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568a or b. what's everyone doing in residential
This thread has 58 replies. Displaying posts 31 through 45.
Post 31 made on Wednesday June 20, 2012 at 00:27
pilgram
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On June 19, 2012 at 23:03, PeterN said...
I can't believe no one is wiring to the ELAN standard. I recall one of their instructors saying it pre-dated T568A/B.

LOL!
I remember hearing that too!

I can do "A","B",and "Elan" from memory so it doesn't really matter to me,as long as I know whats on the other end!!
Every day is a good day.......some are just better than others!

Proud to say that my property is protected by a high speed wireless device!
Post 32 made on Wednesday June 20, 2012 at 00:58
radiorhea
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B only.....................


nuttin else
Drinking upstream from the herd since 1960
Post 33 made on Wednesday June 20, 2012 at 13:04
fcwilt
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Perhaps the obvious should be mentioned - you can have a mix of A or B.

As long as both ends of a run/cable are the same.

So the fact that pre-made patch cables may be one or the other doesn't mean the scheme used for the patch cables needs to dictate what is used elsewhere.

That said it may be of interest to note the Leviton jacks come with peel-off labels to reveal the color-coding for A - the default being B.
Regards, Frederick C. Wilt
Post 34 made on Thursday June 21, 2012 at 06:37
Ernie Gilman
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On June 19, 2012 at 23:09, Fins said...
I shouldn't have joked earlier. After reterminating a dozen keypad connections for élan keypads today, my helper turned around and screwed up ten patch cables by completely reversing the solids and stripes for a standard 568A end.

I did something like that a few months ago. I carefully fanned out the wires, got them in order, and very exactly slipped the connectors on upside down. It read like hell on the tester!

On June 19, 2012 at 10:20, Audiophiliac said...
I like to use B. Especially since we started working with CAT6 more. It is just easier to terminate. :)

Why? Since there is no spec for which wires have the most twist, there probably is no spec for how the wires are arranged in a particular model of cable. Therefore you could decide to change wire brands and suddenly find A is easier. And as far as that goes, either one should be harder to terminate at one end than the other due to the reversal of order of the wires. Yeah, I know you're fanning them out, but it's still a bit more easy to do it one way than another, and that reverses at the other end.

Of course, I could be wrong.
A good answer is easier with a clear question giving the make and model of everything.
"The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
Post 35 made on Thursday June 21, 2012 at 06:43
Ernie Gilman
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On June 20, 2012 at 13:04, fcwilt said...
Perhaps the obvious should be mentioned - you can have a mix of A or B.

This is just fine until a connector is bad, you cut off the old one, and use the wrong code for the new one.

As long as both ends of a run/cable are the same.

Haven't we seen cables that are plugged into a panel, then go disappear into the wall or ceiling and go many feet, where we can't tell where they go? You can't check the other end of such a cable if you have to terminate it.

So the fact that pre-made patch cables may be one or the other doesn't mean the scheme used for the patch cables needs to dictate what is used elsewhere.

That's true but the ready-mades damn well better not look hand-made, or there will be blood.
A good answer is easier with a clear question giving the make and model of everything.
"The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
Post 36 made on Thursday June 21, 2012 at 11:05
fcwilt
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On June 21, 2012 at 06:43, Ernie Gilman said...
This is just fine until a connector is bad, you cut off the old one, and use the wrong code for the new one.

Well clearly you have to wire the new connector the same as the old one. I did say both ends have to be the same.

Haven't we seen cables that are plugged into a panel, then go disappear into the wall or ceiling and go many feet, where we can't tell where they go? You can't check the other end of such a cable if you have to terminate it.

In this case simply sticking to your personal standard of A or B doesn't mean that you will match the other end - you will have to find the other end first and see how is is terminated.


That's true but the ready-mades damn well better not look hand-made, or there will be blood.

You've lost me here.
Regards, Frederick C. Wilt
Post 37 made on Thursday June 21, 2012 at 13:03
jrainey
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How to start a fist fight in a bar full of CI's?

Stand in the middle of the bar and yell "Your Momma terminates 568-B"

(or "A" if that is your persuasion….)
Jack Rainey - Full disclosure...reformed integrator, now mid-Atlantic manufacturers rep for: Integra, Paradigm, Anthem, Parasound, Atlona, LG TV's and Metra Home Theater...among others
Post 38 made on Thursday June 21, 2012 at 16:14
Ernie Gilman
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On June 21, 2012 at 11:05, fcwilt said...
Well clearly you have to wire the new connector the same as the old one. I did say both ends have to be the same.

My point is that you often cannot see the other end.

You've lost me here.

If you use cables that are factory made, it doesn't matter which way they're terminated. True. But service sometimes requires reterminating cables -- the weak point in following A or B -- and if the entire cabling system has, say, A in factory-made cables and B in hand-made cables, but you can't tell which are factory and which are hand-made because they look the same, there will be blood -- that is, mistakes will be made.

It's easy to say they all have to be the same. In fact, this thread is more or less about working out whether there's a particular "same" to use all the time. There isn't, and the likelihood of particular trades using A or B is pretty consistent, based on the answers here.
A good answer is easier with a clear question giving the make and model of everything.
"The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
Post 39 made on Thursday June 21, 2012 at 16:45
juliejacobson
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On June 19, 2012 at 10:20, Audiophiliac said...
I like to use B. Especially since we started working with CAT6 more. It is just easier to terminate. :)

LOL
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Post 40 made on Friday June 22, 2012 at 12:21
oshack
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I've always used B. Surprised there isn't a Ethernet cable checker that would let you know the configuration whether it be A or B
Post 41 made on Friday June 22, 2012 at 14:35
fcwilt
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On June 22, 2012 at 12:21, oshack said...
I've always used B. Surprised there isn't a Ethernet cable checker that would let you know the configuration whether it be A or B

The only difference is the color of the wires (a pair is swapped with another pair).

The connections, pin to pin, are the same.
Regards, Frederick C. Wilt
Post 42 made on Friday June 22, 2012 at 14:38
Audiophiliac
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On June 21, 2012 at 16:45, juliejacobson said...
LOL

I was not making a funny! :) This will be in response to Ernie's "Why?" as well...

Every brand of CAT6 I have used (which is probably only 4 or 5 brands) have been the same. They each have the spline, separator, or "cross-web divider", as Belden calls it, in the center. And the way the pairs are laid out puts green at "12:00", blue at "6:00" (those 2 may be mixed up...I do not have a piece of CAT6 near me to check, but you get the picture), orange at "9:00" and brown at "3:00". This makes it much easier to terminate using 568B. I just hate the "load bars" or "strain relief" doohickeys.
"When I eat, it is the food that is scared." - Ron Swanson
Post 43 made on Friday June 22, 2012 at 19:33
fcwilt
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On June 22, 2012 at 14:38, Audiophiliac said...

...puts green at "12:00", blue at "6:00" (those 2 may be mixed up...I do not have a piece of CAT6 near me to check, but you get the picture), orange at "9:00" and brown at "3:00".

Give this some more thought...
Regards, Frederick C. Wilt
Post 44 made on Friday June 22, 2012 at 22:41
Ranger Home
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On June 22, 2012 at 14:38, Audiophiliac said...
I was not making a funny! :) This will be in response to Ernie's "Why?" as well...

Every brand of CAT6 I have used (which is probably only 4 or 5 brands) have been the same. They each have the spline, separator, or "cross-web divider", as Belden calls it, in the center. And the way the pairs are laid out puts green at "12:00", blue at "6:00" (those 2 may be mixed up...I do not have a piece of CAT6 near me to check, but you get the picture), orange at "9:00" and brown at "3:00".

I have no idea what this means. What connectors are round? LOL
Post 45 made on Saturday June 23, 2012 at 01:45
MacrossZero
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On June 21, 2012 at 13:03, jrainey said...
How to start a fist fight in a bar full of CI's?

Stand in the middle of the bar and yell "Your Momma terminates 568-B"

(or "A" if that is your persuasion….)

roflmao
Do or Do not, There is no Try.
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