Time Capsule as a Router
In place of the cable company's internet router, can I use my time capsule to be a router?
AirPort Extreme 802.11n (5th Gen)
The Time Capsule can perform as a router, but not a modem. If what your cable company provided you is a simple modem, then the Time Capsule will work. However, if they actually provided you with a combination modem and router, also known as a gateway device, then the it wouldn't.