TITLE

Wiring Faster Ethernet

AUTHOR(S)
Passmore, David
PUB. DATE
August 2005
SOURCE
Business Communications Review;Aug2005, Vol. 35 Issue 8, p16
SOURCE TYPE
Trade Publication
DOC. TYPE
Article
ABSTRACT
This article discusses various issues related to the speed of Ethernet local area networks (LANs). Gigabit Ethernet to the desktop is becoming more common for business enterprises, for many reasons: 10/100/1000 auto-sensing ports are becoming popular on most laptops and many desktops. The manufacturing cost for switches with 1000Base-T Gigabit ports is coming down to that of 10/100 Mbps; it's mostly a matter of including higher-speed application specific integrated circuits. The Cat 5 or Cat 5e twisted pair cabling installed at most sites usually works just fine with 1000Base-T. For inter-switch LAN trunks, the "10X rule" has historically applied; trunks typically have 10X the bandwidth of access LANs, in recent years, the practice has been to run 1-Gbps trunks between desktop switches that offer Fast Ethernet to users. But with 1-Gbps becoming common to the desktop, enterprises are feeling pressured to upgrade trunks to 10-Gigabit Ethernet (10 GbE). But such upgrades haven't happened much since 10 GbE is still quite expensive. Fiber optics are still needed for distances beyond 100 meters, but for horizontal wiring between phone closets and desktops, copper twisted pair will be more than adequate for even unforeseen applications, particularly with its new potential for 10 Gbps bandwidth.
ACCESSION #
17848422

 

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