David DuffettDavid Duffett delivers Asterisk training and consultancy around the world through his own company (TeleSpeak Limited, www.telespeak.co.uk), in addition to designing and delivering training for a number of companies, including Digium, Inc. A keen Asteisk enthusiast, David also enjoys podcasting, radio presenting, and teaching public-speaking skills. He is a Chartered Engineer with experience in fields including Air Traffic Control communications, Wireless Local Loop, Mobile Networks, VoIP, and Asterisk. David has been in the telecoms sector for nearly 20 years and has had a number of computer telephony, VoIP, and Asterisk articles published through various industry publications and web sites. Read More Read Less