Leif Madsen

Leif Madsen

Asterisk Consultant, Author

  • @leifmadsen

Caledon, Ontario

Areas of Expertise:

  • asterisk
  • clustering
  • call-centre
  • call-center
  • dialplan
  • queues
  • odbc
  • func_odbc
  • consulting
  • speaking
  • programming
  • writing
Leif Madsen first took an interest in Asterisk while attempting to find a voice conferencing solution for him and his friends. After someone suggested trying Asterisk, the obsession began. Wanting to contribute and be involved with the community, and noticing the lack of Asterisk documentation, he co-founded the Asterisk Documentation Project. Leif is currently working as a consultant, specializing in Asterisk clustering and call-centre integration. You can get more information at http://www.leifmadsen.com

Asterisk: The Definitive Guide Asterisk: The Definitive Guide
by Russell Bryant, Leif Madsen, Jim Van Meggelen
Fourth Edition May 2013
Print: $54.99
Ebook: $46.99

Asterisk: The Definitive Guide Asterisk: The Definitive Guide
by Jim Van Meggelen, Leif Madsen, Russell Bryant
Third Edition April 2011
OUT OF PRINT

Asterisk Cookbook Asterisk Cookbook
by Leif Madsen, Russell Bryant
April 2011
Print: $29.99
Ebook: $16.99

Asterisk: The Future of Telephony Asterisk: The Future of Telephony
by Jim Van Meggelen, Jared Smith, Leif Madsen
Second Edition August 2007
Ebook: $35.99

Asterisk: The Future of Telephony Asterisk: The Future of Telephony
by Jared Smith, Jim Van Meggelen, Leif Madsen
September 2005
OUT OF PRINT

Leif blogs at:

Querkles

May 27 2015

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Protecting health through open data management principles

May 27 2015

Register for the free webcast, “Life Streams, Walled Gardens, and the Internet of Living Things.” Brigitte Piniewski and Hagen Finley will discuss the Internet of Living Things, what makes sensoring and monitoring data emanating from our bodies unique, and why … read more

Protecting health through open data management principles

May 27 2015

Register for the free webcast, “Life Streams, Walled Gardens, and the Internet of Living Things.” Brigitte Piniewski and Hagen Finley will discuss the Internet of Living Things, what makes sensoring and monitoring data emanating from our bodies unique, and why … read more

Dior and I

May 27 2015

read more

Building applications in Azure

May 27 2015

Download a free copy of “Azure for Developers,” an O’Reilly report by experienced .NET developer John Adams that breaks down Microsoft’s Azure platform in plain language, so that you can quickly get up to speed. One of the most natural … read more

Announcing Cassandra certification

May 27 2015

I am pleased to announce a joint program between O’Reilly and DataStax to certify Cassandra developers. This program complements our developer certification for Apache Spark and — just as in the case of Databricks and Spark — we are excited … read more

Building applications in Azure

May 27 2015

Download a free copy of “Azure for Developers,” an O’Reilly report by experienced .NET developer John Adams that breaks down Microsoft’s Azure platform in plain language, so that you can quickly get up to speed. One of the most natural … read more

Announcing Cassandra certification

May 27 2015

I am pleased to announce a joint program between O’Reilly and DataStax to certify Cassandra developers. This program complements our developer certification for Apache Spark and — just as in the case of Databricks and Spark — we are excited … read more

5 ways to reduce the pain of the inevitable

May 27 2015

This article is by staff writer William Cowie. Jake and Kelly (not their real names) were very dear friends of ours. Well, Kelly is still, but her husband just recently passed away. Because he was healthy and active, it came as a complete shock to us all — especially to… read more

Four short links: 27 May 2015

May 27 2015

Roboto — Google’s signature font is open sourced (Apache 2.0), including the toolchain to build it. Pregel: A System for Large Scale Graph Processing — a walk through a key 2010 paper from Google, on the distributed graph system that … read more