Using internet protocol instead of using a traditional telephone line keeps the cost of communication down.
In the event of an internet outage calls can be forwarded on to a mobile or laptop (using 3G or 4G tethering) so customers can still reach you
VoIP phones come with a range of features which enhance productivity, such as easy forwarding of voicemails
If you ever move offices or if you change your office layout, users will retain their extension numbers after they move desks to allow consistency
Any internet connection with at least 100kbps (upload & download).
Yes, a range of hands-free devices can be used with VoIP phones.
No you can have it set up so you can just use the phone.