5e or better cables. [6] [7]
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Generally, layers are named by their specifications: [8] 10, 100, 1000, 10G, ... – the nominal, usable speed at the top of the physical layer (no suffix = megabit/s, G = gigabit/s), excluding line codes but including other physical layer overhead (preamble, SFD, IPG); some WAN PHYs (W) run at slightly reduced bitrates for compatibility reasons; encoded PHY sublayers usually run at higher ...
1/2 c. (100 g.) granulated sugar. 1. large egg. 1 tsp. pure vanilla extract. 3 c. (270 g.) old-fashioned oats. Directions. Arrange racks in upper and lower thirds of oven; preheat to 350°. In a ...
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Each 1000BASE-T network segment is recommended to be a maximum length of 100 meters (330 feet), [5] [a] and must use Category 5 cable or better (including Cat 5e and Cat 6). Autonegotiation is a requirement for using 1000BASE-T [ 6 ] according to Section 28D.5 Extensions required for Clause40 (1000BASE-T) . [ 7 ]