Abbreviation for
demarcation point:
Interface between customer-premises equipment and network service provider equipment. For residential
telephone or
cable television, this is a small
junction box or
ground block which delimits the
threshold between '
Your Problem' and '
Their Problem'. I t will usually be located near your
electric utility meter or
circuit breaker panel.
Before calling the utility's service technician, take a known good device to the demarcation point, unhook 'your' side's wiring and hook up the test device (nothing else) to 'their side' (You may need alligator clips). If it stills doesn't work, it's 'their problem', otherwise it's 'Your Problem', don't bother calling them unless you want to pay the utility to fix your house wiring.