Asterisk 12.0.0-beta2 Now Available!

The Asterisk Development Team is pleased to announce the second beta release of Asterisk 12.0.0.  This release is available for immediate download at

All interested users of Asterisk are encouraged to participate in the Asterisk 12 testing process.  Please report any issues found to the issue tracker, All Asterisk users are invited to participate in the #asterisk-bugs channel to help communicate issues found to the Asterisk developers. It is also very useful to see successful test reports. Please post those to the asterisk-dev mailing list (

Asterisk 12 is the next major release series of Asterisk. It will be a Standard release, similar to Asterisk 10.  For more information about support time lines for Asterisk releases, see the Asterisk versions page:

For important information regarding upgrading to Asterisk 12, please see the Asterisk wiki:

As Asterisk 12 has a more flexible feature policy, a number of new features have been included in the second beta release that were not present in the first beta release. These include:

  • Numerous new features and improvements to ARI, including the ability to manipulate and query device state, snoop on channels (similar to the ChanSpy dialplan application), and improvements to the overall consistency of the RESTful API.
  • New AMI commands for the PJSIP stack, including:
  • Major improvements to, a sip.conf to pjsip.conf conversion script. Users migrating to the PJSIP stack can use this script to aid in the migration process from an existing sip.conf configuration file.
  • Standardization of the PJSIP configuration parameters. The configuration option schema for pjsip.conf now uses snake case for all of its options. This will impact current beta testers, as options such as ‘fromuser’ will now be ‘from_user’, etc. Please verify your options against the documentation on the Asterisk wiki at:
  • Many bug fixes reported by the Asterisk community. Thank you for your collaboration and participation in testing the first Asterisk 12 beta release!

For more information on the Asterisk 12 release policy, please see the Asterisk wiki:

In addition to these improvements in the second beta release, Asterisk 12 contains many new major freatures. A short list of some of these features includes:

  • A new SIP channel driver and accompanying SIP stack named chan_pjsip has been added. This new channel driver is based on the PJSIP SIP stack by Teluu. It includes support for the vast majority of features currently in chan_sip, as well as numerous architectural improvements that alleviate pain points present in the legacy SIP channel driver. Users who wish to use the new SIP channel driver are encouraged to read the instructions on installing and configuring PJSIP for Asterisk on the Asterisk wiki at Detailed instructions on configuring the new SIP stack in Asterisk can be found on the Asterisk wiki as well, at Test reports of successful use of chan_pjsip, with endpoint details, in addition to bug reports, are most welcome.
  • The Asterisk REST Interface (ARI) has been added. This interface lets external systems harness the telephony primitives within Asterisk to develop their own communications applications. Communication with Asterisk is done through a RESTful interface, while asynchronous events from Asterisk are encoded in JSON and sent via a WebSocket. More information on ARI can be found at
  • Major standardization of the Asterisk Manager Interface and its events have occurred within this version. In particular, the names of Asterisk channels no longer change and are stable throughout the lifetime of the channel. More information on the changes in AMI can be seen in the AMI 1.4 Specification at
  • All bridging within Asterisk is now performed using the Asterisk Bridging API, which previously was only used by the ConfBridge application. This affords Asterisk users greater stability, and has resulted in the abstraction of channel masquerades, renaming, and other internal implementation details. It also allows for the seamless transition between two-party and multi-party bridges using core features.

And much more!

More information about the new features can be found on the Asterisk wiki:

A full list of all new features can also be found in the CHANGES file.

For a full list of changes in the current release, please see the ChangeLog.

Thank you for your continued support of Asterisk!

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