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Joshua Colp

Blog Author

About the Author

Joshua Colp is a Senior Software Developer at Digium and a long time Asterisk developer. He originally started in the community submitting simple patches and grew into improving and creating new core components of Asterisk itself. He is a self-taught programmer who believes in finding the balance between doing things the way they should be done and doing what is right for the people using the software. In his spare time he enjoys smashing fax machines.

app_queue And The Case Of The In Call Agent

By Joshua Colp

The app_queue module is one of the oldest modules in Asterisk and implements call queueing functionality. You configure a queue with members and a strategy and these members receive calls

Continuous Integration: Helping to find problems.

By Joshua Colp

Continuous integration isn’t something that many people in the Asterisk project think about but it is a critical part of the development of Asterisk. It provides assurances on changes that

Stream Support in Asterisk

By Joshua Colp

Media streams are something that we all use every day. From watching videos on Youtube to placing calls media streams are right there with us in the background. They are

New Feature: PJSIP Dual Stack

By Joshua Colp

A new feature that was initially implemented during a recent visit to SIPit has now been merged into the 13, 14, and master Asterisk branches. It’s called PJSIP dual stack!

The Case Of The Misunderstood PJSIP Callback

By Joshua Colp

When the PJSIP work for Asterisk began one of the primary concerns kept in mind was that it be extensible. One of the APIs derived from this concern was session

Documentation? We’ve Got That!

By Joshua Colp

I’ve been a part of the Asterisk project for many years now, over 10 in fact. I’ve seen it evolve and grow and one of those areas which has changed

Asterisk 14 ARI: Create, Bridge, Dial.

By Joshua Colp

Asterisk’s REST Interface (ARI) in both Asterisk 12 and 13 has the ability to originate (create) outgoing channels.  The functionality in ARI mirrors that of the “originate” CLI command, AMI

Asterisk 13.10.0 Notable Changes

By Joshua Colp

It’s been a few months since Asterisk 13.9.0 was released and this new 13.10.0 release is full of interesting changes. Let’s take a look at a few that you might

Asterisk 13.9.0 Notable Changes

By Joshua Colp

It seems just like yesterday that Asterisk 13.8.0 was released but here we are with an Asterisk 13.9.0 (and subsequently 13.9.1). This post shines the light on some notable changes

Asterisk 14: Coming with improved PJSIP DNS Support!

By Joshua Colp

The PJSIP library now used by Asterisk to provide SIP support has included basic SIP DNS support for quite some time. However through using it ourselves and from feedback from

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