Asterisk Blog

ARIAsterisk 20

ARI REST Requests over Websocket

Historically, using ARI required using HTTP for making REST requests and getting their responses, and a Websocket for receiving events.  With Asterisk 20.14.0, 21.9.0 and ...
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PJSIPReleases

Recent Security Issues

Security releases of Asterisk were recently created. In this post, we’d like to go into the depths of two of the security issues and how ...
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Testing

Continuous Integration: Helping to find problems.

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 ...
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PJSIPSIP

rtcp-mux in WebRTC

Do you use WebRTC with Asterisk? Did you notice calls stop working after updating Google Chrome to version 57? Are you curious why that happened? ...
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DocumentationHow To

Asterisk, Opus, packet loss, and FEC

So you’ve heard there is now an Opus codec for Asterisk that’s been released. However, you are having problems with poor audio quality due to ...
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Documentation

Dialplan handler routines allow customization

There are several handler routines available to allow you to customize behavior for the different states of a call. Handler routines execute outside of the ...
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DocumentationHow To

Five Shocking Tips on How to Get Asterisk Bugs Resolved Quickly

Warning, these tips may not be shocking, but you already know that and you clicked anyway! Shame! Many of us know the frustrating feeling of submitting a ...
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ArchitecturePJSIP

pjproject 2.6 now qualified for use with Asterisk!

This week, we’re pleased to say that we’ve updated the Asterisk 13, 14 and master branches’ bundled version of pjproject to 2.6.
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ArchitecturePJSIP

You Down With SDP? (Yeah you know me)

In the previous post, Josh introduced the forthcoming addition of streams to Asterisk. I’m going to piggyback on that to introduce a unified SDP API ...
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Architecture

Stream Support in Asterisk

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 ...
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DocumentationHow To

Configuring the Opus Encoder for Asterisk

The recently announced Opus codec for Asterisk exposes a few configuration options that allow you to manipulate the encoder for your particular setup. These options ...
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ArchitectureDocumentation

Jitter Buffer Operation and Use in Asterisk

Jitter buffer functionality has been in Asterisk for quite some time now. However, knowing what jitter is in a voice over IP (VoIP) application and ...
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PerformancePJSIP

SIP timers T1 and B affect performance

Busy Asterisk systems can be affected by the SIP timers T1 and B timeout values configured.  Consideration of their values impacts how quickly a transaction ...
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Filtering Event Types in ARI

Since the arrival of the Asterisk REST Interface (ARI) requests have been made to allow for event type filtering capabilities. Consumers have wanted a way

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Asterisk INLINE Optimization

Asterisk developers who have made use of one of our function attributes called “force_inline” should be aware we are discouraging it.  Why? Let’s get to

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R.I.P. Media Index Cache!

If you’ve been concerned about slow Asterisk startup times or excessive memory utilization, we’ve got some good news for you.  We’ve eliminated the media index

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