Ther are two types of VoIP, one that requires VoIP modem and one that is through web user interface account. It doesn't matter whether it is a cable modem or an ADSL modem.
To connect to the internet you need to first buy an internet connection. You must then plug your internet cable into a router. Finally you must have connection to the router from your PC, most...
Yes, if the cable modem provider has Internet enabled, and you have an agreement with the cable provider to access the Internet this way. A special splitter is required to separate the Internet...