AS/400 9404 and TWINAX questions... - test-drb@ccmp.vtda.org

29 Sep 2004

On Sep 29 2004,  8:23, 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. 
ISDN S-bus sometimes uses flat cables for the last piece of flex
between wall and device (you shouldn't, because 1+2 and 7+8 are
sometimes used for phantom power, but many devices only use Tx and Rx
which are 4+5 and 3+6).

-- 
Pete						Peter Turnbull
						Network Manager
						University of York