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From: thomas@mvac23.UUCP (Thomas Lapp)
Newsgroups: sci.electronics
Subject: Info on LAN elec. chars. wanted
Message-ID: <360.UUL1.3#5131@mvac23.UUCP>
Date: 25 Sep 90 17:30:01 GMT
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I'm looking for information on the electrical characteristics
of various LAN protocols.  Can anyone provide the signal levels
for 
Token ring
Ethernet
AppleTalk
FDDI
?

I'm working with a project that, given some unknown wires, will tell
me what type of LAN is attached to those wires (assuming that you
can't see what's "behind the covers" -- like an ethernet cable, or
twisted pair).
                         - tom

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