All, thanks for everyone's participation. The problem was resolved by installing initialization for G729 codec in pjsua_media.c file > #if PJMEDIA_HAS_*G729*_CODEC > status = pjmedia_codec_*g729*_init( pjsua_var.med_endpt ); > if (status != PJ_SUCCESS) { > pjsua_perror(THIS_FILE, "Error initializing *G729* codec", > status); > return status; > } > #endif /* PJMEDIA_HAS_G729_CODEC */ You need to search where the same was done for G722 codec and insert the block above. Alex -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20100130/52ca5680/attachment.html>