Asterisk is a complete PBX and telephony toolkit in software. It runs on Linux, *BSD, MacOSX, and Solaris. It provides all of the features you would expect from a PBX and more as it enables developers to build customized voice applications of many types. Asterisk does voice over IP in many protocols, and can interoperate with almost all standards-based telephony equipment using relatively inexpensive hardware.

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    Whitepaper: High Quality Analog Interface Cards for Use with Asterisk

    I just came across a whitepaper on analog interface cards via the Digium twitter feed. This paper compares performance of analog cards from Digium, Sangoma, and Rhino.
    Check out the promotion where you can get $100 off your purchase.
    Here is the whitepaper.

    This Post Brought to You by Dr. Pepper

    Working at Digium is so random sometimes. This morning, an entire pallet of Dr. Pepper arrived for Kevin P. Fleming, my boss, and the Director of Software Technologies. This pallet held 42 cases of 24 20 oz. bottles each. That’s 1008 20 oz. bottles of Dr. Pepper. Furthermore, this arrived with [...]

    Speeding up Asterisk with the Hoard Memory Allocator

    A little over a year I ago, I made a post to the Asterisk-dev mailing list looking for someone to do some load testing with the Hoard Memory Allocator.
    Chris Tooley just recently gave it a test run and saw a boost of about 10% in the number of call setups per second that [...]

    Asterisk 1.4.21.1 Released

    The Asterisk.org development team has released Asterisk version 1.4.21.1.
    This includes a critical bug fix for 1.4.21. All users that experienced lockups when upgrading to 1.4.21 should have their issues resolved with this update.
    Asterisk ... [More] 1.4.21.1 is available for download from the downloads site:

    http://downloads.digium.com/pub/telephony/asterisk

    Thank you for your continued support of Asterisk! [Less]

    How-to: Write an Asterisk Module, Part 3

    Greetings fellow developers!
    This is part 3 of a series on implementing the basic interfaces to provide features to Asterisk.
    Part 1 - Basic Module Structure
    Part 2 - CDR Handling Interface
    In this section, you will see how to ... [More] implement an Asterisk CLI command. CLI commands are extremely useful for showing configuration, statistics, and other debugging purposes.
    We [...] [Less]

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Who uses Asterisk?

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Who contributes to Asterisk?

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Project Cost

This calculator estimates how much it would cost to hire a team to write this project from scratch. More »
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Codebase 611,606
Effort (est.) 168 Person Years
Avg. Salary $ year
$ 9,244,030