VoIP and security

Source:
https://www.google.com.au/search?q=voip&biw=1920&bih=935&source=lnms&tbm=isch&sa=X&ei=yRMQVYLNN8LRmwX4x4CgCg&ved=0CAcQ_AUoAg#tbm=isch&q=voip+and+security&imgdii=_&imgrc=5RnLgauRQz7HNM%253A%3BHTNiPdbQPAuU1M%3Bhttp%253A%252F%252Fmeship.com%252FBlog%252Fwp-content%252Fuploads%252F2011%252F02%252Fhosted-pbx-voip-security.jpg%3Bhttp%253A%252F%252Fmeship.com%252FBlog%252F2011%252F02%252F28%252Fis-voip-too-secure%252F%3B300%3B250