From the article, it sounds like the "default" option is for the customer to supply their own router, which I appreciate:
> Prime-One provides a modem and the ONT, plus a Wi-Fi router if the customer prefers not to use their own router.
My fiber installer referred to the Adtran 632V ONT he installed as the "modem".
He installed two other junction boxes (one outside the house near/under where the fiber attaches to the wall of the house, one inside near the ONT) but they're just passive optical couplers allowing them to swap out fiber segments in the event of fiber damage without re-running the entire install.
As far as I know, nobody uses separate boxes for the modem and router, that kind of thinking died when wifi became more widespread and included by default with ISP plans.
Definitely splitting hairs here though on terminology.