Schematic diagram of the correct order of the of wires in RJ45 plug .
EIA/TIA 568A
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EIA/TIA 568B .
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Correctly wired RJ45 plugs on twisted-pair cable
Network sockets in the Ethernet standard 348303 348303 Network sockets.
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Designations of the network cables .
The EIA/TIA standard defines copper cables in several groups for their suitability for information transmission. Most new cable installations are made to CAT 5e or CAT 6 standards.
Category 1 (CAT 1) copper cable: .
Unshielded twisted pair telephone cable (UTP) suitable for analogue voice but not for data transmission.
Category 2 (CAT 2) copper cable: .
Unshielded twisted pair telephone cable (UTP)suitable for digital voice transmission at up to 1 Mbit/s.
Category 3 (CAT 3) copper cable:
Unshielded twisted pair (UTP), or shielded twisted pair (STP), or foiled twisted pair (ScTP) for data transmission up to 16 MHz and bit rates up to 4 Mbit/s. Cabling specification according to ANSI/TIA/EIA-568-B. Popular for former 10 Mbit/s Ethernet networks.
Category 4 (CAT 4) copper cable: .
Unshielded twisted pair (UTP), or shielded twisted pair (STP), or foiled twisted pair (ScTP) for data transmission up to 20 MHz and bit rates up to 16 Mbit/s. Cabling specification according to ANSI/TIA/EIA-568-B. Used in Token Ring 16 Mbit/s networks.
Category 5 (CAT 5) copper cable: .
Unshielded twisted pair (UTP), or shielded twisted pair (STP), or foiled twisted pair (ScTP) for data transmission up to 100 MHz and bit rates up to 1 Gbit/s. Cabling specification according to ANSI/TIA/EIA-568-B in 1991. Used in half-duplex Fast Ethernet 100 Mbit/s, no applications up to 1000Base-T.
Category 5e copper cable (CAT 5e): .
Unshielded twisted pair (UTP) cable, or Shielded twisted pair (STP) or foiled twisted pair (ScTP) for data transmission up to 100 MHz and bit rates up to 1 Gbit/s. Improved parameters related to FEXT, NEXT, attenuation and RL (Return Loss) compared to those of CAT 5. Cabling specification according to ANSI/TIA/EIA-568-B in 1999. Used in full-duplex Fast Ethernet 100 Mbit/s and 1 Gbit/s networks.
Category 6 (CAT 6) copper cable: .
Unshielded twisted pair (UTP), or shielded twisted pair (STP), or foiled twisted pair (ScTP) to carry data up to 250 MHz and bit rates up to 10 Gbit/s. Cabling specification according to ANSI/TIA/EIA-568-B.2-1 in 2002.
Category 7 copper cable (CAT 7):
Shielded twisted pair (STP), or foiled twisted pair (ScTP) for carrying data up to 600 MHz. Class F cabling specification according to ISO/IEC 11801.
- U - unshielded
- F - foil-shielded
- S - shielded with mesh
- SF - foil and mesh shielded
For more information on cables - Telecommunication cable standards .
EIA/TIA 568A
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EIA/TIA 568B .
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Correctly wired RJ45 plugs on twisted-pair cable
Network sockets in the Ethernet standard 348303 348303 Network sockets.
.
.
[ Designations of the network cables .
The EIA/TIA standard defines copper cables in several groups for their suitability for information transmission. Most new cable installations are made to CAT 5e or CAT 6 standards.
Category 1 (CAT 1) copper cable: .
Unshielded twisted pair telephone cable (UTP) suitable for analogue voice but not for data transmission.
Category 2 (CAT 2) copper cable: .
Unshielded twisted pair telephone cable (UTP)suitable for digital voice transmission at up to 1 Mbit/s.
Category 3 (CAT 3) copper cable:
Unshielded twisted pair (UTP), or shielded twisted pair (STP), or foiled twisted pair (ScTP) for data transmission up to 16 MHz and bit rates up to 4 Mbit/s. Cabling specification according to ANSI/TIA/EIA-568-B. Popular for former 10 Mbit/s Ethernet networks.
Category 4 (CAT 4) copper cable: .
Unshielded twisted pair (UTP), or shielded twisted pair (STP), or foiled twisted pair (ScTP) for data transmission up to 20 MHz and bit rates up to 16 Mbit/s. Cabling specification according to ANSI/TIA/EIA-568-B. Used in Token Ring 16 Mbit/s networks.
Category 5 (CAT 5) copper cable: .
Unshielded twisted pair (UTP), or shielded twisted pair (STP), or foiled twisted pair (ScTP) for data transmission up to 100 MHz and bit rates up to 1 Gbit/s. Cabling specification according to ANSI/TIA/EIA-568-B in 1991. Used in half-duplex Fast Ethernet 100 Mbit/s, no applications up to 1000Base-T.
Category 5e copper cable (CAT 5e): .
Unshielded twisted pair (UTP) cable, or Shielded twisted pair (STP) or foiled twisted pair (ScTP) for data transmission up to 100 MHz and bit rates up to 1 Gbit/s. Improved parameters related to FEXT, NEXT, attenuation and RL (Return Loss) compared to those of CAT 5. Cabling specification according to ANSI/TIA/EIA-568-B in 1999. Used in full-duplex Fast Ethernet 100 Mbit/s and 1 Gbit/s networks.
Category 6 (CAT 6) copper cable: .
Unshielded twisted pair (UTP), or shielded twisted pair (STP), or foiled twisted pair (ScTP) to carry data up to 250 MHz and bit rates up to 10 Gbit/s. Cabling specification according to ANSI/TIA/EIA-568-B.2-1 in 2002.
Category 7 copper cable (CAT 7):
Shielded twisted pair (STP), or foiled twisted pair (ScTP) for carrying data up to 600 MHz. Class F cabling specification according to ISO/IEC 11801.
- U - unshielded
- F - foil-shielded
- S - shielded with mesh
- SF - foil and mesh shielded
For more information on cables - Telecommunication cable standards .
