VoIP (Voice over Internet Protocol) allows your phone calls to be routed to your telephones through the Internet, effectively eliminating your need for a phone company. VoIP works just like any regular telephone while giving you even greater accessibility.
VoIP works by taking analog audio signals, the voices and sounds you hear while talking on the phone, and turns them into digital data so that it can be transmitted over the Internet. It doesn’t make voices sound any different, it just sends audio to your earpiece in a different way. So instead of plugging your phone into the phone jack like you would normally, you will connect your phone to either a modem or router via an Ethernet cable.
Because VoIP services use the Internet instead of going through a telephone provider, you can essentially make free phone calls. If you decide to move your office or need to take your work phone with you, you can easily do so by plugging your phone into a modem or router. Now you can make or receive calls and voicemails, and use the same phone number.