How to enable iLBC codec in Asterisk 

As you are aware, Asterisk 1.4.19 onwards, Asterisk does not include iLBC codec in the source. You will have to download it separately and install it. This article shows how to download and install iLBC codec in Asterisk. Follow these simple steps:

1. Download the iLBC codec.
2. Recompile Asterisk

1. Download the iLBC codec.

• Goto your Asterisk source folder. Eg (cd /usr/src/Asterisk-1.4.19.x/
• cd contrib
• cd scripts
• ./get_ilbc_source.sh

When you run this shell script, the iLBC codec will be downloaded. Now you have to recompile asterisk again. Remember to use menuselect/menuselect

2. Recompile Asterisk and install

• Goto your Asterisk source folder
• menuselect/menuselect
• When you run the above command you will see a menu.
• choose the Codecs menu
• and select 'iLBC' codec (use space bar to select)
• Press 's' to save the selection
• make
• make install

Now you have successfully installed iLBC codec in your Asterisk.