FTDM_CODEC_NONE   527 src/ftmod/ftmod_wanpipe/ftmod_wanpipe.c 		ftdmchan->native_codec = ftdmchan->effective_codec = FTDM_CODEC_NONE;
FTDM_CODEC_NONE   605 src/ftmod/ftmod_zt/ftmod_zt.c 		ftdmchan->native_codec = ftdmchan->effective_codec = FTDM_CODEC_NONE;