[App_rpt-users] ilbc codec source code ?

Hi, I wanted to do some tests with low bandwidth codecs for mobile IAX2 users. I tried to configure iLBC, but the module codec_ilbc.so is not present. Having a look at my Asterisk source folder (/usr/src/astsrc-1.4.23-pre/asterisk/codecs/), there's an "ilbc" sub-folder, but it only contains a Makefile, not the source files. This Asterisk install is rather old, I don't remember how I installed it, and where I got the sources. Where could I find the missing ilbc codec source files ? 73 de TK1BI