Using VoIP Phone system is like you would use any telephone. Step 1: pick up the phone. Step 2: wait for the dial tone. Step 3: dial the desired number. So, on the user end, it's exactly the same with landline and much more cost effective. Plain and simple.
On the technology end, it is totally different infrastructure. VoIP phone system utilizes your home or business internet connection to make calls while sharing the same internet connection for browsing or checking your emails. When you sign up for voip phone system service, most providers would provide you with a phone adapter, which you connect one end to the phone and the other end to your internet router. On top of that, you can also use your computer and a headset to make voip phone calls using provided software without any other equipment.
VoIP Phone system these days typically include many advanced features such as voice2email, findmefollowme, call-waiting, etc...without additional cost. Find the voip phone system that suit your lifestyle or business by comparing plans and users reviews.
The following diagram shows how Voip phone system works.

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