If you read the above blog posts, you might come to the logical path that cable path is different to each apartment and therefore no dependencies. However this is not entirely true. Lets look at how the conduits are terminating in the shaft:
For a given floor something like above illustration is what a service provider field staff sees when trying to give a service to any apartment. A cluster of conduit ends. Assume that all flats in a particular floor are occupied (it will be the case with all floors a year or two down the line).
The SP field staff is faced with an question that "which conduit goes to the flat" which he is interested to connect or disconnect or simply "which conduit belongs to which flat". Their is no standard way these ends are organized.
The way this is currently resolved is that each of these conduits have a metal wire (GI wire) which they tug with a little force and observe if the cable in the apartment of interest moves a bit. If it does not, tug the next one till you get a tug to move the flat's wires. This is a hit and trial method. Unfortunately in this hit-and-trial tugging method, cables/terminations of the neighboring flat can be accidentally damaged.
Symptoms
My neighbor changed his internet ISP (or added a new one) or a new resident moved in my floor and I lost my internet connection for no fault if mine. I can neither penalize my neighbor or ISP staff and have to bear perhaps a day of outage, pay some contract labor Rs. 500/- to Rs. 750/- for fixing this and pay additional cost in some cases for new cable. This can randomly happen anytime during your residency in the apartment (consider your lucky if you do not face this).
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