Category 4 cable

Category 4 cable (Cat 4) is a cable that consists of eight copper wires arranged in four unshielded twisted pairs (UTP) supporting signals up to 20 MHz.^[1] It is used in telephone networks which can transmit voice and data up to 16 Mbit/s.^[2]

For a brief period it was used for some Token Ring,^[3] 10BASE-T, and 100BASE-T4 networks, but was quickly superseded by Category 5 cable. It is no longer common or used in new installations and is not recognized by the current version of the ANSI/TIA-568 data cabling standards.

References

^ Spurgeon, Charles E (2000). Ethernet: the definitive guide. O'Reilly. p. 212. ISBN 9781565929524.
^ CCNA: Network Media Types
^ Local Area Network Concepts and Products: LAN Architecture (PDF), IBM, May 1996, archived from the original (PDF) on 2013-06-23

Zdroj:https://en.wikipedia.org?pojem=Category_4_cable
Text je dostupný za podmienok Creative Commons Attribution/Share-Alike License 3.0 Unported; prípadne za ďalších podmienok. Podrobnejšie informácie nájdete na stránke Podmienky použitia.

[1] Spurgeon, Charles E (2000). Ethernet: the definitive guide. O'Reilly. p. 212. ISBN 9781565929524.

[2] CCNA: Network Media Types

[3] Local Area Network Concepts and Products: LAN Architecture (PDF), IBM, May 1996, archived from the original (PDF) on 2013-06-23

[1]

[2]

[3]

v t e Unshielded and shielded twisted pair cabling standards
Categories	Cat 1 Cat 2 Cat 3 Cat 4 Cat 5/5e Cat 6/6a Cat 7/7a Cat 8/8.1/8.2
See also Copper cable certification Ethernet over twisted pair Modular connector TIA/EIA-568 Twisted pair