الموضوع: [معلومة] : category cables
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قديم 06-24-2010, 12:31 PM   #1
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تاريخ التسجيل: May 2010
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CONF T is a jewel in the roughCONF T is a jewel in the roughCONF T is a jewel in the rough
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افتراضي category cables


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Cat 1: Currently unrecognized by TIA/EIA. Previously used for POTS telephone communications, ISDN and doorbell wiring.


Cat 2: Currently unrecognized by TIA/EIA. Previously was frequently used on 4 Mbit/s token ring networks.


Cat 3: Currently defined in TIA/EIA-568-B, used for data networks using frequencies up to 16 MHz. Historically popular for 10 Mbit/s Ethernet networks.


Cat 4: Currently unrecognized by TIA/EIA. Defined up to 20 MHz, and was frequently used on 16 Mbit/s token ring networks.


Cat 5: Currently unrecognized by TIA/EIA. Defined up to 100 MHz, and was frequently used on 100 Mbit/s Ethernet networks. May be unsuitable for 1000BASE-T gigabit ethernet.


Cat 5e: Currently defined in TIA/EIA-568-B. Defined up to 100 MHz, and is frequently used for both 100 Mbit/s and 1000BASE-T Gigabit Ethernet networks.


Cat 6: Currently defined in TIA/EIA-568-B. Defined up to 250 MHz, more than double category 5 and 5e.
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Cat 6a: Currently defined in ANSI/TIA/EIA-568-B.2-10 and Amendment 1 and 2 of ISO/IEC 11801. Defined up to 500 MHz, double that of category 6. Suitable for 10GBase-T.


Cat 7: Currently defined in ISO/IEC 11801 Class F cabling. Defined up to 600 MHz. This standard specifies four individually-shielded pairs (S/FTP) inside an overall shield.


Cat 7a: Currently defined in Amendment 1 and 2 of ISO/IEC 11801 Class FA cabling. Defined up to 1,000 MHz. Cable constructions is S/FTP.
Cat 8




category cables


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