Okay, I looked for info on my service and this is the most detailed info I found regarding why I don’t have nor can I use a modem.
Do You Need a Modem with an ONT? - Learn | Hitron Americas
Unlike a cable modem, FiOS does not use DOCSIS. Therefore, on a fiber-optic network you do not need a modem. You need an optical network terminal (ONT). Learn more.
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