VoIP ( Voice over IP) telephony: a way of sending voice calls over the Internet using either a software or a hardware telephone

Advantages

  costs 

phone service via VoIP is free or costs less than traditional phone

 functionality 

free phone numbers for use with VoIP are available in the USA, UK and other countries. Video calls, billing online, audio conferencing and many more posibilities.

 mobility 

subscribers of phone-line replacement services can make and receive local phone calls regardless of their location

Voip Gateway +  VOIP-IN number + Installation from £ 75
free calls to regular phones within the UK, Ireland
low rates to mobile phones in the UK 9.75 p/min
no terms commitments
billing online