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From: SNELSON@STL-HOST1.ARPA.UUCP
Newsgroups: comp.dcom.telecom
Subject: ISDN
Message-ID: 
Date: Mon, 23-Nov-87 08:57:00 EST
Article-I.D.: SIMTEL20.KPETERSEN.12352918475.BABYL
Posted: Mon Nov 23 08:57:00 1987
Date-Received: Sun, 6-Dec-87 21:54:27 EST
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
Lines: 16
Approved: telecom@xx.lcs.mit.edu

I WOULD LIKE TO START SOME DIALOG ON ISDN. MY FIRST PARTICULAR HANG
UP IS WITH THE WIRING SCHEME. 6 OF THE 8 CONDUCTORS TO AN RJ45 TYPE
JACK ARE ASSIGNED (B+D). I WOULD LIKE TO SEE THE UNASSIGNED ASSIGNED
AS POWER -12V TO +12V TO POWER EQUIPMENT. TO MANY OF THE NEW NETWORKING
SCHEMES REQUIRE POWER OUTLETS TO MATCH COMM EQUIPMENT HANGING ON THE
END OF THE WIRE.

ANOTHER THING I THINK SHOULD BE LOOKED AT IN MORE DETAIL IS POWER AND
ESPECIALLY GROUNDING. FIPS 94 IS POSSIBLY THE BEST DOCUMENT WRITTEN TO
DATE ON THIS SUBJECT AND A LOT OF THINGS I SEE BEING TALKED ABOUT SEEM
TO BE RELATED TO NOISE DUE TO IMPROPER GROUNDING TECHNIQUES, ESPECIALLY
IN DIGITAL SWITCHING, BUT I HESITATE TO START THROWING STONES ABOUT THIS
SINCE I WOULD NOT HAVE THE VAGUEST IDEA OF HOW SOMEONES PLANT WAS WIRED.

REGARDS,
STEVE