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!
On Sat, Dec 25, 2010 at 8:12 PM, S Mathias smathias1972@yahoo.com 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
Although logically it appears that the wiring should work, I suggest you stick with the official 568A/B scheme, especially if you are using Gigabit fabric (all four TPs are used)
Pls. see
http://www.zytrax.com/tech/layer_1/cables/tech_lan.htm http://en.wikipedia.org/wiki/Category_6_cable http://en.wikipedia.org/wiki/Ethernet_crossover_cable
HTH -- Arun Khan
Hi am blind and wonder if there is a way to install cent with speech?
On Sat, Dec 25, 2010 at 2:11 PM, mike cutie and maia mstopka@centurytel.net wrote:
Hi am blind and wonder if there is a way to install cent with speech?
What an interesting idea. As someone who's done work with blind and deaf experiemental subjects, you've raised my interest.
The answer is "not easily". It's possible to use a remote serial connection to navigate through the installation options, tied to a text to speech synthesizer and appropriate keyboard or speecto to text controller. That would require a separate system with the speech to text tools, such as the Dragon company's software, and the ability to reliably handle the text commands. Since the text installer involves a lot of hitting the "tab" key to bounce from line to line, even in the pure text mode, it wouldn't be simple.
I suggest that you'd be better off collaborating with a competent RHEL or CentOS administrator to tune a kickstart file to your needs, and use that to deploy a pre-structured operating system configuration.
hey there no but you can with braille with a unofficial iso image i have one on my other machine here i think
lör 2010-12-25 klockan 19:36 -0500 skrev Nico Kadel-Garcia:
On Sat, Dec 25, 2010 at 2:11 PM, mike cutie and maia mstopka@centurytel.net wrote:
Hi am blind and wonder if there is a way to install cent with speech?
What an interesting idea. As someone who's done work with blind and deaf experiemental subjects, you've raised my interest.
The answer is "not easily". It's possible to use a remote serial connection to navigate through the installation options, tied to a text to speech synthesizer and appropriate keyboard or speecto to text controller. That would require a separate system with the speech to text tools, such as the Dragon company's software, and the ability to reliably handle the text commands. Since the text installer involves a lot of hitting the "tab" key to bounce from line to line, even in the pure text mode, it wouldn't be simple.
I suggest that you'd be better off collaborating with a competent RHEL or CentOS administrator to tune a kickstart file to your needs, and use that to deploy a pre-structured operating system configuration. _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Do you have any ideas who I could get in touch with to do this? I wood love to help to get a version made for the blind
-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of Nico Kadel-Garcia Sent: Saturday, December 25, 2010 6:37 PM To: CentOS mailing list Subject: Re: [CentOS] installing with speech?
On Sat, Dec 25, 2010 at 2:11 PM, mike cutie and maia mstopka@centurytel.net wrote:
Hi am blind and wonder if there is a way to install cent with speech?
What an interesting idea. As someone who's done work with blind and deaf experiemental subjects, you've raised my interest.
The answer is "not easily". It's possible to use a remote serial connection to navigate through the installation options, tied to a text to speech synthesizer and appropriate keyboard or speecto to text controller. That would require a separate system with the speech to text tools, such as the Dragon company's software, and the ability to reliably handle the text commands. Since the text installer involves a lot of hitting the "tab" key to bounce from line to line, even in the pure text mode, it wouldn't be simple.
I suggest that you'd be better off collaborating with a competent RHEL or CentOS administrator to tune a kickstart file to your needs, and use that to deploy a pre-structured operating system configuration. _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
do what? lör 2010-12-25 klockan 18:47 -0600 skrev mike cutie and maia:
Do you have any ideas who I could get in touch with to do this? I wood love to help to get a version made for the blind
-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of Nico Kadel-Garcia Sent: Saturday, December 25, 2010 6:37 PM To: CentOS mailing list Subject: Re: [CentOS] installing with speech?
On Sat, Dec 25, 2010 at 2:11 PM, mike cutie and maia mstopka@centurytel.net wrote:
Hi am blind and wonder if there is a way to install cent with speech?
What an interesting idea. As someone who's done work with blind and deaf experiemental subjects, you've raised my interest.
The answer is "not easily". It's possible to use a remote serial connection to navigate through the installation options, tied to a text to speech synthesizer and appropriate keyboard or speecto to text controller. That would require a separate system with the speech to text tools, such as the Dragon company's software, and the ability to reliably handle the text commands. Since the text installer involves a lot of hitting the "tab" key to bounce from line to line, even in the pure text mode, it wouldn't be simple.
I suggest that you'd be better off collaborating with a competent RHEL or CentOS administrator to tune a kickstart file to your needs, and use that to deploy a pre-structured operating system configuration. _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
I wood like to beable to help them get it to have speech with the install like ubuntu
-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of mattias Sent: Saturday, December 25, 2010 6:50 PM To: CentOS mailing list Subject: Re: [CentOS] installing with speech?
do what? lör 2010-12-25 klockan 18:47 -0600 skrev mike cutie and maia:
Do you have any ideas who I could get in touch with to do this? I wood love to help to get a version made for the blind
-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of Nico Kadel-Garcia Sent: Saturday, December 25, 2010 6:37 PM To: CentOS mailing list Subject: Re: [CentOS] installing with speech?
On Sat, Dec 25, 2010 at 2:11 PM, mike cutie and maia mstopka@centurytel.net wrote:
Hi am blind and wonder if there is a way to install cent with speech?
What an interesting idea. As someone who's done work with blind and deaf experiemental subjects, you've raised my interest.
The answer is "not easily". It's possible to use a remote serial connection to navigate through the installation options, tied to a text to speech synthesizer and appropriate keyboard or speecto to text controller. That would require a separate system with the speech to text tools, such as the Dragon company's software, and the ability to reliably handle the text commands. Since the text installer involves a lot of hitting the "tab" key to bounce from line to line, even in the pure text mode, it wouldn't be simple.
I suggest that you'd be better off collaborating with a competent RHEL or CentOS administrator to tune a kickstart file to your needs, and use that to deploy a pre-structured operating system configuration. _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
_______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
if i say i like debian before ubuntu debian have more frendly ways with accessibility in uuntu you must press f5 and with no eyes learn ways with the arrows like one up enter etc lör 2010-12-25 klockan 18:52 -0600 skrev mike cutie and maia:
I wood like to beable to help them get it to have speech with the install like ubuntu
-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of mattias Sent: Saturday, December 25, 2010 6:50 PM To: CentOS mailing list Subject: Re: [CentOS] installing with speech?
do what? lör 2010-12-25 klockan 18:47 -0600 skrev mike cutie and maia:
Do you have any ideas who I could get in touch with to do this? I wood love to help to get a version made for the blind
-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of Nico Kadel-Garcia Sent: Saturday, December 25, 2010 6:37 PM To: CentOS mailing list Subject: Re: [CentOS] installing with speech?
On Sat, Dec 25, 2010 at 2:11 PM, mike cutie and maia mstopka@centurytel.net wrote:
Hi am blind and wonder if there is a way to install cent with speech?
What an interesting idea. As someone who's done work with blind and deaf experiemental subjects, you've raised my interest.
The answer is "not easily". It's possible to use a remote serial connection to navigate through the installation options, tied to a text to speech synthesizer and appropriate keyboard or speecto to text controller. That would require a separate system with the speech to text tools, such as the Dragon company's software, and the ability to reliably handle the text commands. Since the text installer involves a lot of hitting the "tab" key to bounce from line to line, even in the pure text mode, it wouldn't be simple.
I suggest that you'd be better off collaborating with a competent RHEL or CentOS administrator to tune a kickstart file to your needs, and use that to deploy a pre-structured operating system configuration. _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
I never could get debian to install
-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of mattias Sent: Saturday, December 25, 2010 6:55 PM To: CentOS mailing list Subject: Re: [CentOS] installing with speech?
if i say i like debian before ubuntu debian have more frendly ways with accessibility in uuntu you must press f5 and with no eyes learn ways with the arrows like one up enter etc lör 2010-12-25 klockan 18:52 -0600 skrev mike cutie and maia:
I wood like to beable to help them get it to have speech with the install like ubuntu
-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of mattias Sent: Saturday, December 25, 2010 6:50 PM To: CentOS mailing list Subject: Re: [CentOS] installing with speech?
do what? lör 2010-12-25 klockan 18:47 -0600 skrev mike cutie and maia:
Do you have any ideas who I could get in touch with to do this? I wood love to help to get a version made for the blind
-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of Nico Kadel-Garcia Sent: Saturday, December 25, 2010 6:37 PM To: CentOS mailing list Subject: Re: [CentOS] installing with speech?
On Sat, Dec 25, 2010 at 2:11 PM, mike cutie and maia mstopka@centurytel.net wrote:
Hi am blind and wonder if there is a way to install cent with speech?
What an interesting idea. As someone who's done work with blind and deaf experiemental subjects, you've raised my interest.
The answer is "not easily". It's possible to use a remote serial connection to navigate through the installation options, tied to a text to speech synthesizer and appropriate keyboard or speecto to text controller. That would require a separate system with the speech to text tools, such as the Dragon company's software, and the ability to reliably handle the text commands. Since the text installer involves a lot of hitting the "tab" key to bounce from line to line, even in the pure text mode, it wouldn't be simple.
I suggest that you'd be better off collaborating with a competent RHEL or CentOS administrator to tune a kickstart file to your needs, and use that to deploy a pre-structured operating system configuration. _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
_______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
way not? lör 2010-12-25 klockan 18:57 -0600 skrev mike cutie and maia:
I never could get debian to install
-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of mattias Sent: Saturday, December 25, 2010 6:55 PM To: CentOS mailing list Subject: Re: [CentOS] installing with speech?
if i say i like debian before ubuntu debian have more frendly ways with accessibility in uuntu you must press f5 and with no eyes learn ways with the arrows like one up enter etc lör 2010-12-25 klockan 18:52 -0600 skrev mike cutie and maia:
I wood like to beable to help them get it to have speech with the install like ubuntu
-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of mattias Sent: Saturday, December 25, 2010 6:50 PM To: CentOS mailing list Subject: Re: [CentOS] installing with speech?
do what? lör 2010-12-25 klockan 18:47 -0600 skrev mike cutie and maia:
Do you have any ideas who I could get in touch with to do this? I wood love to help to get a version made for the blind
-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of Nico Kadel-Garcia Sent: Saturday, December 25, 2010 6:37 PM To: CentOS mailing list Subject: Re: [CentOS] installing with speech?
On Sat, Dec 25, 2010 at 2:11 PM, mike cutie and maia mstopka@centurytel.net wrote:
Hi am blind and wonder if there is a way to install cent with speech?
What an interesting idea. As someone who's done work with blind and deaf experiemental subjects, you've raised my interest.
The answer is "not easily". It's possible to use a remote serial connection to navigate through the installation options, tied to a text to speech synthesizer and appropriate keyboard or speecto to text controller. That would require a separate system with the speech to text tools, such as the Dragon company's software, and the ability to reliably handle the text commands. Since the text installer involves a lot of hitting the "tab" key to bounce from line to line, even in the pure text mode, it wouldn't be simple.
I suggest that you'd be better off collaborating with a competent RHEL or CentOS administrator to tune a kickstart file to your needs, and use that to deploy a pre-structured operating system configuration. _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
I could never get speech to work cause I was told that you needed a hardware synth
-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of mattias Sent: Saturday, December 25, 2010 7:02 PM To: CentOS mailing list Subject: Re: [CentOS] installing with speech?
way not? lör 2010-12-25 klockan 18:57 -0600 skrev mike cutie and maia:
I never could get debian to install
-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of mattias Sent: Saturday, December 25, 2010 6:55 PM To: CentOS mailing list Subject: Re: [CentOS] installing with speech?
if i say i like debian before ubuntu debian have more frendly ways with accessibility in uuntu you must press f5 and with no eyes learn ways with the arrows like one up enter etc lör 2010-12-25 klockan 18:52 -0600 skrev mike cutie and maia:
I wood like to beable to help them get it to have speech with the install like ubuntu
-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of mattias Sent: Saturday, December 25, 2010 6:50 PM To: CentOS mailing list Subject: Re: [CentOS] installing with speech?
do what? lör 2010-12-25 klockan 18:47 -0600 skrev mike cutie and maia:
Do you have any ideas who I could get in touch with to do this? I wood love to help to get a version made for the blind
-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of Nico Kadel-Garcia Sent: Saturday, December 25, 2010 6:37 PM To: CentOS mailing list Subject: Re: [CentOS] installing with speech?
On Sat, Dec 25, 2010 at 2:11 PM, mike cutie and maia mstopka@centurytel.net wrote:
Hi am blind and wonder if there is a way to install cent with speech?
What an interesting idea. As someone who's done work with blind and deaf experiemental subjects, you've raised my interest.
The answer is "not easily". It's possible to use a remote serial connection to navigate through the installation options, tied to a text to speech synthesizer and appropriate keyboard or speecto to text controller. That would require a separate system with the speech to text tools, such as the Dragon company's software, and the ability to reliably handle the text commands. Since the text installer involves a lot of hitting the "tab" key to bounce from line to line, even in the pure text mode, it wouldn't be simple.
I suggest that you'd be better off collaborating with a competent RHEL or CentOS administrator to tune a kickstart file to your needs, and use that to deploy a pre-structured operating system configuration. _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
_______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Greetings,
On 12/26/10, mike cutie and maia mstopka@centurytel.net wrote:
I could never get speech to work cause I was told that you needed a hardware synth
A classic case for CentOS Accessibility SIG?
I had tried incompletely something like that years back with f7 or something like that.
There is a related thread: http://linux.derkeiler.com/Mailing-Lists/Fedora/2005-03/0336.html
and here: http://linuxbycalvin.blogspot.com/2006/09/speech-recognition-in-linux.html
Dated though
IIRC EmacsSpeak was one such project
Regards,
Rajagopal
On 12/25/10 6:42 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
no. its critical that the pairs be maintained. ethernet uses differential signalling on pairs. whote/orange and orange/white are a twisted pair, as is each other combination of white/color and color/white. the longer the cable, the more critical this becomes (eg, you could perhaps get away with it on a 2 meter patch cord, but a 30 meter run in a wall would most certainly have crosstalk problems).
##############################################################################################
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?
terrible idea. gigE uses all 4 pairs for a single connection anyways, so you *can't* double up on a patch cord.
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
568A and B aren't straight vs crossover. they are simply two different schemes for the order of the pairs to the connector. basically, they swap the green and orange pairs.
I would stick with T568A
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.:
thats giving me a headache just thinking about it. DO NOT PUT TWO NICs ON ONE RH45 CONNECTOR
On Sat, Dec 25, 2010 at 12:27 PM, John R Pierce pierce@hogranch.com wrote:
On 12/25/10 6:42 AM, S Mathias wrote:
568A and B aren't straight vs crossover. they are simply two different schemes for the order of the pairs to the connector. basically, they swap the green and orange pairs.
I would stick with T568A
I commonly see jacks wired to T568B standard. I've seen some CAT6 jacks with only the colors shown for T568B. The coloring for T568A is backwards compatible with 1 or 2 line phone connectors.
Ryan
On 25.12.2010 20:29, Ryan Wagoner wrote:
I commonly see jacks wired to T568B standard. I've seen some CAT6 jacks with only the colors shown for T568B. The coloring for T568A is backwards compatible with 1 or 2 line phone connectors.
The B is the most common, and that is the one I use.
As for the two ports on one cable, you could do that with cat7 cable, as each strand is seperately shielded. For up to 100Mb Ethernet only. As someone else said, GigE use all eight strands in the cable. Kind of moot point now, who would cable for 100Mb only?
On 12/25/2010 9:42 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 colors are not important aside from standardization. If you need to fix one end of the cable, you have to make sure it's the same as the other end. If you use the standard color scheme, that is not a problem.
What IS important is the pairing. In your second example, you have messed up the pairings. This may work, but is not optimal. You could do something like this:
white-brown, brown, white-orange, blue, white-blue, orange, white-green, green
But there is really no reason for it. Just stick to the standard colors and save yourself (and anyone else who works on the cabling later) the headaches.
##############################################################################################
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?
Sorry, I don't follow this question.
On 28.12.2010 15:20, Bowie Bailey wrote:
The colors are not important aside from standardization. If you need to fix one end of the cable, you have to make sure it's the same as the other end. If you use the standard color scheme, that is not a problem.
Not sure if that is true. I've always been told that the particular pin-layout is to reduce crosstalk.
Ref. http://en.wikipedia.org/wiki/568A#Wiring
On 12/28/2010 2:51 PM, Morten Torstensen wrote:
On 28.12.2010 15:20, Bowie Bailey wrote:
The colors are not important aside from standardization. If you need to fix one end of the cable, you have to make sure it's the same as the other end. If you use the standard color scheme, that is not a problem.
Not sure if that is true. I've always been told that the particular pin-layout is to reduce crosstalk.
Right. That's what I explained in the part of my post that you did not quote. :)
The colors do not matter. What matters is the pairs.
The colors do not matter. What matters is the pairs.
And every person who comes after you will curse your work because *both* the colors *and* the pairs are part of the 568A/B standard.
In my shop if you tried that you'd be very quickly looking for work elsewhere. ;-)
On 12/28/2010 08:01 PM, Drew wrote:
The colors do not matter. What matters is the pairs.
And every person who comes after you will curse your work because *both* the colors *and* the pairs are part of the 568A/B standard.
In my shop if you tried that you'd be very quickly looking for work elsewhere. ;-)
Electrically it matters also. If you want to be able to have the cable usable to the full distance specified by the standard, colors matter. The reason is placement in the bundle and crosstalk between the pairs.
For very short patch cables it would not matter, electrically.
-------- Original Message -------- Subject: Re: [CentOS] 2 Ethernet cabling question From: Raymond Lillard ryl@sonic.net To: CentOS mailing list centos@centos.org Date: Wednesday, December 29, 2010 12:36:43 AM
On 12/28/2010 08:01 PM, Drew wrote:
The colors do not matter. What matters is the pairs.
And every person who comes after you will curse your work because *both* the colors *and* the pairs are part of the 568A/B standard.
In my shop if you tried that you'd be very quickly looking for work elsewhere. ;-)
Electrically it matters also. If you want to be able to have the cable usable to the full distance specified by the standard, colors matter. The reason is placement in the bundle and crosstalk between the pairs.
I concur. What some people gloss over is that not all the pairs are the same. Take an ethernet cable apart at some length greater than a few inches and you will immediately see that some pairs can have twice as many twists as another. This results in slightly different electrical and delay properties for each pair - that become exaggerated at distance. Bottom line, stick with the color scheme.
On 12/29/2010 9:52 AM, Blake Hudson wrote:
-------- Original Message -------- Subject: Re: [CentOS] 2 Ethernet cabling question From: Raymond Lillard ryl@sonic.net To: CentOS mailing list centos@centos.org Date: Wednesday, December 29, 2010 12:36:43 AM
On 12/28/2010 08:01 PM, Drew wrote:
The colors do not matter. What matters is the pairs.
And every person who comes after you will curse your work because *both* the colors *and* the pairs are part of the 568A/B standard.
In my shop if you tried that you'd be very quickly looking for work elsewhere. ;-)
Electrically it matters also. If you want to be able to have the cable usable to the full distance specified by the standard, colors matter. The reason is placement in the bundle and crosstalk between the pairs.
I concur. What some people gloss over is that not all the pairs are the same. Take an ethernet cable apart at some length greater than a few inches and you will immediately see that some pairs can have twice as many twists as another. This results in slightly different electrical and delay properties for each pair - that become exaggerated at distance. Bottom line, stick with the color scheme.
Now THAT, I did not know. I've never stripped a network cable farther than the inch or two I need in order to crimp on connectors.
And to set the record straight, I originally said that switching the color scheme (even if you keep the matched pairs), is a bad idea because it will come back to bite you (or someone else) when you have to do work on the network later. All I was saying is that it is possible to do -- not that it is a good idea.
Bowie Bailey wrote:
On 12/29/2010 9:52 AM, Blake Hudson wrote:
-------- Original Message -------- Subject: Re: [CentOS] 2 Ethernet cabling question From: Raymond Lillard ryl@sonic.net
On 12/28/2010 08:01 PM, Drew wrote:
The colors do not matter. What matters is the pairs.
And every person who comes after you will curse your work because *both* the colors *and* the pairs are part of the 568A/B standard.
In my shop if you tried that you'd be very quickly looking for work elsewhere. ;-)
Electrically it matters also. If you want to be able to have the cable usable to the full distance specified by the standard, colors matter. The reason is placement in the bundle and crosstalk between the pairs.
I concur. What some people gloss over is that not all the pairs are the same. Take an ethernet cable apart at some length greater than a few inches and you will immediately see that some pairs can have twice as many twists as another. This results in slightly different electrical and delay properties for each pair - that become exaggerated at distance. Bottom line, stick with the color scheme.
Now THAT, I did not know. I've never stripped a network cable farther than the inch or two I need in order to crimp on connectors.
And to set the record straight, I originally said that switching the color scheme (even if you keep the matched pairs), is a bad idea because it will come back to bite you (or someone else) when you have to do work on the network later. All I was saying is that it is possible to do -- not that it is a good idea.
What he said: even if this is at home, how sure are you that you'll remember when, a year or two from now, someone accidently pulls the, and you have to redo the plug?
The correct quote is not "consistancy is the bugaboo of small minds", but rather "a *foolish* consistancy is the bugaboo of small minds" (emphasis mine). A reasonable consistancy, and following standards and best practices and standard practice, helps keep you from shooting yourself in the foot.
mark
On Tue, Dec 28, 2010 at 3:01 PM, Bowie Bailey Bowie_Bailey@buc.com wrote:
On 12/28/2010 2:51 PM, Morten Torstensen wrote:
On 28.12.2010 15:20, Bowie Bailey wrote:
The colors are not important aside from standardization. If you need to fix one end of the cable, you have to make sure it's the same as the other end. If you use the standard color scheme, that is not a problem.
Not sure if that is true. I've always been told that the particular pin-layout is to reduce crosstalk.
Right. That's what I explained in the part of my post that you did not quote. :)
The colors do not matter. What matters is the pairs.
The colors are directly linked to the pairing. Don't tell the newbies that neutral and ground are the same thing, don't tell the newbies to lick the freezing lamp pole, and don't tell the newbies to get cute with the color coding. Ignoring the standard color code is for emergencies, not for standard wiring.
Don't tug on Superman's cape. Don't spit into the wind. Don't pull the mask off the old Lone Ranger, and don't mess around with the color coding of any electrical wiring.
The colors are directly linked to the pairing. Don't tell the newbies that neutral and ground are the same thing, don't tell the newbies to lick the freezing lamp pole, and don't tell the newbies to get cute with the color coding. Ignoring the standard color code is for emergencies, not for standard wiring.
Don't tug on Superman's cape. Don't spit into the wind. Don't pull the mask off the old Lone Ranger, and don't mess around with the color coding of any electrical wiring.
And with that I deem this thread finished. :-)
-
Arun Khan -
Blake Hudson -
Bowie Bailey -
Drew -
John R Pierce -
m.roth＠5-cent.us -
mattias -
mike cutie and maia -
Morten Torstensen -
Nico Kadel-Garcia -
Rajagopal Swaminathan -
Raymond Lillard -
Ryan Wagoner -
S Mathias