So you're running a small business and naturally you have a phone line installed so your customers can contact you. Then you start to grow and have people working for you. Perhaps these people are located in different buildings, or even work from home, but you still want to be able to work with them like they are in the office next door, and make and receive telephone calls as a part of your business network. Well with an IP based phone system all of this is possible, and the best news is it doesn't cost a fortune. In fact in many cases it's cheaper than a couple of standard BT telephone lines.
So that's all sounding good, but it gets even better. IP based phone systems can benefit from all these features: