>> >In my (limited) experience, even if there's no official demarc,
>> >there's invariably a lightning protection block, with four or more
>> >screw terminals, cylindrical fuses, and a ground wire.
>> That block is, for all legal purposes, the demarc. ?You own the wiring
>> after it, they own the wiring before it.
>Ok, but how does it work if above "block" handles a group of dwelling
>units (as does the unit where I live)? I don't think it would be a
>good idea for individuals to be fooling around in a junction box that
>serves multiple customers.
Its totally up to the building owner how they deal with it. In most of
the bigger apartment buildings I've done work in, the telco will be in
(usually, sometimes forgotten to be) locked closets along with the
cable TV plant. Sometimes with some pretty beefy locks (ie. Medeco,
that I had to leave behind my drivers license to get the key from the
Smaller/older buildings may just have it somewhere in the ba*t, or
an outside NI box* out somewhere, maybe locked, probably not.
Its more of a matter of people don't usually mess with it because they
have no idea what they are looking at other than a bunch of wires
behind a door/inside a can/behind that panel, not even realizing they
could do a bunch of messing up people by messing with all the wires.
Plus the ones that could really mess with it and have punch down
tools, test sets, etc. could do the same sort of problem from
many places, not just one specific NI box somewhere.