===========================================================
===
=== Information for upgrading between Asterisk versions
===
=== These files document all the changes that MUST be taken
=== into account when upgrading between the Asterisk
=== versions listed below. These changes may require that
=== you modify your configuration files, dialplan or (in
=== some cases) source code if you have your own Asterisk
=== modules or patches. These files also include advance
=== notice of any functionality that has been marked as
=== 'deprecated' and may be removed in a future release,
=== along with the suggested replacement functionality.
===
=== UPGRADE-1.2.txt -- Upgrade info for 1.0 to 1.2
=== UPGRADE-1.4.txt -- Upgrade info for 1.2 to 1.4
=== UPGRADE-1.6.txt -- Upgrade info for 1.4 to 1.6
=== UPGRADE-1.8.txt -- Upgrade info for 1.6 to 1.8
=== UPGRADE-10.txt  -- Upgrade info for 1.8 to 10
=== UPGRADE-11.txt  -- Upgrade info for 10 to 11
=== UPGRADE-12.txt  -- Upgrade info for 11 to 12
=== UPGRADE-13.txt  -- Upgrade info for 12 to 13
=== UPGRADE-14.txt  -- Upgrade info for 13 to 14
===========================================================

New in 15.0.0:

Build System:
 - '--with-pjproject-bundled' is now the default when running ./configure
   It can be disabled with '--without-pjproject-bundled'.

Core:
 - Multi-stream support has been added so a channel can have multiple
   streams of the same type such as audio and video.

 - The 'Data Retrieval API' has been removed. This API was not actively
   maintained, was not added to new modules (such as res_pjsip), and there
   exist better alternatives to acquire the same information, such as the
   ARI. As a result, the 'DataGet' AMI action as well as the 'data get'
   CLI command have been removed.