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       MWI Device State Subscriptions 
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Updates voice mail hints created by FreePBX.

FreePBX has an option to create voicemail hints allowing a BLF to monitor
any mailbox.  

See the FreePBX wiki: 
http://wiki.freepbx.org/display/F2/Subscribe+a+BLF+button+to+Monitor+a+Voicemail

Unfortunately, the module to update the hints is not part of Asterisk. It is 
provided in the official FreePBX distro as a patch to the distro Asterisk build.

This res_mwi_devstate.c was extracted from the FreePBX disto source rpm at:
http://yum.freepbxdistro.org/pbx/SRPMS/asterisk/13/asterisk13-13.7.2-1.shmz65.1.94.src.rpm

A Makefile has been added to build and install the module standalone.


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Requirements
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Only tested with Asterisk 13. 
This version uses the Stasis API and would not be compatible with Asterisk 11.


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Installation
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$ make
$ make install


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Usage
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See the FreePBX wiki:
http://wiki.freepbx.org/display/F2/Subscribe+a+BLF+button+to+Monitor+a+Voicemail


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License
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The MWI Device State Subscriptions module for asterisk is distributed under the
GNU General Public License v2. See COPYING for details.