Confused about Gigablast modem
I am having the Fiber optic Gigablast (960mbps) installed in a couple of weeks. I have the Fiber ran to the house and have an appointment in early september. Here is my confusion, the phone rep informed me about needing a cable modem with a Docsis 3.1 to met the standards for the GiG but when I when to the store the rep said I don't even need a cable modem as long as I have a Router with GiG capability. The store rep stated the installation would come with a box (which I don't have to pay for, scary) that converts the sign from the fiber optic so that the router can use it and no modem needed. What which is it modem or no modem.....installation $100. Please clear up my confusion...my current modem (CM600) will need to be replaced if I need a modem.
thank you in advance,