How can I tell what side dropped the call?

Hello All,

How can I tell which side dropped this call from the CDR’s detail of the call below?

Thanks!

Time Event CNAM CNUM ANI DID AMA exten context App channel UserDefType EventExtra CEL Table 2016-01-2115:41:27 CHAN_START Robert Smith 297 DEFAULT 5555555555 from-internal SIP/297-0000b7be 2016-01-2115:41:27 CHAN_START DEFAULT s from-trunk SIP/IISG-OUT-1-0000b7bf 2016-01-2115:41:38 ANSWER CID:4444444444 5555555555 DEFAULT 5555555555 from-trunk AppDial SIP/IISG-OUT-1-0000b7bf 2016-01-2115:41:38 ANSWER 4444444444 297 5555555555 DEFAULT s macro-dialout-trunk Dial SIP/297-0000b7be 2016-01-2115:41:38 BRIDGE_START 4444444444 297 5555555555 DEFAULT s macro-dialout-trunk Dial SIP/297-0000b7be 2016-01-2115:42:23 BRIDGE_END 4444444444 297 5555555555 DEFAULT s macro-dialout-trunk Dial SIP/297-0000b7be 2016-01-2115:42:23 HANGUP CID:4444444444 5555555555 DEFAULT macro-dialout-trunk AppDial SIP/IISG-OUT-1-0000b7bf 2016-01-2115:42:23 CHAN_END CID:4444444444 5555555555 DEFAULT macro-dialout-trunk AppDial SIP/IISG-OUT-1-0000b7bf 2016-01-2115:42:23 HANGUP 4444444444 297 5555555555 DEFAULT 5555555555 restrictedroute-c4ca4238a0b923820dcc509a6f75849b SIP/297-0000b7be 2016-01-2115:42:23 CHAN_END 4444444444 297 5555555555 DEFAULT 5555555555 restrictedroute-c4ca4238a0b923820dcc509a6f75849b SIP/297-0000b7be 2016-01-2115:42:23 LINKEDID_END 4444444444 297 5555555555 DEFAULT 5555555555 restrictedroute-c4ca4238a0b923820dcc509a6f75849b SIP/297-0000b7be