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There’s lots of talk about VoIP being the way of the future for voice calling. An infographic produced by IP communications company, Megapath, puts numbers to the trend.

One of the biggest reasons cited for switching to VoIP is cost savings. The infographic put a number to this savings: $15 per line per month.

How much does VoIP save a company? Studies show that a quality VoIP line will cost an average of $25 per month compared with $40 per month for a comparable landline.

VoIP is cited for its mobility and flexibility, too.

There will be 83 million VoIP lines globally by 2015, and VoIP can travel with a person wherever they are in the world. It can be run from a computer or a mobile phone, and calls can forward from one number to the next easily.

How popular is VoIP? Very, according to the infographic.

Explore more infographics like this one on the web's largest information design community - Visually.

In 2001 there were about 121,000 people used VoIP. That number has now grown to 30 million in only 10 years. Small and medium-sized businesses are particularly fond of VoIP, with roughly 30 percent of small and medium-sized firms now using VoIP.

How is the business of VoIP? Quite good.

Global VoIP revenue has risen from $58 billion in 2011 to $65 billion in 2012. VoIP is expected to continue to grow by 10 percent each year from now until 2016, too.

Accordingly, landlines are slowly withering away.

Telecoms are losing an average of 700,000 landline customers per month. Now this can be because of cellular access, too, but VoIP certainly is a contributing factor.

Companies such as AT&T (News - Alert) and Verizon are increasingly losing revenue from declining landline business. AT&T is has lost at least 16.5 percent of its revenue since 2007, and Verizon (News - Alert) has lost 19 percent.

Contrast those numbers with VoIP, where an estimated 80 percent of businesses are considering the technology.

Yes, change is in the wind. The future of calling is VoIP.