He presented it to me at the door the day I got back. It's great. Now I can see where I need to put my own aggregation point (bottom right of the communal property) in order to get back to the exchange in the most efficient way.
There is, however, still some confusion over who actually owns the conduit. My neighbor was able to dig up some information from the original builder but it is information already had (Article 14: Passage de Canalisations). It is fairly clear that even if we don't own it we have a right to have the communal antenna (RF over fiber on the second pair) in the conduit.
He gave me the name of his contact at France Telecom and I'll follow up with him this week.