It's likely a waste of time putting up a ladder to look at it, as anything wrong here will need to be rectified by BT/Openreach.I am interested in seeing does the line go into the loftspace for example?
The cable that comes through the window that the orange and white cores are visible in the photo should be the end of the drop wire from the pole.It does not scream out drop cable to me, where drop cable is usually black. It could just be painted overtime.
It would be best if a new master socket could be installed at this point, then new internal cable installed direct to a new socket where the router lives.I am not even sure if this is the correct entry point personally, the colours here do not seem to match with the master in the same way the old junction box seems too...
What seems logical is not always the correct answer with BT lines.