Have you thought about investing your money in a new telecommunication tool such as the business Voip? I think that the opportunity offered by the Voice Over Internet Protocol technology is huge and that if you run a company or a business, you should take advantage of it.
A lot of people already use the technology and they are very happy about it. They can now receive and make calls with the help of the internet, which means that the phone will not be busy ever again and that they will not lose any more clients because they simply move to another company when the phone is busy.
This technology also offers you the chance to connect with the offices that you have in other cities in an easier and cheaper way, so I think that you understand where its huge popularity comes from. You should try it, as I think that you will like it.