AS/400 9404 and TWINAX questions...

From: Vintage Computer Festival <>
Date: Wed Sep 29 02:16:48 2004

On Wed, 29 Sep 2004, John Foust wrote:

> At 02:02 AM 9/29/2004, you wrote:
> >I've hardly ever seen a commercial standard Cat3 / Cat4 / Cat5 /Cat5e
> >cable that was miswired with split pairs. Telephone cables wired to
> >the old USOC standard are different[1], but not usually fitted with
> >RJ45 plugs, and flat cables are obviously not twisted pairs.
> I agree, and I suspect any straight-through RJ-45 cable
> was for a telephone system, not networking. Perhaps
> Sellam knows examples.

There were/are many uses for a straight-through 8-conductor cable with
RJ-45 connectors on each end. Lots of datacom equipment of old, old
telephone systems that used all 4 pairs, etc. Of course, these cables
would be used for the last few feet...the actual cable runs would have
twisted pairs.

Probably the biggest use for straight-through 8-conductor ribbon cable is
for serial communications.

Sellam Ismail                                        Vintage Computer Festival
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Received on Wed Sep 29 2004 - 02:16:48 BST

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