Information About10base-t |
| CATEGORIES ABOUT 10BASE-T | |
| ethernet standards | |
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10BASE-T is an implementation of Ethernet which allows stations to be attached via Twisted Pair Cable . The name ''10BASE-T'' is derived from several aspects of the physical medium. The ''10'' refers to the transmission speed of 10 Mbit/s. The ''BASE'' is short for Baseband . This means only one Ethernet signal is present on the send and/or receive pair. In other words there is no Multiplexing as with Broadband transmissions. The ''T'' comes from Twisted Pair , which is the type of cable that is used. The nominal segment length for a 10Base-T cable is 100 meters, as with 100BASE-T and 1000BASE-T . Unlike earlier Ethernet standards such as 10BASE5 and 10BASE2 , 10BASE-T does not specify the exact type of wiring to be used. This was done in anticipation of using 10BASE-T in existing twisted pair wiring systems that may not conform to any specified wiring standard. Instead, 10BASE-T wiring is specified using a set of ''characteristics'' that a 10BASE-T link segment must conform to. These include Attenuation , Characteristic Impedance , timing Jitter , Propagation Delay , and several types of Noise . Cable testers are widely available to check these parameters to determine if a cable can be used with 10BASE-T. These characteristics are expected to be met by 100 meters of 24 Gauge unshielded twisted pair cable. 10BASE-T uses RJ-45 jacks wired to one of TIA/EIA-568-B 's termination assignments, T568A or T568B. Only the second and third pairs are used (orange and green); though these are wired opposite in the two standards - T568A puts pair two (orange) on pins 3 and 6, pair three (green) on pins 1 and 2; T568B is the reverse. A 10BASE-T hub/switch transmits on pins 1 and 2, and receives on pins 3 and 6, while a 10BASE-T node transmits on pins 3 and 6 and receives on pins 1 and 2. If the wiring standard is identical on both ends the segment is a patch cable suitable for transmission between a hub/switch/patch panel and a node. If the wiring standards are opposite on either end the segment is a crossover cable suitable for connecting a node to a node or a hub/switch to another hub/switch. The termination standards are as follows: 10BASE-T was the first vendor-independent standard implementation of Ethernet on twisted pair wiring. However, it was in fact an evolutionary development from AT&T StarLAN which had both 1 Mbit/s and 10 Mbit/s versions. 10BASE-T is essentially StarLAN-10 with the addition of the link-beat. In the OSI Model , 10BASE-T is at the Physical Layer . Ethernet encompasses both addressing at the Data Link Layer and a number of physical-layer implementations. In this model, 10BASE-T is one of the possible physical layer standards for ethernet-- some others include 10BASE2 , 10BASE5 , and 100BASE-TX . Network Layer protocols, such as IP , do not generally need to know whether they are being hosted on 10BASE-T or not, provided they know that they are being hosted on Ethernet. SEE ALSO |
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