Hobby Electronics Basics Crossover firewire cable

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Subject Author Date
Crossover firewire cable Ray 09-30-05
Posted by Ray on September 30, 2005, 10:44 pm
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There are two types of firewire cables: Straight-through and crossover.
Which one is the most common and what are they for? Your guidance is
appreciated.

Thanks,

Ray




Posted by Rich Grise on September 30, 2005, 1:25 pm
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On Fri, 30 Sep 2005 22:44:56 +0800, Ray wrote:

> There are two types of firewire cables: Straight-through and crossover.
> Which one is the most common and what are they for? Your guidance is
> appreciated.

Even though there is only one type of connector used, there are two
kinds of ethernet ports - for lack of a better term, "client" and
"server". Your DSL modem has a "server" jack, as do routers, hubs,
and switches. Your built-in ethernet jack, and any add-on cards,
(except a "router" card) are "client" style. If you have two
computers _without_ any hubs, switches, or routers, and want
to connect their ordinary "client" style ethernet ports together,
you use a crossover cable, so that each "client" thinks the other
is a "server".

Hope This Helps!
Rich




Posted by Impmon on September 30, 2005, 1:50 pm
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>Even though there is only one type of connector used, there are two
>kinds of ethernet ports
[snip]

And how this relates to Firewire? Just had to ask since the original
question is refering to Firewire cable and which type is more common.
--
When you hear the toilet flush, and hear the words "uh oh", it's already
too late. - by anonymous Mother in Austin, TX
To reply, replace digi.mon with phreaker.net

Posted by Rich Grise on September 30, 2005, 5:13 pm
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On Fri, 30 Sep 2005 13:50:40 -0400, Impmon wrote:

>
>>Even though there is only one type of connector used, there are two
>>kinds of ethernet ports
> [snip]
>
> And how this relates to Firewire? Just had to ask since the original
> question is refering to Firewire cable and which type is more common.

OOps! OK, what's "firewire"? I'm guessing it's pretty much the same
deal with the cables, just from the context - there's a "straight-
through" and a "crossover" - it makes me think of the null modem
cables from days of yore.

OK, I've looked up "Firewire", and it uses hubs, so if they make
crossover cables, it must be to connect two devices without using
a hub. Call it a "null hub", maybe. :-)

Thanks,
Rich


Posted by Ray on October 1, 2005, 12:09 pm
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Rich,

I note that the external hard disk, dvd writer, etc., normally have two
firewire ports and requires a crossover cable to connect from pc to them and
some other device, i.e., iPod docking, that has one firewire port on it and
requires straight-through cable. When I buy the firewire cable, it seems
the shops do not know what type of cables they are selling, unlike CAT5
cable that normally marked on the packaging.

It leads me to find out if there are two types of cable readily available on
the market or iPod docking device accompanying cable is custom-made one. I
am unsure if the same technology of CAT5 cable is applied to firewire as
well. Your guidance is appreciated.

Thanks,

Ray

> On Fri, 30 Sep 2005 13:50:40 -0400, Impmon wrote:
>
>>
>>>Even though there is only one type of connector used, there are two
>>>kinds of ethernet ports
>> [snip]
>>
>> And how this relates to Firewire? Just had to ask since the original
>> question is refering to Firewire cable and which type is more common.
>
> OOps! OK, what's "firewire"? I'm guessing it's pretty much the same
> deal with the cables, just from the context - there's a "straight-
> through" and a "crossover" - it makes me think of the null modem
> cables from days of yore.
>
> OK, I've looked up "Firewire", and it uses hubs, so if they make
> crossover cables, it must be to connect two devices without using
> a hub. Call it a "null hub", maybe. :-)
>
> Thanks,
> Rich
>



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