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On Mon, 26 Dec 2022 05:05:36 -0500, Paul <nospam@needed.invalid> wrote:
The T368A and T368B thing is for rolled or straight-thru cabling.
If both ends of a cable are 568A, or if both ends are 568B, it\'s a
straight-through cable. If one end of a cable is 568A and the other end
is 568B, it\'s a crossover cable, what you call rolled, below.
Crossover cables are very rarely needed these days. All of mine are long
gone. What\'s important is to pick a wiring standard and stick with it. I
use 568B, but that\'s just personal preference and momentum.
https://www.truecable.com/blogs/cable-academy/t568a-vs-t568b
I can tell this, by noting the reversal of 1,2 3,6 on the two connectors
in the depiction.
1,2 to 1,2 Straight-thru (most all of my cables are like this)
3,6 to 3,6
1,2 to 3,6 Rolled cable (only one spare is like this, haven\'t used in some time)
3,6 to 1,2 (Could have blue boot on one end, red boot on other end of cable)
Any more info than that, you\'ll have to look up. A rolled cable
might be used between a broadband modem and a router. Straight cables
tend to be used from router to PC or switch to PC. Doing direct PC to PC,
uses a rolled cable (only if both ends are limited to 10/100BT NICs).
GbE equipment has MDI/MDIX which can deal with either straight or
rolled cabling.
On Mon, 26 Dec 2022 05:05:36 -0500, Paul <nospam@needed.invalid> wrote:
The T368A and T368B thing is for rolled or straight-thru cabling.
If both ends of a cable are 568A, or if both ends are 568B, it\'s a
straight-through cable. If one end of a cable is 568A and the other end
is 568B, it\'s a crossover cable, what you call rolled, below.
Crossover cables are very rarely needed these days. All of mine are long
gone. What\'s important is to pick a wiring standard and stick with it. I
use 568B, but that\'s just personal preference and momentum.
https://www.truecable.com/blogs/cable-academy/t568a-vs-t568b
I can tell this, by noting the reversal of 1,2 3,6 on the two connectors
in the depiction.
1,2 to 1,2 Straight-thru (most all of my cables are like this)
3,6 to 3,6
1,2 to 3,6 Rolled cable (only one spare is like this, haven\'t used in some time)
3,6 to 1,2 (Could have blue boot on one end, red boot on other end of cable)
Any more info than that, you\'ll have to look up. A rolled cable
might be used between a broadband modem and a router. Straight cables
tend to be used from router to PC or switch to PC. Doing direct PC to PC,
uses a rolled cable (only if both ends are limited to 10/100BT NICs).
GbE equipment has MDI/MDIX which can deal with either straight or
rolled cabling.
On Mon, 26 Dec 2022 05:05:36 -0500, Paul <nospam@needed.invalid> wrote:
The T368A and T368B thing is for rolled or straight-thru cabling.
If both ends of a cable are 568A, or if both ends are 568B, it\'s a
straight-through cable. If one end of a cable is 568A and the other end
is 568B, it\'s a crossover cable, what you call rolled, below.
Crossover cables are very rarely needed these days. All of mine are long
gone. What\'s important is to pick a wiring standard and stick with it. I
use 568B, but that\'s just personal preference and momentum.
https://www.truecable.com/blogs/cable-academy/t568a-vs-t568b
I can tell this, by noting the reversal of 1,2 3,6 on the two connectors
in the depiction.
1,2 to 1,2 Straight-thru (most all of my cables are like this)
3,6 to 3,6
1,2 to 3,6 Rolled cable (only one spare is like this, haven\'t used in some time)
3,6 to 1,2 (Could have blue boot on one end, red boot on other end of cable)
Any more info than that, you\'ll have to look up. A rolled cable
might be used between a broadband modem and a router. Straight cables
tend to be used from router to PC or switch to PC. Doing direct PC to PC,
uses a rolled cable (only if both ends are limited to 10/100BT NICs).
GbE equipment has MDI/MDIX which can deal with either straight or
rolled cabling.
On Mon, 26 Dec 2022 11:56:48 -0600, Char Jackson <none@none.invalid
wrote:
On Mon, 26 Dec 2022 05:05:36 -0500, Paul <nospam@needed.invalid> wrote:
The T368A and T368B thing is for rolled or straight-thru cabling.
If both ends of a cable are 568A, or if both ends are 568B, it\'s a
straight-through cable. If one end of a cable is 568A and the other end
is 568B, it\'s a crossover cable, what you call rolled, below.
Crossover cables are very rarely needed these days. All of mine are long
gone. What\'s important is to pick a wiring standard and stick with it. I
use 568B, but that\'s just personal preference and momentum.
https://www.truecable.com/blogs/cable-academy/t568a-vs-t568b
I can tell this, by noting the reversal of 1,2 3,6 on the two =
connectors
in the depiction.
1,2 to 1,2 Straight-thru (most all of my cables are like this)
3,6 to 3,6
1,2 to 3,6 Rolled cable (only one spare is like this, haven\'t =
used in some time)
3,6 to 1,2 (Could have blue boot on one end, red =
boot on other end of cable)
Any more info than that, you\'ll have to look up. A rolled cable
might be used between a broadband modem and a router. Straight cables
tend to be used from router to PC or switch to PC. Doing direct PC to =
PC,
uses a rolled cable (only if both ends are limited to 10/100BT NICs).
GbE equipment has MDI/MDIX which can deal with either straight or
rolled cabling.
I had never heard of 568A or 568B before. Short of taking it apart,
is it possible to tell which connector it is?
On Mon, 26 Dec 2022 11:56:48 -0600, Char Jackson <none@none.invalid
wrote:
On Mon, 26 Dec 2022 05:05:36 -0500, Paul <nospam@needed.invalid> wrote:
The T368A and T368B thing is for rolled or straight-thru cabling.
If both ends of a cable are 568A, or if both ends are 568B, it\'s a
straight-through cable. If one end of a cable is 568A and the other end
is 568B, it\'s a crossover cable, what you call rolled, below.
Crossover cables are very rarely needed these days. All of mine are long
gone. What\'s important is to pick a wiring standard and stick with it. I
use 568B, but that\'s just personal preference and momentum.
https://www.truecable.com/blogs/cable-academy/t568a-vs-t568b
I can tell this, by noting the reversal of 1,2 3,6 on the two =
connectors
in the depiction.
1,2 to 1,2 Straight-thru (most all of my cables are like this)
3,6 to 3,6
1,2 to 3,6 Rolled cable (only one spare is like this, haven\'t =
used in some time)
3,6 to 1,2 (Could have blue boot on one end, red =
boot on other end of cable)
Any more info than that, you\'ll have to look up. A rolled cable
might be used between a broadband modem and a router. Straight cables
tend to be used from router to PC or switch to PC. Doing direct PC to =
PC,
uses a rolled cable (only if both ends are limited to 10/100BT NICs).
GbE equipment has MDI/MDIX which can deal with either straight or
rolled cabling.
I had never heard of 568A or 568B before. Short of taking it apart,
is it possible to tell which connector it is?
On Mon, 26 Dec 2022 11:56:48 -0600, Char Jackson <none@none.invalid
wrote:
On Mon, 26 Dec 2022 05:05:36 -0500, Paul <nospam@needed.invalid> wrote:
The T368A and T368B thing is for rolled or straight-thru cabling.
If both ends of a cable are 568A, or if both ends are 568B, it\'s a
straight-through cable. If one end of a cable is 568A and the other end
is 568B, it\'s a crossover cable, what you call rolled, below.
Crossover cables are very rarely needed these days. All of mine are long
gone. What\'s important is to pick a wiring standard and stick with it. I
use 568B, but that\'s just personal preference and momentum.
https://www.truecable.com/blogs/cable-academy/t568a-vs-t568b
I can tell this, by noting the reversal of 1,2 3,6 on the two =
connectors
in the depiction.
1,2 to 1,2 Straight-thru (most all of my cables are like this)
3,6 to 3,6
1,2 to 3,6 Rolled cable (only one spare is like this, haven\'t =
used in some time)
3,6 to 1,2 (Could have blue boot on one end, red =
boot on other end of cable)
Any more info than that, you\'ll have to look up. A rolled cable
might be used between a broadband modem and a router. Straight cables
tend to be used from router to PC or switch to PC. Doing direct PC to =
PC,
uses a rolled cable (only if both ends are limited to 10/100BT NICs).
GbE equipment has MDI/MDIX which can deal with either straight or
rolled cabling.
I had never heard of 568A or 568B before. Short of taking it apart,
is it possible to tell which connector it is?
Ken Blake <Ken@invalid.news.com> writes:
On Mon, 26 Dec 2022 11:56:48 -0600, Char Jackson <none@none.invalid
wrote:
On Mon, 26 Dec 2022 05:05:36 -0500, Paul <nospam@needed.invalid> wrote:
The T368A and T368B thing is for rolled or straight-thru cabling.
If both ends of a cable are 568A, or if both ends are 568B, it\'s a
straight-through cable. If one end of a cable is 568A and the other end
is 568B, it\'s a crossover cable, what you call rolled, below.
Crossover cables are very rarely needed these days. All of mine are long
gone. What\'s important is to pick a wiring standard and stick with it. I
use 568B, but that\'s just personal preference and momentum.
https://www.truecable.com/blogs/cable-academy/t568a-vs-t568b
I can tell this, by noting the reversal of 1,2 3,6 on the two >>connectors
in the depiction.
1,2 to 1,2 Straight-thru (most all of my cables are like this)
3,6 to 3,6
1,2 to 3,6 Rolled cable (only one spare is like this, haven\'t >>used in some time)
3,6 to 1,2 (Could have blue boot on one end, red >>boot on other end of cable)
Any more info than that, you\'ll have to look up. A rolled cable
might be used between a broadband modem and a router. Straight cables
tend to be used from router to PC or switch to PC. Doing direct PC to >>PC,
uses a rolled cable (only if both ends are limited to 10/100BT NICs).
GbE equipment has MDI/MDIX which can deal with either straight or
rolled cabling.
I had never heard of 568A or 568B before. Short of taking it apart,
is it possible to tell which connector it is?
It\'s the same connector (RJ-45) for both.
568A/568B are the standards
for which wire goes to which contact in the (usually) female connector.
Cables (with male connectors) are typically wired straight through or
crossover (rare now).
Ken Blake <Ken@invalid.news.com> writes:
On Mon, 26 Dec 2022 11:56:48 -0600, Char Jackson <none@none.invalid
wrote:
On Mon, 26 Dec 2022 05:05:36 -0500, Paul <nospam@needed.invalid> wrote:
The T368A and T368B thing is for rolled or straight-thru cabling.
If both ends of a cable are 568A, or if both ends are 568B, it\'s a
straight-through cable. If one end of a cable is 568A and the other end
is 568B, it\'s a crossover cable, what you call rolled, below.
Crossover cables are very rarely needed these days. All of mine are long
gone. What\'s important is to pick a wiring standard and stick with it. I
use 568B, but that\'s just personal preference and momentum.
https://www.truecable.com/blogs/cable-academy/t568a-vs-t568b
I can tell this, by noting the reversal of 1,2 3,6 on the two >>connectors
in the depiction.
1,2 to 1,2 Straight-thru (most all of my cables are like this)
3,6 to 3,6
1,2 to 3,6 Rolled cable (only one spare is like this, haven\'t >>used in some time)
3,6 to 1,2 (Could have blue boot on one end, red >>boot on other end of cable)
Any more info than that, you\'ll have to look up. A rolled cable
might be used between a broadband modem and a router. Straight cables
tend to be used from router to PC or switch to PC. Doing direct PC to >>PC,
uses a rolled cable (only if both ends are limited to 10/100BT NICs).
GbE equipment has MDI/MDIX which can deal with either straight or
rolled cabling.
I had never heard of 568A or 568B before. Short of taking it apart,
is it possible to tell which connector it is?
It\'s the same connector (RJ-45) for both.
568A/568B are the standards
for which wire goes to which contact in the (usually) female connector.
Cables (with male connectors) are typically wired straight through or
crossover (rare now).
Ken Blake <Ken@invalid.news.com> writes:
On Mon, 26 Dec 2022 11:56:48 -0600, Char Jackson <none@none.invalid
wrote:
On Mon, 26 Dec 2022 05:05:36 -0500, Paul <nospam@needed.invalid> wrote:
The T368A and T368B thing is for rolled or straight-thru cabling.
If both ends of a cable are 568A, or if both ends are 568B, it\'s a
straight-through cable. If one end of a cable is 568A and the other end
is 568B, it\'s a crossover cable, what you call rolled, below.
Crossover cables are very rarely needed these days. All of mine are long
gone. What\'s important is to pick a wiring standard and stick with it. I
use 568B, but that\'s just personal preference and momentum.
https://www.truecable.com/blogs/cable-academy/t568a-vs-t568b
I can tell this, by noting the reversal of 1,2 3,6 on the two >>connectors
in the depiction.
1,2 to 1,2 Straight-thru (most all of my cables are like this)
3,6 to 3,6
1,2 to 3,6 Rolled cable (only one spare is like this, haven\'t >>used in some time)
3,6 to 1,2 (Could have blue boot on one end, red >>boot on other end of cable)
Any more info than that, you\'ll have to look up. A rolled cable
might be used between a broadband modem and a router. Straight cables
tend to be used from router to PC or switch to PC. Doing direct PC to >>PC,
uses a rolled cable (only if both ends are limited to 10/100BT NICs).
GbE equipment has MDI/MDIX which can deal with either straight or
rolled cabling.
I had never heard of 568A or 568B before. Short of taking it apart,
is it possible to tell which connector it is?
It\'s the same connector (RJ-45) for both.
568A/568B are the standards
for which wire goes to which contact in the (usually) female connector.
Cables (with male connectors) are typically wired straight through or
crossover (rare now).
On Mon, 26 Dec 2022 06:29:32 +0000, Andy Burns <usenet@andyburns.uk
wrote:
Char Jackson wrote:
Andy Burns wrote:
When it happens, chop the lead in two with a vengeance and discard it, so you\'re
not tempted to re-use it later \"just temporarily\" ...
That seems drastic. I\'ve successfully used Ethernet cables where the
barb has fallen off, including one cable that has been barbless for a
number of years.
And then one day, someone is doing the hoovering, or kicks a desk, or a pet gets
round the back, and something stops working ... if you can retuerminate it with
a new plug, sure but patch cables are cheap, stuff not working is frequently
expensive ...
I suppose it could be annoying if a connection comes loose, but it\'s not
like it causes any damage. Just push the plug in and carry on, right? I
get your point, though. One of these years I\'ll probably replace my
barbless cables (or more likely just snip the connector and crimp a new
one). They\'re not causing any problems, though, so it could be a while.
On Mon, 26 Dec 2022 06:29:32 +0000, Andy Burns <usenet@andyburns.uk
wrote:
Char Jackson wrote:
Andy Burns wrote:
When it happens, chop the lead in two with a vengeance and discard it, so you\'re
not tempted to re-use it later \"just temporarily\" ...
That seems drastic. I\'ve successfully used Ethernet cables where the
barb has fallen off, including one cable that has been barbless for a
number of years.
And then one day, someone is doing the hoovering, or kicks a desk, or a pet gets
round the back, and something stops working ... if you can retuerminate it with
a new plug, sure but patch cables are cheap, stuff not working is frequently
expensive ...
I suppose it could be annoying if a connection comes loose, but it\'s not
like it causes any damage. Just push the plug in and carry on, right? I
get your point, though. One of these years I\'ll probably replace my
barbless cables (or more likely just snip the connector and crimp a new
one). They\'re not causing any problems, though, so it could be a while.
On Mon, 26 Dec 2022 06:29:32 +0000, Andy Burns <usenet@andyburns.uk
wrote:
Char Jackson wrote:
Andy Burns wrote:
When it happens, chop the lead in two with a vengeance and discard it, so you\'re
not tempted to re-use it later \"just temporarily\" ...
That seems drastic. I\'ve successfully used Ethernet cables where the
barb has fallen off, including one cable that has been barbless for a
number of years.
And then one day, someone is doing the hoovering, or kicks a desk, or a pet gets
round the back, and something stops working ... if you can retuerminate it with
a new plug, sure but patch cables are cheap, stuff not working is frequently
expensive ...
I suppose it could be annoying if a connection comes loose, but it\'s not
like it causes any damage. Just push the plug in and carry on, right? I
get your point, though. One of these years I\'ll probably replace my
barbless cables (or more likely just snip the connector and crimp a new
one). They\'re not causing any problems, though, so it could be a while.
On Mon, 26 Dec 2022 21:34:34 GMT, scott@slp53.sl.home (Scott Lurndal)
wrote:
Ken Blake <Ken@invalid.news.com> writes:
On Mon, 26 Dec 2022 11:56:48 -0600, Char Jackson <none@none.invalid
wrote:
On Mon, 26 Dec 2022 05:05:36 -0500, Paul <nospam@needed.invalid> =
wrote:
The T368A and T368B thing is for rolled or straight-thru cabling.
If both ends of a cable are 568A, or if both ends are 568B, it\'s a
straight-through cable. If one end of a cable is 568A and the other =
end
is 568B, it\'s a crossover cable, what you call rolled, below.
Crossover cables are very rarely needed these days. All of mine are =
long
gone. What\'s important is to pick a wiring standard and stick with it.=
I
use 568B, but that\'s just personal preference and momentum.
https://www.truecable.com/blogs/cable-academy/t568a-vs-t568b
I can tell this, by noting the reversal of 1,2 3,6 on the two =3D
connectors
in the depiction.
1,2 to 1,2 Straight-thru (most all of my cables are like this)
3,6 to 3,6
1,2 to 3,6 Rolled cable (only one spare is like this, haven\'t=
=3D
used in some time)
3,6 to 1,2 (Could have blue boot on one end, red=
=3D
boot on other end of cable)
Any more info than that, you\'ll have to look up. A rolled cable
might be used between a broadband modem and a router. Straight cables
tend to be used from router to PC or switch to PC. Doing direct PC to=
=3D
PC,
uses a rolled cable (only if both ends are limited to 10/100BT NICs).
GbE equipment has MDI/MDIX which can deal with either straight or
rolled cabling.
I had never heard of 568A or 568B before. Short of taking it apart,
is it possible to tell which connector it is?
It\'s the same connector (RJ-45) for both.
Yes, I know. I guess my question wasn\'t clear.
568A/568B are the standards
for which wire goes to which contact in the (usually) female connector.
Yes, I understood that from Char\'s post,
(usually) female connector.
I thought (especially for crossover cable) that it was especially
pertinent to male connectors.
Cables (with male connectors) are typically wired straight through or
crossover (rare now).
Yes, I know. What I didn\'t know was that a crossover cable is one that
is connected 568A at one end and 568B at the other. I was asking
whether (and if so, how) I could tell whether the connections were
568A or 568B. I basically wanted to know that so I could tell whether
an old cable I might have lying around is a crossover cable.
On Mon, 26 Dec 2022 21:34:34 GMT, scott@slp53.sl.home (Scott Lurndal)
wrote:
Ken Blake <Ken@invalid.news.com> writes:
On Mon, 26 Dec 2022 11:56:48 -0600, Char Jackson <none@none.invalid
wrote:
On Mon, 26 Dec 2022 05:05:36 -0500, Paul <nospam@needed.invalid> =
wrote:
The T368A and T368B thing is for rolled or straight-thru cabling.
If both ends of a cable are 568A, or if both ends are 568B, it\'s a
straight-through cable. If one end of a cable is 568A and the other =
end
is 568B, it\'s a crossover cable, what you call rolled, below.
Crossover cables are very rarely needed these days. All of mine are =
long
gone. What\'s important is to pick a wiring standard and stick with it.=
I
use 568B, but that\'s just personal preference and momentum.
https://www.truecable.com/blogs/cable-academy/t568a-vs-t568b
I can tell this, by noting the reversal of 1,2 3,6 on the two =3D
connectors
in the depiction.
1,2 to 1,2 Straight-thru (most all of my cables are like this)
3,6 to 3,6
1,2 to 3,6 Rolled cable (only one spare is like this, haven\'t=
=3D
used in some time)
3,6 to 1,2 (Could have blue boot on one end, red=
=3D
boot on other end of cable)
Any more info than that, you\'ll have to look up. A rolled cable
might be used between a broadband modem and a router. Straight cables
tend to be used from router to PC or switch to PC. Doing direct PC to=
=3D
PC,
uses a rolled cable (only if both ends are limited to 10/100BT NICs).
GbE equipment has MDI/MDIX which can deal with either straight or
rolled cabling.
I had never heard of 568A or 568B before. Short of taking it apart,
is it possible to tell which connector it is?
It\'s the same connector (RJ-45) for both.
Yes, I know. I guess my question wasn\'t clear.
568A/568B are the standards
for which wire goes to which contact in the (usually) female connector.
Yes, I understood that from Char\'s post,
(usually) female connector.
I thought (especially for crossover cable) that it was especially
pertinent to male connectors.
Cables (with male connectors) are typically wired straight through or
crossover (rare now).
Yes, I know. What I didn\'t know was that a crossover cable is one that
is connected 568A at one end and 568B at the other. I was asking
whether (and if so, how) I could tell whether the connections were
568A or 568B. I basically wanted to know that so I could tell whether
an old cable I might have lying around is a crossover cable.
On Mon, 26 Dec 2022 21:34:34 GMT, scott@slp53.sl.home (Scott Lurndal)
wrote:
Ken Blake <Ken@invalid.news.com> writes:
On Mon, 26 Dec 2022 11:56:48 -0600, Char Jackson <none@none.invalid
wrote:
On Mon, 26 Dec 2022 05:05:36 -0500, Paul <nospam@needed.invalid> =
wrote:
The T368A and T368B thing is for rolled or straight-thru cabling.
If both ends of a cable are 568A, or if both ends are 568B, it\'s a
straight-through cable. If one end of a cable is 568A and the other =
end
is 568B, it\'s a crossover cable, what you call rolled, below.
Crossover cables are very rarely needed these days. All of mine are =
long
gone. What\'s important is to pick a wiring standard and stick with it.=
I
use 568B, but that\'s just personal preference and momentum.
https://www.truecable.com/blogs/cable-academy/t568a-vs-t568b
I can tell this, by noting the reversal of 1,2 3,6 on the two =3D
connectors
in the depiction.
1,2 to 1,2 Straight-thru (most all of my cables are like this)
3,6 to 3,6
1,2 to 3,6 Rolled cable (only one spare is like this, haven\'t=
=3D
used in some time)
3,6 to 1,2 (Could have blue boot on one end, red=
=3D
boot on other end of cable)
Any more info than that, you\'ll have to look up. A rolled cable
might be used between a broadband modem and a router. Straight cables
tend to be used from router to PC or switch to PC. Doing direct PC to=
=3D
PC,
uses a rolled cable (only if both ends are limited to 10/100BT NICs).
GbE equipment has MDI/MDIX which can deal with either straight or
rolled cabling.
I had never heard of 568A or 568B before. Short of taking it apart,
is it possible to tell which connector it is?
It\'s the same connector (RJ-45) for both.
Yes, I know. I guess my question wasn\'t clear.
568A/568B are the standards
for which wire goes to which contact in the (usually) female connector.
Yes, I understood that from Char\'s post,
(usually) female connector.
I thought (especially for crossover cable) that it was especially
pertinent to male connectors.
Cables (with male connectors) are typically wired straight through or
crossover (rare now).
Yes, I know. What I didn\'t know was that a crossover cable is one that
is connected 568A at one end and 568B at the other. I was asking
whether (and if so, how) I could tell whether the connections were
568A or 568B. I basically wanted to know that so I could tell whether
an old cable I might have lying around is a crossover cable.
On Mon, 26 Dec 2022 21:34:34 GMT, scott@slp53.sl.home (Scott Lurndal)
wrote:
(usually) female connector.
I thought (especially for crossover cable) that it was especially
pertinent to male connectors.
Cables (with male connectors) are typically wired straight through or
crossover (rare now).
Yes, I know. What I didn\'t know was that a crossover cable is one that
is connected 568A at one end and 568B at the other. I was asking
whether (and if so, how) I could tell whether the connections were
568A or 568B. I basically wanted to know that so I could tell whether
an old cable I might have lying around is a crossover cable.
On Mon, 26 Dec 2022 21:34:34 GMT, scott@slp53.sl.home (Scott Lurndal)
wrote:
(usually) female connector.
I thought (especially for crossover cable) that it was especially
pertinent to male connectors.
Cables (with male connectors) are typically wired straight through or
crossover (rare now).
Yes, I know. What I didn\'t know was that a crossover cable is one that
is connected 568A at one end and 568B at the other. I was asking
whether (and if so, how) I could tell whether the connections were
568A or 568B. I basically wanted to know that so I could tell whether
an old cable I might have lying around is a crossover cable.
On Mon, 26 Dec 2022 21:34:34 GMT, scott@slp53.sl.home (Scott Lurndal)
wrote:
(usually) female connector.
I thought (especially for crossover cable) that it was especially
pertinent to male connectors.
Cables (with male connectors) are typically wired straight through or
crossover (rare now).
Yes, I know. What I didn\'t know was that a crossover cable is one that
is connected 568A at one end and 568B at the other. I was asking
whether (and if so, how) I could tell whether the connections were
568A or 568B. I basically wanted to know that so I could tell whether
an old cable I might have lying around is a crossover cable.
On Mon, 26 Dec 2022 21:34:34 GMT, scott@slp53.sl.home (Scott Lurndal)
wrote:
Ken Blake <Ken@invalid.news.com> writes:
On Mon, 26 Dec 2022 11:56:48 -0600, Char Jackson <none@none.invalid
wrote:
On Mon, 26 Dec 2022 05:05:36 -0500, Paul <nospam@needed.invalid> wrote:
The T368A and T368B thing is for rolled or straight-thru cabling.
If both ends of a cable are 568A, or if both ends are 568B, it\'s a
straight-through cable. If one end of a cable is 568A and the other end
is 568B, it\'s a crossover cable, what you call rolled, below.
Crossover cables are very rarely needed these days. All of mine are long
gone. What\'s important is to pick a wiring standard and stick with it. I
use 568B, but that\'s just personal preference and momentum.
https://www.truecable.com/blogs/cable-academy/t568a-vs-t568b
I can tell this, by noting the reversal of 1,2 3,6 on the two =
connectors
in the depiction.
1,2 to 1,2 Straight-thru (most all of my cables are like this)
3,6 to 3,6
1,2 to 3,6 Rolled cable (only one spare is like this, haven\'t =
used in some time)
3,6 to 1,2 (Could have blue boot on one end, red =
boot on other end of cable)
Any more info than that, you\'ll have to look up. A rolled cable
might be used between a broadband modem and a router. Straight cables
tend to be used from router to PC or switch to PC. Doing direct PC to =
PC,
uses a rolled cable (only if both ends are limited to 10/100BT NICs).
GbE equipment has MDI/MDIX which can deal with either straight or
rolled cabling.
I had never heard of 568A or 568B before. Short of taking it apart,
is it possible to tell which connector it is?
It\'s the same connector (RJ-45) for both.
Yes, I know. I guess my question wasn\'t clear.
568A/568B are the standards
for which wire goes to which contact in the (usually) female connector.
Yes, I understood that from Char\'s post,
(usually) female connector.
I thought (especially for crossover cable) that it was especially
pertinent to male connectors.
Cables (with male connectors) are typically wired straight through or
crossover (rare now).
Yes, I know. What I didn\'t know was that a crossover cable is one that
is connected 568A at one end and 568B at the other. I was asking
whether (and if so, how) I could tell whether the connections were
568A or 568B. I basically wanted to know that so I could tell whether
an old cable I might have lying around is a crossover cable.
On Mon, 26 Dec 2022 21:34:34 GMT, scott@slp53.sl.home (Scott Lurndal)
wrote:
Ken Blake <Ken@invalid.news.com> writes:
On Mon, 26 Dec 2022 11:56:48 -0600, Char Jackson <none@none.invalid
wrote:
On Mon, 26 Dec 2022 05:05:36 -0500, Paul <nospam@needed.invalid> wrote:
The T368A and T368B thing is for rolled or straight-thru cabling.
If both ends of a cable are 568A, or if both ends are 568B, it\'s a
straight-through cable. If one end of a cable is 568A and the other end
is 568B, it\'s a crossover cable, what you call rolled, below.
Crossover cables are very rarely needed these days. All of mine are long
gone. What\'s important is to pick a wiring standard and stick with it. I
use 568B, but that\'s just personal preference and momentum.
https://www.truecable.com/blogs/cable-academy/t568a-vs-t568b
I can tell this, by noting the reversal of 1,2 3,6 on the two =
connectors
in the depiction.
1,2 to 1,2 Straight-thru (most all of my cables are like this)
3,6 to 3,6
1,2 to 3,6 Rolled cable (only one spare is like this, haven\'t =
used in some time)
3,6 to 1,2 (Could have blue boot on one end, red =
boot on other end of cable)
Any more info than that, you\'ll have to look up. A rolled cable
might be used between a broadband modem and a router. Straight cables
tend to be used from router to PC or switch to PC. Doing direct PC to =
PC,
uses a rolled cable (only if both ends are limited to 10/100BT NICs).
GbE equipment has MDI/MDIX which can deal with either straight or
rolled cabling.
I had never heard of 568A or 568B before. Short of taking it apart,
is it possible to tell which connector it is?
It\'s the same connector (RJ-45) for both.
Yes, I know. I guess my question wasn\'t clear.
568A/568B are the standards
for which wire goes to which contact in the (usually) female connector.
Yes, I understood that from Char\'s post,
(usually) female connector.
I thought (especially for crossover cable) that it was especially
pertinent to male connectors.
Cables (with male connectors) are typically wired straight through or
crossover (rare now).
Yes, I know. What I didn\'t know was that a crossover cable is one that
is connected 568A at one end and 568B at the other. I was asking
whether (and if so, how) I could tell whether the connections were
568A or 568B. I basically wanted to know that so I could tell whether
an old cable I might have lying around is a crossover cable.