There are a couple of isolated properties that this spine will pass that I tried to get included in the project but this was declined although they could have been included if we enlarged the CFP to cover a much bigger area. This I declined as being unmanageable. Whilst I appreciate one cannot just break into a fibre and pick up a twisted pair as would happen with copper, how will Openreach connect individual isolated properties?
Think of the FTTP design as a tree:
aggregation node --< splitter nodes --< CBTs
(root --< branches --< leaves)
The splitters are placed at locations in the FTTP design for that area, and each one covers a certain set of properties in its design footprint.
For the isolated properties: every one will be in the footprint of some splitter - which either already exists, or exists only on paper in a plan. The CBT(s) serving those properties will be connected back to that splitter, in a star arrangement.
If that splitter doesn't already exist, then that splitter will need to be installed, and a cable pulled to connect it back to its parent fibre aggregation node.
It's possible that part of the path back to the aggregation node is also taken by the cables to one or more other splitters. In that case, normally the cables will sit side by side in the same duct.
I believe that fibre now comes in various formats including armoured surround that does not need a duct or will every property need a mini duct of some sort that could have to run for miles?
Fibre cables can also be run between poles. If the existing telephony service uses directly buried cables (Direct-In-Ground / DIG) then it is common for Openreach to install poles for fibre, rather than dig new ducts.
However if the existing service to the property is via underground ducts, usually they would re-use those. Such underground service can usually be identified by footway boxes in the pavement every few properties.