Elephant Talk Communications Corp. Appoints Yves van Sante to its Board of Directors

OKLAHOMA CITY, Okla., May 29, 2014 /PRNewswire/ -- Elephant Talk Communications Corp. (NYSE MKT: ETAK) ("Elephant Talk" or the "Company"), a global provider of Software Defined Network Architecture (ET Software DNA® 2.0) platforms and cyber security solutions, today...