2008 VoIP and Video Conferencing Professional Reference CDLarry Chaffin, Joshua Brashars, Johnny Long, Michael Gough, Markus Daehne, Thomas Porter · First published 2007Open the Tome
Asterisk hackingBenjamin Jackson, Larry Chaffin, Johnny Long, Joshua Brashars · First published 2007Open the Tome
Microsoft Vista for IT security professionalsTony Piltzecker, Larry Chaffin · First published 2007Open the Tome
Building a VoIP Network with Nortel's Multimedia Communication Server 5100Larry Chaffin · First published 2006Open the Tome
