So if this ‘IJ’ is simply a point at which a fibre cable meets another fibre cable to extend the connectivity along a route ( a cable into the IJ spliced to a cable , or cables going out ) , it’s proximity to your address is irrelevant, it’s part of a network that isn’t designed to include your property, it just happens that it runs past your property.
As far as your neighbour with Plusnet asking Openreach to get them FTTP , that’s not the case , there is no mechanism for that , there is a product, FTTPod ,( fibre to the premises on demand) where a customer ( if they are prepared to pay for the network to be constructed ) can get a themselves connected to FTTP , this is very expensive and it’s an Openreach product that Plusnet don’t offer , so cannot be how your neighbour was connected , unless they initially used an ISP that does offer FTTPod ( like Cerberus ) and when the minimum term expired they migrated to Plusnet , ( like any other ‘native’ FTTP customer, FTTPod customers are treated up just like ordinary FTTP after the minimum term )
The chances are that your neighbour just happened to be within an area that Openreach provided FTTP for , and you are not in that area .
