Ethernet Cables?

Pete Turnbull pete at dunnington.u-net.com
Wed Dec 29 11:03:45 CST 2004


On Dec 29 2004, 10:29, John Allain wrote:
> RJ45 type cables also factored in with IBM's Token Ring
> connectivity.  There were adaptors, probably Baluns to go
> from the largish connectors to these.  This _could_ be one.

Not very likely, though.  I think Jim is more likely correct, that it's
a console cable or at least some sort of serial cable.  The colours
Marvin mentioned are often used for flat cable; baluns are for twisted
pairs.

Also, serial cables commonly use a scheme where the innermost two wires
(4,5) are ground, either side are receive and transmit (3,6), and
handshake lines DTR/DSR (or DCD) (2,7) and CTS/RTS (1,8) are at the
edges.  By that scheme, Marvin's cable would short DTR to DSR and RTS
to CTS, which makes sense.

-- 
Pete						Peter Turnbull
						Network Manager
						University of York



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