Category 4 cable

Category 4 cable (Cat 4) is a cable that consists of four unshielded twisted-pair (UTP) copper wires with a data rate of 16 Mbit/s and performance of up to 20 MHz.

It is used in telephone networks which can transmit voice and data up to 16 Mbit/s.^[1]

For a brief period it was used for some token ring,^[2] 10BASE-T, and 100BASE-T4 networks, but was quickly superseded by Category 5 cable. It is no longer common or used in new installations. Category 4 cable is not recognized by the current version of the TIA/EIA-568 data cabling standards.

References

↑ CCNA: Network Media Types
↑ "Local Area Network Concepts and Products: LAN Architecture", May 1996, IBM.com

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 TIA/EIA-568 Ethernet over twisted pair Modular connector Twisted pair

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