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are crossover cables usually black?

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  are crossover cables usually black? "Orson Cart" <ex-privat@parts.org> - 2011-07-10 16:43 +0100
    Re: are crossover cables usually black? Dan C <youmustbejoking@lan.invalid> - 2011-07-10 14:58 +0000
    Re: are crossover cables usually black? David Brown <david.brown@removethis.hesbynett.no> - 2011-07-10 20:56 +0200
      Re: are crossover cables usually black? Ivan Shmakov <ivan@gray.siamics.net> - 2011-07-11 16:05 +0700
        Re: are crossover cables usually black? David Brown <david@westcontrol.removethisbit.com> - 2011-07-11 11:33 +0200
          Re: are crossover cables usually black? Ivan Shmakov <ivan@gray.siamics.net> - 2011-07-11 18:30 +0700
      Re: are crossover cables usually black? Grant Edwards <invalid@invalid.invalid> - 2011-07-11 14:23 +0000
        Re: are crossover cables usually black? Allodoxaphobia <knock_yourself_out@example.net> - 2011-07-11 21:29 +0000
          Re: are crossover cables usually black? "Charlie Gibbs" <cgibbs@kltpzyxm.invalid> - 2011-07-14 12:01 -0800
            Re: are crossover cables usually black? Rick Jones <rick.jones2@hp.com> - 2011-07-14 22:38 +0000

#394 — are crossover cables usually black?

I bought a couple of ethernet crossover cables 10 years ago, which
were black.  I had a look in catalogues of local suppliers in my city,
and they have Cat5/6 patch cables in red, blue, yellow and grey,
while the crossover cable is only in Henry Ford black.
Now sorting out the spares shelf, I found another black cable that
is not crossover - it probably came with some used equipment that
I acquired; can't remember from where.

Does the colour mean anything?

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#395

On Sun, 10 Jul 2011 16:43:14 +0100, Orson Cart wrote:

> I bought a couple of ethernet crossover cables 10 years ago, which were
> black.  I had a look in catalogues of local suppliers in my city, and
> they have Cat5/6 patch cables in red, blue, yellow and grey, while the
> crossover cable is only in Henry Ford black. Now sorting out the spares
> shelf, I found another black cable that is not crossover - it probably
> came with some used equipment that I acquired; can't remember from
> where.
> 
> Does the colour mean anything?

No.  Color means nothing.


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#396

On 10/07/11 17:43, Orson Cart wrote:
> I bought a couple of ethernet crossover cables 10 years ago, which
> were black.  I had a look in catalogues of local suppliers in my city,
> and they have Cat5/6 patch cables in red, blue, yellow and grey,
> while the crossover cable is only in Henry Ford black.
> Now sorting out the spares shelf, I found another black cable that
> is not crossover - it probably came with some used equipment that
> I acquired; can't remember from where.
>
> Does the colour mean anything?

Colour of the cable means nothing - you have to check the ordering of 
the wires inside the plug (or, if you're lucky, the cables themselves 
are labelled).

If you are connecting to a switch, then it doesn't matter if you use a 
cross-over cable or a straight-through cable, as the switch will adapt 
automatically.

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#397

>>>>> David Brown <david.brown@removethis.hesbynett.no> writes:

[...]

 > If you are connecting to a switch, then it doesn't matter if you use a
 > cross-over cable or a straight-through cable, as the switch will adapt
 > automatically.

	Won't a typical NIC do the same?

	I don't remember that I've had to bother about the straightness
	of the cable since the days of 10BASE-T.

-- 
FSF associate member #7257

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#398

On 11/07/2011 11:05, Ivan Shmakov wrote:
>>>>>> David Brown<david.brown@removethis.hesbynett.no>  writes:
>
> [...]
>
>   >  If you are connecting to a switch, then it doesn't matter if you use a
>   >  cross-over cable or a straight-through cable, as the switch will adapt
>   >  automatically.
>
> 	Won't a typical NIC do the same?
>
> 	I don't remember that I've had to bother about the straightness
> 	of the cable since the days of 10BASE-T.
>

Some NICs will, some won't.  I think all Gb NICs are auto-switching, but 
it's not the case with all 100 Mb NICs.  You don't normally have to 
think about cross-over or straight-through cables since one end is 
typically connected to a switch.

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#399

>>>>> David Brown <david@westcontrol.removethisbit.com> writes:
>>>>> On 11/07/2011 11:05, Ivan Shmakov wrote:
>>>>> David Brown <david.brown@removethis.hesbynett.no> writes:

[...]

 >>> If you are connecting to a switch, then it doesn't matter if you
 >>> use a cross-over cable or a straight-through cable, as the switch
 >>> will adapt automatically.

 >> Won't a typical NIC do the same?

 >> I don't remember that I've had to bother about the straightness of
 >> the cable since the days of 10BASE-T.

 > Some NICs will, some won't.  I think all Gb NICs are auto-switching,
 > but it's not the case with all 100 Mb NICs.

	Well, at least Wikipedia [1] seems to confirm this point.

[1] http://en.wikipedia.org/wiki/Auto-MDIX#Auto-MDIX

 > You don't normally have to think about cross-over or straight-through
 > cables since one end is typically connected to a switch.

	Indeed.

-- 
FSF associate member #7257

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#400

On 2011-07-10, David Brown <david.brown@removethis.hesbynett.no> wrote:
> On 10/07/11 17:43, Orson Cart wrote:
>> I bought a couple of ethernet crossover cables 10 years ago, which
>> were black.  I had a look in catalogues of local suppliers in my city,
>> and they have Cat5/6 patch cables in red, blue, yellow and grey,
>> while the crossover cable is only in Henry Ford black.
>> Now sorting out the spares shelf, I found another black cable that
>> is not crossover - it probably came with some used equipment that
>> I acquired; can't remember from where.
>>
>> Does the colour mean anything?
>
> Colour of the cable means nothing - you have to check the ordering of 
> the wires inside the plug (or, if you're lucky, the cables themselves 
> are labelled).
>
> If you are connecting to a switch, then it doesn't matter if you use a 
> cross-over cable or a straight-through cable, as the switch will adapt 
> automatically.

Most newer switches will.  I have switches that won't.

-- 
Grant Edwards               grant.b.edwards        Yow! Did something bad
                                  at               happen or am I in a
                              gmail.com            drive-in movie??

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#401

On Mon, 11 Jul 2011 14:23:49 +0000 (UTC), Grant Edwards wrote:
> On 2011-07-10, David Brown <david.brown@removethis.hesbynett.no> wrote:
>> On 10/07/11 17:43, Orson Cart wrote:
>>> I bought a couple of ethernet crossover cables 10 years ago, which
>>> were black.  I had a look in catalogues of local suppliers in my city,
>>> and they have Cat5/6 patch cables in red, blue, yellow and grey,
>>> while the crossover cable is only in Henry Ford black.
>>> Now sorting out the spares shelf, I found another black cable that
>>> is not crossover - it probably came with some used equipment that
>>> I acquired; can't remember from where.
>>>
>>> Does the colour mean anything?
>>
>> Colour of the cable means nothing - you have to check the ordering of 
>> the wires inside the plug (or, if you're lucky, the cables themselves 
>> are labelled).
>>
>> If you are connecting to a switch, then it doesn't matter if you use a 
>> cross-over cable or a straight-through cable, as the switch will adapt 
>> automatically.
>
> Most newer switches will.  I have switches that won't.

And, I've used a switch that used a switch.  heh...
It had a slide switch near the port that went to the router -- 
positionally labeled thus:  "=" and "x".

Jonesy
-- 
  Marvin L Jones    | jonz          | W3DHJ  | linux
   38.24N  104.55W  |  @ config.com | Jonesy |  OS/2
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#407

In article <slrnj1mqq8.2flc.knock_yourself_out@shell.config.com>,
knock_yourself_out@example.net (Allodoxaphobia) writes:

> On Mon, 11 Jul 2011 14:23:49 +0000 (UTC), Grant Edwards wrote:
>
>> On 2011-07-10, David Brown <david.brown@removethis.hesbynett.no>
>> wrote:
>>
>>> On 10/07/11 17:43, Orson Cart wrote:
>>>
>>>> I bought a couple of ethernet crossover cables 10 years ago, which
>>>> were black.  I had a look in catalogues of local suppliers in my
>>>> city, and they have Cat5/6 patch cables in red, blue, yellow and
>>>> grey, while the crossover cable is only in Henry Ford black.
>>>> Now sorting out the spares shelf, I found another black cable that
>>>> is not crossover - it probably came with some used equipment that
>>>> I acquired; can't remember from where.
>>>>
>>>> Does the colour mean anything?
>>>
>>> Colour of the cable means nothing - you have to check the ordering
>>> of the wires inside the plug (or, if you're lucky, the cables
>>> themselves are labelled).
>>>
>>> If you are connecting to a switch, then it doesn't matter if you use
>>> a cross-over cable or a straight-through cable, as the switch will
>>> adapt automatically.
>>
>> Most newer switches will.  I have switches that won't.
>
> And, I've used a switch that used a switch.  heh...
> It had a slide switch near the port that went to the router --
> positionally labeled thus:  "=" and "x".

Wow, that sounds like a barebones RS-232 cable I once built.
I fitted a small DPDT switch into one of the end shells to
swap the TxD and RxD lines and turn it into a null modem.

Oh, and BTW my crossover cable is blue with red connectors.

-- 
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#408

Charlie Gibbs <cgibbs@kltpzyxm.invalid> wrote:
> Oh, and BTW my crossover cable is blue with red connectors.

Orange here.

rick jones
-- 
The computing industry isn't as much a game of "Follow The Leader" as
it is one of "Ring Around the Rosy" or perhaps "Duck Duck Goose." 
                                                    - Rick Jones
these opinions are mine, all mine; HP might not want them anyway... :)
feel free to post, OR email to rick.jones2 in hp.com but NOT BOTH...

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