Asterisk : the future of telephony / Jim Van Meggelen, Jared Smith and Leif Madsen. Meggelen, Jim Van. Smith, Jared. Madsen, Leif. Asterisk (Computer file) Internet telephony. TK5105.8865 .M445 2005 004.69 MEA Includes bibliographical references and index. Beijing ; Sebastopol, Calif. : O'Reilly, 2007. 2007. 2005 Text xxiv, 574 p. : http://www.loc.gov/catdir/enhancements/fy0715/2006272659-d.html eng