I'm collecting rtp stat by using xml_cdr, weird that the b leg marked all packets as cng. Is that a problem? Here is a real call last more than 15 minutes (codec PCMU). FreeSWITCH is in the middle, A leg is another FS server and B leg is a PolyLink Sip Server. FreeSWITCH version is 13066. A-leg: <rtp_audio_in_raw_bytes>7718374</rtp_audio_in_raw_bytes> <rtp_audio_in_media_bytes>7712484</rtp_audio_in_media_bytes> <rtp_audio_in_packet_count>44878</rtp_audio_in_packet_count> <rtp_audio_in_media_packet_count>44841</rtp_audio_in_media_packet_count> <rtp_audio_in_skip_packet_count>15560</rtp_audio_in_skip_packet_count> <rtp_audio_in_jb_packet_count>0</rtp_audio_in_jb_packet_count> <rtp_audio_in_dtmf_packet_count>0</rtp_audio_in_dtmf_packet_count> <rtp_audio_in_cng_packet_count>3</rtp_audio_in_cng_packet_count> <rtp_audio_in_flush_packet_count>3</rtp_audio_in_flush_packet_count> <rtp_audio_out_raw_bytes>7860786</rtp_audio_out_raw_bytes> <rtp_audio_out_media_bytes>7860744</rtp_audio_out_media_bytes> <rtp_audio_out_packet_count>45705</rtp_audio_out_packet_count> <rtp_audio_out_media_packet_count>45702</ rtp_audio_out_media_packet_count> <rtp_audio_out_skip_packet_count>0</rtp_audio_out_skip_packet_count> <rtp_audio_out_dtmf_packet_count>0</rtp_audio_out_dtmf_packet_count> <rtp_audio_out_cng_packet_count>3</rtp_audio_out_cng_packet_count> B-leg: <rtp_audio_in_raw_bytes>7861260</rtp_audio_in_raw_bytes> <rtp_audio_in_media_bytes>7861260</rtp_audio_in_media_bytes> <rtp_audio_in_packet_count>45705</rtp_audio_in_packet_count> <rtp_audio_in_media_packet_count>45705</ rtp_audio_in_media_packet_count> <rtp_audio_in_skip_packet_count>481</ rtp_audio_in_skip_packet_count> <rtp_audio_in_jb_packet_count>0</rtp_audio_in_jb_packet_count> <rtp_audio_in_dtmf_packet_count>0</rtp_audio_in_dtmf_packet_count> <rtp_audio_in_cng_packet_count>0</rtp_audio_in_cng_packet_count> <rtp_audio_in_flush_packet_count>0</rtp_audio_in_flush_packet_count> <rtp_audio_out_raw_bytes>7703020</rtp_audio_out_raw_bytes> <rtp_audio_out_media_bytes>0</rtp_audio_out_media_bytes> <rtp_audio_out_packet_count>44785</rtp_audio_out_packet_count> <rtp_audio_out_media_packet_count>0</rtp_audio_out_media_packet_count> <rtp_audio_out_skip_packet_count>0</rtp_audio_out_skip_packet_count> <rtp_audio_out_dtmf_packet_count>0</rtp_audio_out_dtmf_packet_count> <rtp_audio_out_cng_packet_count>44785</rtp_audio_out_cng_packet_count> Thanks.