Shielded Twisted Pair - Most Common Twisted-pair Cables

Most Common Twisted-pair Cables

Name Type Bandwidth Applications Notes
Level 1 0.4 MHz Telephone and modem lines Not described in EIA/TIA recommmendations. Unsuitable for modern systems.
Level 2 4 MHz Older terminal systems, e.g. IBM 3270 Not described in EIA/TIA recommmendations. Unsuitable for modern systems.
Cat3 UTP 16 MHz 10BASE-T and 100BASE-T4 Ethernet Described in EIA/TIA-568. Unsuitable for speeds above 16 Mbit/s. Now mainly for telephone cables
Cat4 UTP 20 MHz 16 Mbit/s Token Ring Not commonly used
Cat5 UTP 100 MHz 100BASE-TX & 1000BASE-T Ethernet Common in most current LANs
Cat5e UTP 100 MHz 100BASE-TX & 1000BASE-T Ethernet Enhanced Cat5. Same construction as Cat5, but with better testing standards.
Cat6 UTP 250 MHz 10GBASE-T Ethernet Most commonly installed cable in Finland according to the 2002 standard. SFS-EN 50173-1
Cat6a 500 MHz 10GBASE-T Ethernet ISO/IEC 11801:2002 Amendment 2.
Class F S/FTP 600 MHz Telephone, CCTV, 1000BASE-TX in the same cable. 10GBASE-T Ethernet. Four pairs, S/FTP (shielded pairs, braid-screened cable). Development complete - ISO/IEC 11801 2nd Ed.
Class Fa 1000 MHz Telephone, CATV, 1000BASE-TX in the same cable. 10GBASE-T Ethernet. Four pairs, S/FTP (shielded pairs, braid-screened cable). Development complete - ISO/IEC 11801 2nd Ed. Am. 2.

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