UTP = Twisted Pairs Cable no shild. 
FTP = the same with a sheet of shielding aluminium around the pairs. 
STP = the same as UTP but with a metal braid around the pairs. 
SFTP = have at the same time the sheet of shielding aluminum and the metal braid.

Category Maximum
Application Specifications Comments
6 250 MHz 1000 Base T
5e 100 MHz Same as CAT 5 plus
1000 Base T
TIA/EIA 568-A-5 Developed specifically for
channel support of Gigabit
5 100 MHz 1000 Base T 100 Mbps
TPDDI (ANSI X 319.5)
155 Mbps ATM
TIA/EIA 568-A (CAT 5)
NEMA (Extended Frequency) ANSI/ICEA
Characterized by tightly twisted pairs to reduce crosstalk loss. Plenum versions are expensive due to demanding transmission requirements combined with challanging flame/smoke resistance. Some manufacturers are offering a CMX rated CAT 5 for residences.
4 20 MHz 10 Mbps Ethernet
(IEEE 802.3) 16 Mbps
Token Ring (IEEE 802.5)
TIA/EIA 568-A (CAT 4)
NEMA (Extended Distance) ANSI/ICEA S-90-661
Almost non-existant. So similar to CAT 5 that it is not economical. CAT 5 provides five times the bandwidth for about the same cost.
3 16 MHz 10 Mbps Ethernet (IEEE 802.3) TIA/EIA 568-A (CAT 3)
NEMA (Extended Distance)
ANSI/ICEA S-90-661
Widely used for vioce, especially digital voice, installations in commercial sites. Market trend is to abandon CAT 3 in favor of installing CAT 5 for both data and voice.
2 4MHz IBM Type 3 1.544 Mbps T1
1 Base 5 (IEEE 802.3)
4 Mpbs Token Ring (IEEE 802.5)
IBM Type 3
ANSI/ICEA S-90-661
ANSI/ICEA S-80-576
Requirements based on the IBM cabling systems. Referred to as low-speed data cable.
1 1MHz Baseband Communications.
RS 232
RS 422
ISDN Basic Rate
ANSI/ICEA S-80-576
ANSI/ICEA S-90-661
Conductorized (quad) station wire fits this category. Suitible for low data rate device communications over short distances. Not suitable for data transmission.

Jean Théry

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