This is a multi-part message in MIME format. --------------C486EB874483F2E0622C70AC Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Gene Holmerud wrote: > A little more clarification: > > 1) Token ring cable can be twisted-pair or shielded. The sheilded > form is two pairs of wires, each pair is wrapped in foil to prevent > crosstalk to the other pair. It's actually a current loop scheme, > hence the realitively heavy conductor (#20 comes to mind). > > 2) Cat-5 is unshelded, four pairs of wires twisted. Each pair has a > different number of twists per foot, which helps minimize the > crosstalk problem. And there are standards as to which connector (RJ- > 45) pin number each wire connects to, so that the pairing comes out > right. Cat-5 can be used for Ethernet. Unshielded twisted pair can > also be used for Token-ring, but this T-R must be supplied a small > amount of power at hubs since it's current carrying ability is > ziltch. Mike mentioned CAT-4 UTP was for T-R and that's a new nerdle > of wisdom for me. > > Gene > > From: "Mike Sheldon" > To: > Subject: RE: sheilded Cat-5 > Date sent: Thu, 29 Jun 2000 21:49:34 -0700 > Send reply to: plug-discuss@lists.plug.phoenix.az.us > > > >>When I say twisted, the cables are definently twisted around each other. > > > > Ahh, you're talking about stranded wire vs. solid core. Either one can be > > certified CAT-5, but be sure that the connectors are for stranded wire. Most > > are for solid wire, and there is a difference. > > > > I've still never seen shielded CAT-5 before. I'm not saying it doesn't > > exist, but be sure that the wire actually is CAT-5, and not CAT-3 or CAT-4. > > > > Michael J. Sheldon > > Internet Applications Developer > > Phone: 480.699.1084 > > http://www.desertraven.com/ > > PGP Key Available on Request > > -----Original Message----- > > From: plug-discuss-admin@lists.PLUG.phoenix.az.us > > [mailto:plug-discuss-admin@lists.PLUG.phoenix.az.us]On Behalf Of colin rasor > > Sent: Wednesday, June 28, 2000 20:00 > > To: plug-discuss@lists.PLUG.phoenix.az.us > > Subject: Re: sheilded Cat-5 > > > > > > Thanks Mike > > The wire is going in a machine shop. > > Mike I might be a little confused, (please correct me if I am wrong.) When > > I say twisted, the cables are definently twisted around each other. The > > copper wire inside is not twisted and is solid, is this Cat4? Also the Wire > > that I have seen that claims to be shielded is coated in a foil type > > substance with a bare wire running on the outside of it. Of course this is > > all incased in you typical blue (or color of choice). > > The reason we worry about using "shielded" is that that we don't want to be > > losing any data do to RF while it is running through the shop. > > Conduit would be about the same price to run with labor. As the so called > > shielded wire. > > Thank you again for you input. > > Colin Ansel Rasor > > > > Mike Sheldon wrote: > > Cat-5 isn't Cat-5 unless it's twisted, the twists are what prevents > > interference between the pairs, as well as from outside sources. > > As far as shielded Cat-5? I've never seen such a thing. There was a shielded > > twisted pair that IBM used for token-ring, but that's Cat-4. Cat-4 is NOT > > rated for 100mbps > > Shielded Pros: Less outside interference in extremely noisy (electrical) > > areas. > > Unshielded Pros: 100mbps, much cheaper, resistant to electrical noise in all > > but the worst environments when properly installed. > > Use Cat-5 unless you're wiring a machine shop. If you're wiring a machine > > shop, run Cat-5 in metal conduit. > > Michael J. Sheldon > > Internet Applications Developer > > Phone: 480.699.1084 > > http://www.desertraven.com/ > > PGP Key Available on Request > > -----Original Message----- > > From: plug-discuss-admin@lists.PLUG.phoenix.az.us > > [mailto:plug-discuss-admin@lists.PLUG.phoenix.az.us]On Behalf Of colin > > rasor > > Sent: Wednesday, June 28, 2000 17:03 > > To: plug-discuss@lists.PLUG.phoenix.az.us > > Subject: sheilded Cat-5 > > Hello everybody, > > I was wondering the best place to buy shielded cat5 non twisted. I am > > looking for around 2000ft. > > What are the pros to using shielded compared to non shielded? > > Colin Ansel Rasor > > _______________________________________________ > > Plug-discuss mailing list - Plug-discuss@lists.PLUG.phoenix.az.us > > http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discussthanks > > > > > > _______________________________________________ > > Plug-discuss mailing list - Plug-discuss@lists.PLUG.phoenix.az.us > > http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss > > _______________________________________________ > Plug-discuss mailing list - Plug-discuss@lists.PLUG.phoenix.az.us > http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss Gene, Thank you for the information. Colin Ansel Rasor --------------C486EB874483F2E0622C70AC Content-Type: text/x-vcard; charset=us-ascii; name=" linuxnet.vcf" Content-Transfer-Encoding: 7bit Content-Description: Card for colin rasor Content-Disposition: attachment; filename=" linuxnet.vcf" begin:vcard n:Rasor;Colin tel;work:6023040299 x-mozilla-html:FALSE url:http://www.specializedmillwork.com org:http://www.specializedmillwork.com;IS version:2.1 email;internet:linuxnet@home.com adr;quoted-printable:;; 1918 S. VanBurean st. =0D=0A=0D=0A=0D=0A;Phoenix;AZ;85010;United States of America x-mozilla-cpt:;2 fn:Colin Rasor end:vcard --------------C486EB874483F2E0622C70AC--