Re: ethernet over a single pair of wires?

On Feb 4, 7:54 pm, "mook Johnson" <m...@xxxxxxxx> wrote:
I'm looking at an application where there is only one avaialble pair of
wires through an interface.  The wires are in a CAT-5 bundle but only 1 of
the twisted pair is avaiable.  The length is only about 200 ft.

The desired connetion is ethernet

The oldest, cruftiest of tricks is a pair of baluns and a
10base2 (thinwire) media for your link. This will require a
powered adapter box to serve a modern (10/100 or 10/100/1000
unshielded twisted pair) Ethernet jack. I'm not sure how
the terminator current sensing was handled, there may have
been some DC feedthrough added to the balun.

The modern way to do it on the cheap is to retask two pairs
in the CAT-5 for Ethernet and put a hub in so your distant
computer doesn't hog the connection. Then you have to replace one
of the cable's functional pairs with an Ethernet service of some sort.

There are lots of DSL 'last-mile' solutions too, but those, and
the Cisco and BlackBox solutions might be priced for industrial users.

There's only a 200 foot distance, eh? Have you considered
WiFi with aimed antennas?
.