Packt is pleased to announce a new book that helps design and develop VoIP telephony platforms and services through the Asterisk platform. Written by Open Source expert, Kerry Garrison, trixbox CE 2.6 guides users with clear instructions and screenshots to create a complete and cost effective VoIP based telephony system.

Voice Internet Protocol (VoIP) Telephony refers to the technology used for making telephone calls over the Internet. The two major technologies used to implement VoIP telephony are Asterisk and OpenSER. This article by Flavio E. Goncalves compares Asterisk and OpenSER topic by topic and shows the differences between them.

When Asterisk sponsor Digium, Inc. released AsteriskNOW, early in January 2007, the stated aim was to provide an open-source telephony "appliance." Not appliance as in hardware/software combo, but appliance as in 'all the software you need to get a complete telephony application up and running'—even if you don't know a lot about Linux administration.

Switchvox is Digium's commercially licensed VoIP IP PBX and was last updated a year ago for enhanced unified communications collaboration services. Digium itself is best known as the lead commercial sponsor behind the open source Asterisk IP PBX effort, which also serves as the base for Switchvox.

It has been about a month since Digium launched the Asterisk Exchange — an online marketplace to help VARs and customers piece together telephony solutions based upon the open source IP PBX. It’s an intriguing concept — similar to Red Hat’s failed Red Hat Exchange efforts. So can Digium succeed where Red Hat failed? Yes. Here’s why.

The open source Asterisk VoIP PBX is now at its 1.6.x release -- it's a number that Asterisk is going to stay at for a long time. That's the message that Kevin Fleming, Director of Software Technologies at Digium and co-maintainer of the Asterisk told attendess at the IT360 conference here in Toronto.

The Electronic Frontier Foundation (EFF) has won reexamination of an illegitimate patent on voice-over-Internet protocol (VoIP) that could cripple the adoption of new VoIP technologies.

This article will present a simple VoIP solution using Asterisk, an open source private branch exchange (PBX) product. It will show you how to install Asterisk, configure it using its LDAP backend, and connect to it using the Ekiga software VoIP client and a Cisco 7900 Series VoIP telephone to make calls.

Digium CEO Danny Windham has a message for networking VARs seeking a new opportunity in the IT channel: Digium -- the provider of Asterisk, the open source IP PBX -- is profitable, growing and seeking talented solutions providers. Here are more thoughts.