Question: IS a Null Modem Cable the same as a Laplink Cable?

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Previously Yikes!ItsIke <Yikes!ItsIke@younameit.com> wrote:
> Is a Null modem cable the same as a laplink cable?
> If not, whats the difference?

Haha, good question! Unfortunalely there is no correct answer.
The problem is that there are different ways to connect the
handshaking lines. All these can be called a "null-modem cable".
All might be called a "laplink cable" by some vendor or other.

If you use software hanshaking, all should work. With hardware
handshaking, it depends. Easiest way is to try.

Arno
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Hi Paul, Arno

On Sat, 25 Sep 2004 23:19:42 UTC, Arno Wagner <me@privacy.net> wrote:

> > Is a Null modem cable the same as a laplink cable?
> > If not, whats the difference?
>
> Haha, good question! Unfortunalely there is no correct answer.
> The problem is that there are different ways to connect the
> handshaking lines. All these can be called a "null-modem cable".
> All might be called a "laplink cable" by some vendor or other.

That comment is directed at SERIAL cables only I would say.

The "Laplink cable" which was some defacto-standard years ago
was actually a cable for the parallel port on PC's that implemented
bi-directional capabilities using 4-bits in each direction.

So, this is definately NOT the same thing or compatible
with regular serial NULL-MODEM cables.
(allthough the Laplink data-transfer program could use these as well
:)

Laplink cables used to be available from computer stores,
perhaps they still are.


A wire diagram for such a cable can be found in the document at:

http://www.dfsee.com/lptool/lptool.txt

Which is the user-guide for a data-transfer utility I once
made that uses that cable.

Regards, JvW

--
Jan van Wijk; Author of DFSee: http://www.dfsee.com
 
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Archived from groups: comp.sys.ibm.pc.hardware.storage (More info?)

Laplink Used Serial as well as parallel.


"Jan van Wijk" <jvw.no.spam@dfsee.com> wrote in message
news:W1d6fUB5m4qH-pn2-ddxrZ7nk4Wd5@merlin...
> Hi Paul, Arno
>
> On Sat, 25 Sep 2004 23:19:42 UTC, Arno Wagner <me@privacy.net> wrote:
>
>> > Is a Null modem cable the same as a laplink cable?
>> > If not, whats the difference?
>>
>> Haha, good question! Unfortunalely there is no correct answer.
>> The problem is that there are different ways to connect the
>> handshaking lines. All these can be called a "null-modem cable".
>> All might be called a "laplink cable" by some vendor or other.
>
> That comment is directed at SERIAL cables only I would say.
>
> The "Laplink cable" which was some defacto-standard years ago
> was actually a cable for the parallel port on PC's that implemented
> bi-directional capabilities using 4-bits in each direction.
>
> So, this is definately NOT the same thing or compatible
> with regular serial NULL-MODEM cables.
> (allthough the Laplink data-transfer program could use these as well
> :)
>
> Laplink cables used to be available from computer stores,
> perhaps they still are.
>
>
> A wire diagram for such a cable can be found in the document at:
>
> http://www.dfsee.com/lptool/lptool.txt
>
> Which is the user-guide for a data-transfer utility I once
> made that uses that cable.
>
> Regards, JvW
>
> --
> Jan van Wijk; Author of DFSee: http://www.dfsee.com
 
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Archived from groups: comp.sys.ibm.pc.hardware.storage (More info?)

Previously Falco <johnyfalco@bigfoot.com> wrote:
> Laplink Used Serial as well as parallel.


Yes, true. I completely forgot about the parallel variant.

Arno


> "Jan van Wijk" <jvw.no.spam@dfsee.com> wrote in message
> news:W1d6fUB5m4qH-pn2-ddxrZ7nk4Wd5@merlin...
>> Hi Paul, Arno
>>
>> On Sat, 25 Sep 2004 23:19:42 UTC, Arno Wagner <me@privacy.net> wrote:
>>
>>> > Is a Null modem cable the same as a laplink cable?
>>> > If not, whats the difference?
>>>
>>> Haha, good question! Unfortunalely there is no correct answer.
>>> The problem is that there are different ways to connect the
>>> handshaking lines. All these can be called a "null-modem cable".
>>> All might be called a "laplink cable" by some vendor or other.
>>
>> That comment is directed at SERIAL cables only I would say.
>>
>> The "Laplink cable" which was some defacto-standard years ago
>> was actually a cable for the parallel port on PC's that implemented
>> bi-directional capabilities using 4-bits in each direction.
>>
>> So, this is definately NOT the same thing or compatible
>> with regular serial NULL-MODEM cables.
>> (allthough the Laplink data-transfer program could use these as well
>> :)
>>
>> Laplink cables used to be available from computer stores,
>> perhaps they still are.
>>
>>
>> A wire diagram for such a cable can be found in the document at:
>>
>> http://www.dfsee.com/lptool/lptool.txt
>>
>> Which is the user-guide for a data-transfer utility I once
>> made that uses that cable.
>>
>> Regards, JvW
>>
>> --
>> Jan van Wijk; Author of DFSee: http://www.dfsee.com



--
For email address: lastname AT tik DOT ee DOT ethz DOT ch
GnuPG: ID:1E25338F FP:0C30 5782 9D93 F785 E79C 0296 797F 6B50 1E25 338F
"The more corrupt the state, the more numerous the laws" - Tacitus
 
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