didn’t Verizon overbuild most, if not all, of the area with FiOS? not sure how they’re getting away with it in the rural regions unless there are still CLECs operating. All this to say… fiber still has the issue of power outages and nonfunctioning customer backup batteries in the ONTs and I vaguely remember some drama over Verizon not offering replacement batteries or providing backups at all.
hard to say for sure, but U109 and U208 could be UART into those Cisco baseband or radio chips. one placement for the 2.4 GHz (G) and 5 GHz (A), respectively. would be interesting to probe around there and see if you get a serial interface to it… obviously for extra credit ;-)