clark@beaver.cs.washington.edu> (03/15/90)
Someone asked recently here about local station wiring for ISDN. Here
in my office there is some remodeling going on currently involving the
same. ATT is installing several new drops for ATT 7500 series ISDN
sets and rather than use the plain four pair cable that they use for
the 2500 sets ( for the poens ), they are using a shielded type cable.
I have a piece here and it reads:
TENSOLITE (SJ) CL2P 150'C 24 AWG (UL)
What I find strange about this stuff is the color coding...
There are four pairs: RED - BLACK
GREEN - BLACK
BLUE - BLACK
WHITE - BLACK
( the shield surrounds the whole bundle )
The only way to identify the BLACK conductors is to find which color
they are twisted with. I think I perfer the scheme where a colored
cond. is paired with a white cond. with that same color stripe on it.
In addition, the conductors are stranded, rather than the conventional
solid.
Hope that this helps whomever needs it.
Roger Swann | uucp: uw-beaver!ssc-vax!clark
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The Boeing Company |