.cat
.cat definition - telecom
Pronounced dot cat. The generic Top Level Domain (gTLD) intended to support the Catalan linguistic and cultural community.This agreement is most unusual, as Catalan is spoken by less than 16 million people in the world and understood by less than 21 million. Catalan is the language of Catalonia in Spain, the city of Valencia, the Principality of Andorra, and other isolated cities, regions, and islands in Spain, France, Italy, and that general area of Europe.This domain was created in 2005 under the sponsorship of Fundaci
Cat definition - telecom
A set of structured cabling standards have been developed over time by standards bodies acting in various collaborations. The standards bodies are the American National Standards Institute (ANSI), Electronic Industries Alliance (EIA), Insulated Cable Engineers Association (ICEA), International Electrotechnical Commission (IEC), International Organization for Standardization (ISO), and Telecommunications Industry Association (TIA). EIA/TIA 568A, released in 1985, built on earlier work at AT&T, IBM, and other companies, and set the tone for formally standardization structured wiring standards.That standard subsequently was supplemented and improved as EIA/TIA 568B. It also was internationalized in 1995 as ISO/IEC 11801.The standards are known as Cat 1, Cat 2, Cat 3, Cat 4, Cat 5, Cat 6, and Cat 7, and are progressively more capable due to tighter tolerances on dimensions and different twist pitches. Table C-1 compares the various categories with gauge measurements stated in American Wire Gauge (AWG). See also ANSI, AWG, Cat 1-7, EIA, EIA/TIA-568, ICEA, IEC, ISO, ISO/IEC 11801, TIA, and twist pitch.
Table C-1: Twisted-Pair Categories of Performance
| Cat | AWG | Rating | Typical Applications | Standards |
|---|---|---|---|---|
| Cat 1 | Various | Unspecified; < 1 MHz | POTS, ISDN BRI, RS-232 & RS-422, low-speed data, speaker wire, alarm cable | ANSI/ICEA S-80-576 ANSI/ICEA S-91-661 |
| Cat 2 | 24 gauge | 1 MHz | 4 Mbps Token Ring LANs | ANSI/ICEA S-80-576 |
| Cat 3 | 24 gauge | 16 MHz | POTS, ISDN, T1, 10Base-T LAN | ANSI/ICEA S-91-661 ANSI/ICEA S-101-699 ANSI/TIA/EIA 568 ISO/IEC 11801 |
| Cat 4 | 24 gauge | 20 MHz | 16 Mbps Token Ring LAN | ANSI/TIA/EIA 568 ISO/IEC 11801 |
| Cat 5 | 24 gauge | 100 MHz | 10/100Base-T LAN | ANSI/ICEA S-91-661 ANSI/TIA/EIA 568 ISO/IEC 11801 |
| Cat 5e | 24 gauge | 100+ MHz | 10/100Base-T LAN, 155 Mbps ATM, 1000Base-T (Gigabit Ethernet, or GbE) | ANSI/ICEA S-91-661 ANSI/TIA/EIA 568 ISO/IEC 11801 |
| Cat 6 | 22Â24 gauge | 250 MHz | 1000Base-T | ANSI/TIA/EIA 568 ISO/IEC 11801 |
| Cat 7 | 22Â24 gauge | 600 MHz | 10 GbE | ANSI/TIA/EIA 568 ISO/IEC 11801 |
Webster's New World Telecom Dictionary Copyright © 2008 by Wiley Publishing, Inc., Indianapolis, Indiana.
Used by arrangement with John Wiley & Sons, Inc.
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