Vet Tech wrote:

Question now, as you might expect, is how does one get round this as
the cable has to be cut and extended so that it can re re-routed?

I don't know how sophisticated the "anti tamper" is - if its just a 12V
hold off without any clever cable impedance change detection, then it
sounds trivial to defeat.

Decide where you want the new cable to go and install it - leaving ends
close to exiting cable. Strip the outer sheath of the existing cable
adjacent to new cable ends, and join using a suitable terminal box[1].
Repeat at other end, now remove unwanted cable section[2]

[1] You could do a temporary bridge using a pair of IDC RJ45 sockets and
a patch lead, or alternatively go for the final solution in one go. I
would use something like:

http://cpc.farnell.com/jsp/search/pr...questid=758678

Install one at each connection point, and bridge enough terminals with
the new cable. Now strip the outer sheath from the existing cable
without disturbing the wires. Punch these down into the individual
terminals. At this point you should now have two parallel paths of
connection, and the original wires can be cut and removed. At no time
will the circuit have been interrupted.

[2] Don't just cut in one action as this could temporarily short the
wires - cut each wire separately.

--
Cheers,

John.

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