call_history_id,call_id,time_stamp,summary,transcoding,a_caller,b_caller,a_number,b_number,a_name,b_name,a_useragent,b_useragent,a_address,b_address,a_tun_address,b_tun_address,a_rtt,b_rtt,a_codec,b_codec,a_mos_to_pbx,b_mos_to_pbx,a_mos_from_pbx,b_mos_from_pbx,a_rx,a_tx,b_rx,b_tx,a_rx_loss,a_tx_loss,b_rx_loss,b_tx_loss,a_rx_jitter,a_tx_jitter,b_rx_jitter,b_tx_jitter,a_tx_bursts,b_tx_bursts,a_burst_len,b_burst_len,a_duration,b_duration,a_location,b_location,a_participant_id,b_participant_id
