Article View: sci.electronics
Article #4625Re: LAN speed?????
From: Arnie Frisch
Date: Thu, 12 Apr 1990 21:57
Date: Thu, 12 Apr 1990 21:57
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1599 bytes
In article <19603@boulder.Colorado.EDU> wallwey@snoopy.Colorado.EDU (WALLWEY DEAN WILLIAM) writes: > >Does anybody know the realistic speed limit of data transfer that can >reliably be sent over RG-58 (or even the 75-ohm RG-59). > >[Personally I think LANS should be able to go lot faster than then >the 10 megabit/sec. standard Ethernet---Anybody actually know? I'm >basing this guess on the fact that I'm able to receive 40 channles of >real time videa over RG-59(just like RG-58 only different impedence) via >local cable. If each station requires about 6MHz of bandwidth alone, >than ethernet should be no where near the limits of the RG-58 cable. > RG-58 has 1.4 db of loss per 100 ft at 10 megaHertz. The standard ethernet cable has less loss than this, but long runs obviously degrade its signal quality. The thru-put of ethernet is much lower than 10 megabits per second because of protocol and SW overhead. An excellent system can run at 1 megabit persecond. Most workstations run at 100 to 300 kbits per second. Arnold Frisch Tektronix Laboratories
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arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!mailrus!umich!samsung!cs.utexas.edu!uunet!zephyr.ens.tek.com!tekcrl!tekgvs!arniefReferences:
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!mailrus!umich!samsung!cs.utexas.edu!uunet!zephyr.ens.tek.com!tekcrl!tekgvs!arnief From: arnief@tekgvs.LABS.TEK.COM (Arnie Frisch) Newsgroups: sci.electronics Subject: Re: LAN speed????? Keywords: Ethernet, cable, transmission line. Message-ID: <7301@tekgvs.LABS.TEK.COM> Date: 12 Apr 90 21:57:11 GMT References: <19603@boulder.Colorado.EDU> Reply-To: arnief@tekgvs.LABS.TEK.COM (Arnie Frisch) Organization: Tektronix, Inc., Beaverton, OR. Lines: 23