If you intend to use Time Warner Internet or Cable network then you have to get one of the Time Warner approved modems for the purpose. Or else you may not be able to access their network. Such approval is absolutely necessary when in anticipation of faster and better access you decide to use your personal modem that is a third party product.
There are Time Warner Approved Modems in the Market
Good news for you is that there are some third party provided Time Warner approved modems in the market. Examples are cable modem offered by ARRIS, NETGEAR, DOCSIS, and a few others. These modems are approved by Time Warner and work well with their service Gateway. While subscribing to one of the data plans offered by Time Warner Cable or TWC the user is presented with three basic options. The first one is Internet only, the second one is Internet and TV, and the third one is Internet, TV, and phone. In any case; the use of compatible modem is indispensable.
Why You Should buy own Modem?
Like in case of Time Warner you will also need the Comcast approved modem to access their network services. The question is why buy own modem for accessing Time Warner or Comcast services? The reason is that having your own modem gives you independence as well as economy because you dispense with the necessity of paying company modem rental bills with taxes and surcharges to be paid. In addition; it also cuts down on the monthly charges to be paid to the service provider.
Only necessity for you is to find genuine Time Warner or Comcast approved modems and only a reliable provider can give you one.