=========================================================
===
=== Information for upgrading from Asterisk 1.0 to 1.2
===
=== This file documents 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 includes 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.
===
=========================================================

Compiling:

* The Asterisk 1.2 source code now uses C language features
  supported only by 'modern' C compilers.  Generally, this means GCC
  version 3.0 or higher, although some GCC 2.96 releases will also
  work.  Some non-GCC compilers that support C99 and the common GCC
  extensions (including anonymous structures and unions) will also
  work.  All releases of GCC 2.95 do _not_ have the requisite feature
  support; systems using that compiler will need to be upgraded to
  a more recent compiler release.

Dialplan Expressions:

* The dialplan expression parser (which handles $[ ... ] constructs)
  has gone through a major upgrade, but has one incompatible change:
  spaces are no longer required around expression operators, including
  string comparisons. However, you can now use quoting to keep strings
  together for comparison. For more details, please read the
  doc/README.variables file, and check over your dialplan for possible
  problems.

Agents:

* The default for ackcall has been changed to "no" instead of "yes"
  because of a bug which caused the "yes" behavior to generally act like
  "no".  You may need to adjust the value if your agents behave
  differently than you expect with respect to acknowledgement.

* The AgentCallBackLogin application now requires a second '|' before
  specifying an extension@context.  This is to distinguish the options
  string from the extension, so that they do not conflict.  See
  'show application AgentCallbackLogin' for more details.

Parking:

* Parking behavior has changed slightly; when a parked call times out,
  Asterisk will attempt to deliver the call back to the extension that
  parked it, rather than the 's' extension. If that extension is busy
  or unavailable, the parked call will be lost.

Dialing:

* The Caller*ID of the outbound leg is now the extension that was
  called, rather than the Caller*ID of the inbound leg of the call.  The
  "o" flag for Dial can be used to restore the original behavior if
  desired.  Note that if you are looking for the originating callerid
  from the manager event, there is a new manager event "Dial" which
  provides the source and destination channels and callerid.

IAX:

* The naming convention for IAX channels has changed in two ways:
   1. The call number follows a "-" rather than a "/" character.
   2. The name of the channel has been simplified to IAX2/peer-callno,
   rather than IAX2/peer@peer-callno or even IAX2/peer@peer/callno.

SIP:

* The global option "port" in 1.0.X that is used to set which port to
  bind to has been changed to "bindport" to be more consistent with
  the other channel drivers and to avoid confusion with the "port"
  option for users/peers.

* The "Registry" event now uses "Username" rather than "User" for
  consistency with IAX.

Applications:

* With the addition of dialplan functions (which operate similarly
  to variables), the SetVar application has been renamed to Set.

* The CallerPres application has been removed.  Use SetCallerPres
  instead.  It accepts both numeric and symbolic names.

* The applications GetGroupCount, GetGroupMatchCount, SetGroup, and
  CheckGroup have been deprecated in favor of functions.  Here is a
  table of their replacements:

  GetGroupCount([groupname][@category]	       GROUP_COUNT([groupname][@category])	Set(GROUPCOUNT=${GROUP_COUNT()})
  GroupMatchCount(groupmatch[@category])       GROUP_MATCH_COUNT(groupmatch[@category])	Set(GROUPCOUNT=${GROUP_MATCH_COUNT(SIP/.*)})
  SetGroup(groupname[@category])	       GROUP([category])=groupname		Set(GROUP()=test)
  CheckGroup(max[@category])		       N/A					GotoIf($[ ${GROUP_COUNT()} > 5 ]?103)

  Note that CheckGroup does not have a direct replacement.  There is
  also a new function called GROUP_LIST() which will return a space
  separated list of all of the groups set on a channel.  The GROUP()
  function can also return the name of the group set on a channel when
  used in a read environment.

* The applications DBGet and DBPut have been deprecated in favor of
  functions.  Here is a table of their replacements:

  DBGet(foo=family/key)        Set(foo=${DB(family/key)})
  DBPut(family/key=${foo})     Set(DB(family/key)=${foo})

* The application SetLanguage has been deprecated in favor of the
  function LANGUAGE().

  SetLanguage(fr)		Set(LANGUAGE()=fr)

  The LANGUAGE function can also return the currently set language:

  Set(MYLANG=${LANGUAGE()})

* The applications AbsoluteTimeout, DigitTimeout, and ResponseTimeout
  have been deprecated in favor of the function TIMEOUT(timeouttype):

  AbsoluteTimeout(300)		Set(TIMEOUT(absolute)=300)
  DigitTimeout(15)		Set(TIMEOUT(digit)=15)
  ResponseTimeout(15)		Set(TIMEOUT(response)=15)

  The TIMEOUT() function can also return the currently set timeouts:

  Set(DTIMEOUT=${TIMEOUT(digit)})

* The applications SetCIDName, SetCIDNum, and SetRDNIS have been
  deprecated in favor of the CALLERID(datatype) function:

  SetCIDName(Joe Cool)		Set(CALLERID(name)=Joe Cool)
  SetCIDNum(2025551212)		Set(CALLERID(number)=2025551212)
  SetRDNIS(2024561414)		Set(CALLERID(RDNIS)=2024561414)

* The application Record now uses the period to separate the filename
  from the format, rather than the colon.

* The application VoiceMail now supports a 'temporary' greeting for each
  mailbox. This greeting can be recorded by using option 4 in the
  'mailbox options' menu, and 'change your password' option has been
  moved to option 5.

* The application VoiceMailMain now only matches the 'default' context if
  none is specified in the arguments.  (This was the previously
  documented behavior, however, we didn't follow that behavior.)  The old
  behavior can be restored by setting searchcontexts=yes in voicemail.conf.

Queues:

* A queue is now considered empty not only if there are no members but if
  none of the members are available (e.g. agents not logged on).  To
  restore the original behavior, use "leavewhenempty=strict" or
  "joinwhenempty=strict" instead of "=yes" for those options.

* It is now possible to use multi-digit extensions in the exit context
  for a queue (although you should not have overlapping extensions,
  as there is no digit timeout). This means that the EXITWITHKEY event
  in queue_log can now contain a key field with more than a single
  character in it.

Extensions:

* By default, there is a new option called "autofallthrough" in
  extensions.conf that is set to yes.  Asterisk 1.0 (and earlier)
  behavior was to wait for an extension to be dialed after there were no
  more extensions to execute.  "autofallthrough" changes this behavior
  so that the call will immediately be terminated with BUSY,
  CONGESTION, or HANGUP based on Asterisk's best guess.  If you are
  writing an extension for IVR, you must use the WaitExten application
  if "autofallthrough" is set to yes.

AGI:

* AGI scripts did not always get SIGHUP at the end, previously.  That
  behavior has been fixed.  If you do not want your script to terminate
  at the end of AGI being called (e.g. on a hangup) then set SIGHUP to
  be ignored within your application.

* CallerID is reported with agi_callerid and agi_calleridname instead
  of a single parameter holding both.

Music On Hold:

* The preferred format for musiconhold.conf has changed; please see the
  sample configuration file for the new format. The existing format
  is still supported but will generate warnings when the module is loaded.

chan_modem:

* All the chan_modem channel drivers (aopen, bestdata and i4l) are deprecated
  in this release, and will be removed in the next major Asterisk release.
  Please migrate to chan_misdn for ISDN interfaces; there is no upgrade
  path for aopen and bestdata modem users.

MeetMe:

* The conference application now allows users to increase/decrease their
  speaking volume and listening volume (independently of each other and
  other users); the 'admin' and 'user' menus have changed, and new sound
  files are included with this release. However, if a user calling in
  over a Zaptel channel that does NOT have hardware DTMF detection
  increases their speaking volume, it is likely they will no longer be
  able to enter/exit the menu or make any further adjustments, as the
  software DTMF detector will not be able to recognize the DTMF coming
  from their device.

GetVar Manager Action:

* Previously, the behavior of the GetVar manager action reported the value
  of a variable in the following manner:
   > name: value
  This has been changed to a manner similar to the SetVar action and is now
   > Variable: name
   > Value: value
