Asterisk Tutorial

Asterisk Tutorial Jonny Martin Citylink jonny@citylink.co.nz Introduction • An introduction to installing and configuring Asterisk • Intermediate level - assumes basic knowledge of networking, linux systems, and VoIP • We’ll be building a real live Asterisk box as we progress through the slides • If you have a question please ask • Asterisk is the goods :) Agenda 1/2 • Installing Asterisk • All about Asterisk in three slides • Telephony Hardware • A basic Asterisk configuration • Zaptel hardware configuration • Asterisk codecs • System dimensioning Agenda 2/2 • Voicemail and conferencing • Administering Asterisk • Advanced Asterisk - DBs, AGI scripts, scaling • Configuration files What is Asterisk? • Asterisk, The Open Source PBX. www.asterisk.org • A complete PBX in software • Runs on Linux, BSD, MacOSX, and others • Covers most VoIP protocols • Many features built in - voicemail, conferencing, IVR, queuing, as well as standard

calling functions • Highly extensible - can handle virtually any task imaginable • Many different hardware telephony cards available Asterisk History • Originally developed by Mark Spencer starting around 1999 • He needed a flexible PBX for his linux support company so wrote one • Realised once a call is inside a PC, anything can be done with it - hence the name Asterisk • Met Jim Dixon from the Zapata telephony project in 2001 which provided hardware and a business model to further development • Now an active Asterisk development community Useful Reading • Asterisk, The Future of Telephony. By Jared Smith, Jim Van Meggelen, Leif Madsen. ISBN: 0-596-00962-3 • Published under Creative Commons license • http://www.asteriskdocs.org/modules/tinycontent/index.php?id=11 • www.voip-info.org • A public wiki - generally good information, but to be taken with a grain of salt • www.asterisk.org • www.digium.com Installing Asterisk • Asterisk uses three main packages: • asterisk • zaptel • libpri • Compile Requirements: • GCC (version 3.x or later) • Kernel source • Kernel headers • bison • openssl, openssl-dev, libssl-dev • libnewt Download Source # cd /usr/src/ # wget -–passive-ftp ftp.digium.com/pub/asterisk/asterisk-1.*.tar.gz # wget -–passive-ftp ftp.digium.com/pub/asterisk/asterisk-sounds-*.tar.gz # wget -–passive-ftp ftp.digium.com/pub/zaptel/zaptel-*.tar.gz # wget -–passive-ftp ftp.digium.com/pub/libpri/libpri-*.tar.gz #...

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