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Yes, if your fiber optic router has an ethernet port, this router can be connected.
Sorry, there was a problem. Please try again later.No, you can not connect the Fiber directly to this router. You still need the ATT Modem and then you get an Ethernet cable to connect the modem to the Asus Router. Sadly ATT modems won't allow you to put it in bridge mode. Yet you can disable the WiFi in the ATT Modem to avoid interference and use the WiFi from the Router.
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