How Enterprise Workers Communicate

Email remains mission critical for enterprise workers, even if email is considered outmoded by Millennials. On a daily basis, globally, an order of magnitude more emails are sent than telephone calls made, according to analysts at Gartner. 

Corporate Email: 82.7 billion
Corporate Telephone Calls: 5.4 billion ( over public PSTN and Cellular networks*)
Instant Messages: 26 billion