I'd update the router/modem (assuming they are one in the same)
You could be using an older 802.11 standard. You could be using an older modem that isn't using DOCSIS 3.0.
Personally, I like the Arris Surfboard
Crybaby Cripplecrow Hanging on a Monkey's Toe Club
Metrocast's infrastructure is HORRIBLE! I have had them out 2 times already this year and 4 times in the last 6 months because of connection issues. Every time it has been either at the junction that feeds my street or the hub that feeds the neighborhood.
They insist that it has nothing to do with the antiquated cabling system that they use but it seems funny that these issues always seem to follow a weather event (i.e. snow, heavy rain, etc.)