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A category 3 cable. Cat 3 was widely used in computer networking in the early 1990s for 10BASE-T Ethernet and, to a much lesser extent, for 100BaseVG Ethernet, Token Ring and 100BASE-T4. The original Power over Ethernet 802.3af specification supports the use of Cat 3 cable, but the later 802.3at Type 2 high-power variation does not. [8]
The significance of each category or class is the limit values of which the Pass/Fail and frequency ranges are measured: Cat 3 and Class C (no longer used) test and define communication with 16 MHz bandwidth, Cat 5e and Class D with 100 MHz bandwidth, Cat 6 and Class E up to 250 MHz, Cat6A and Class EA up to 500 MHz, Cat7 and Class F up to 600 ...
Cat-3: Runs over four wires (two twisted pairs). A repeater hub or switch sits in the middle and has a port for each node. This is also the configuration used for 100BASE-T. Copper twisted pair cabling, star topology – direct evolution of 1BASE-5. As of 2024, still widely supported. 10BASE-Te: 802.3az-2010 (14) 100 m Cat-5
2 pair cable, while still around, isn't as popular as it once was. Pictures of CAT3 cable can be found on the websites of manufacturers like Commscope/Systimax, General Cable & Superior Essex. As with CAT5E through 7, CAT3 cables can be either Riser or Plenum rated. 64.208.159.230 18:57, 3 March 2011 (UTC)
This list may not reflect recent changes. C. Category 3 cable; Category 4 cable; Category 5 cable; Category 6 cable; Category 7 cable; Category 8 cable; E. EAD socket;
The Category 7 cable standard was ratified in 2002, and primarily introduced to support 10 gigabit Ethernet over 100 m of copper cabling. [2] It contains four twisted copper wire pairs, just like the earlier standards, terminated either with GG45 electrical connectors or with TERA connectors rated for transmission frequencies of up to 600 MHz.