In apartment, condo, and co-op multi-family buildings there is often no individual "demarc" box for individual units. Rather, the lines consolidate in large junction boxes which are maintained by the telco. All an individual unit has is a plain phone jack.
In the event there is trouble on the line where is the 'cut off' point to determine responsibility for repair? To the subscriber, the cut off point would appear to be in their own apt since they obviously don't have (nor should have) access to the central junction box.
Thanks.
(Any other information about line maintenance in multi-family housing would be appreciated.)