2 Ethernet cabling question
Two questions that was not always clear for me [sorry for posting to this list :\]: ## Q1) when cabling, is the color order important? like: straight cabling: A side: white-orange, orange, white-green, blue, white-blue, green, white-brown, brown B side: white-orange, orange, white-green, blue, white-blue, green, white-brown, brown could be eg.: like this?? A side: white-orange, brown, white-blue, green, white-green, blue, white-brown, orange B side: white-orange, brown, white-blue, green, white-green, blue, white-brown, orange ## Q2) again cabling.. i know what is the color order of straight and crossover cabling. BUT: what are the color orders, when i need to create physically two separated networks? 568B; straight; nic to switch: A side: white-orange, orange, white-green, blue, white-blue, green, white-brown, brown B side: white-orange, orange, white-green, blue, white-blue, green, white-brown, brown -- 568A; crossover; nic to nic: [it's not so important about from ~2005]: switch the pairs: 1&2 with 3&6 on one side: A side: white-green, green, white-orange, blue, white-blue, orange, white-brown, brown B side: white-orange, orange, white-green, blue, white-blue, green, white-brown, brown -- one cable, two straight networks: A side: I.: II.: B side: I.: II.: -- one cable, two crossover networks: A side: I.: II.: B side: I.: II.: -- one cable, one straight and one crossover network: A side [straight]: I.: II.: B side [crossover]: I.: II.: -- one cable, one crossover and one straight network: A side [crossover]: I.: II.: B side [straight]: I.: II.: ## Thank you for any pointings, links, or specific answers. Happy Christmas! -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/300521.28446...@web121410.mail.ne1.yahoo.com
Re: 2 Ethernet cabling question
On Saturday 25 December 2010 08:42:52 S Mathias wrote: > Two questions that was not always clear for me [sorry for posting to this > list :\]: > > ### > ### > > Q1) when cabling, is the color order important? like: > > straight cabling: > A side: white-orange, orange, white-green, blue, white-blue, green, > white-brown, brown B side: white-orange, orange, white-green, blue, > white-blue, green, white-brown, brown > > could be eg.: like this?? > A side: white-orange, brown, white-blue, green, white-green, blue, > white-brown, orange B side: white-orange, brown, white-blue, green, > white-green, blue, white-brown, orange Depends. Firstly, non-standard order might confuse the heck out of other techs. More important, if you are just installing the tips and the majority of the cable is pre-made, they might be using a twisting/braiding order that minimizes noise where using the standard cable ordering. Naively, there's no problem; and using a non-standard order should work, but using the standard order is well-advised. If you are twisting/braiding your own cable, the best ordering is based how you twist/braid the wires. > ### > ### > > Q2) again cabling.. i know what is the color order of straight and > crossover cabling. BUT: what are the color orders, when i need to create > physically two separated networks? I don't recommend combining more than the 8 wires in a single cable when doing ethernet. Just run multiple cables and bind them together. Cross-talk between cables is less of an issue than cross-talk between wires in a single cable. However, you are correct that would be minimized by running all the wires in a single cable, IF you use the correct braiding/twisting order through the length of the cable. I know the generic algorithm for braiding N straight wires in a round cable involves primitive roots of the modular ring N, but I don't know how to practically apply that to braiding my own cable. -- Boyd Stephen Smith Jr. ,= ,-_-. =. b...@iguanasuicide.net ((_/)o o(\_)) ICQ: 514984 YM/AIM: DaTwinkDaddy `-'(. .)`-' http://iguanasuicide.net/\_/ signature.asc Description: This is a digitally signed message part.
Re: 2 Ethernet cabling question
On Saturday 25 December 2010 09:42 am, S Mathias wrote: > Two questions that was not always clear for me [sorry for posting to this > list :\]: > > ### >### > > Q1) when cabling, is the color order important? like: > > straight cabling: > A side: white-orange, orange, white-green, blue, white-blue, green, > white-brown, brown B side: white-orange, orange, white-green, blue, > white-blue, green, white-brown, brown > > could be eg.: like this?? > A side: white-orange, brown, white-blue, green, white-green, blue, > white-brown, orange B side: white-orange, brown, white-blue, green, > white-green, blue, white-brown, orange > > ### >### The order was determined to minimize cross-talk on the adjacent wires. Your best bet is to stay with the standard. So, yes, the order is important. > > Q2) again cabling.. i know what is the color order of straight and > crossover cabling. BUT: what are the color orders, when i need to create > physically two separated networks? > > 568B; straight; nic to switch: > A side: white-orange, orange, white-green, blue, white-blue, green, > white-brown, brown B side: white-orange, orange, white-green, blue, > white-blue, green, white-brown, brown -- > 568A; crossover; nic to nic: [it's not so important about from ~2005]: > switch the pairs: 1&2 with 3&6 on one side: > A side: white-green, green, white-orange, blue, white-blue, orange, > white-brown, brown B side: white-orange, orange, white-green, blue, > white-blue, green, white-brown, brown -- > one cable, two straight networks: > A side: > I.: > II.: > B side: > I.: > II.: > -- > one cable, two crossover networks: > A side: > I.: > II.: > B side: > I.: > II.: > -- > one cable, one straight and one crossover network: > A side [straight]: > I.: > II.: > B side [crossover]: > I.: > II.: > -- > one cable, one crossover and one straight network: > A side [crossover]: > I.: > II.: > B side [straight]: > I.: > II.: > Please explain what you are trying to accomplish and at what network speeds. Off the top of my head, 10baseT networks used 4 wires and 100baseT used all 8 wires. If you are trying for 100baseT speeds, you have to use all 8 wires. Did you notice how difficult the kind of cabling you want is to find? There is a reason for that. Mark -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/201012251147.12334.m...@neidorff.com
Re: 2 Ethernet cabling question
S Mathias wrote: Q1) when cabling, is the color order important? like: Yes. Conductor colors and pin terminations are per the standard TIA/EIA-568-B.1-2000: http://en.wikipedia.org/wiki/TIA/EIA-568-B Most factory-made Ethernet patch cables I've seen use T568B on both ends. That's how I make my cables. Crossover cables use T568B on one end and T568A on the other. Q2) again cabling.. i know what is the color order of straight and crossover cabling. BUT: what are the color orders, when i need to create physically two separated networks? Use a separate cable for each network connection. I buy Category 5e riser cable for use with Fast and/or Gigabit Ethernet. You will want a crimp tool, connectors, and cable tester. My local home improvement store (Home Depot) carries products made by Ideal: http://www.idealindustries.com/prodDetail.do?prodId=30-696 http://www.idealindustries.com/prodDetail.do?prodId=85-396 http://www.idealindustries.com/prodDetail.do?prodId=62-200 The Ideal LinkMaster Tester remote unit includes a useful T568A and T568B wiring diagram printed on its face. HTH, David -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/4d16404f.2060...@holgerdanske.com
Re: 2 Ethernet cabling question
On Sat, 25 Dec 2010 11:47:12 -0500 Mark Neidorff wrote: > > The order was determined to minimize cross-talk on the adjacent > wires. Your best bet is to stay with the standard. So, yes, the > order is important. yep, I know from personal experience that 100 won't work if you don't use the proper order :-( -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20101225112002.49b73...@windy.deldotd.com
Re: 2 Ethernet cabling question
Mark Neidorff put forth on 12/25/2010 10:47 AM: > Please explain what you are trying to accomplish and at what network speeds. > Off the top of my head, 10baseT networks used 4 wires and 100baseT used all 8 > wires. If you are trying for 100baseT speeds, you have to use all 8 wires. If memory serves me well, this is wrong Mark. Both 10BaseT and 100BaseT only use 2 pair, one each direction. 1000BaseT uses all 4 pair, two each direction. 1000BaseTX uses only 2 pair. 1000BaseT can run over Cat5 or above. 1000BaseTX requires Cat 6 or above. Ahh, here we go: http://en.wikipedia.org/wiki/Ethernet http://en.wikipedia.org/wiki/1000baseT#1000BASE-T -- Stan -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/4d174386.8030...@hardwarefreak.com
