What kind of functionality can a VoIP provide?

Answer 1

SIP and VOIP phones are essentially the same thing. They enable people to make voice or video calls across the internet for free, or for a lot less than long distance or international phone calls made through the telephone companies.

Answer 2

The ability to transmit more than one telephone call over the same broadband connection. This can make VoIP a simple way to add an extra telephone line to a home or office.

Conference calling, call forwarding, automatic redial, and caller ID; zero- or near-zero-cost features that traditional telecommunication companies normally charge extra for.

Secure calls using standardized protocols. Location independence. Only an Internet connection is needed to get a connection to a VoIP provider. Integration with other services available over the Internet. Advanced telephony features such as call routing, computer screen pops, and IVR implementations are easier and cheaper.