При срабатывании таймаута в логах не отображается ошибка. Только это 2016-08-22 07:53:52 asterisk[2864]: NOTICE[2906]: chan_sip.c:23745 in handle_request_invite: Call from '' (5.39.85.24:5071) to extension '810972595183142' rejected because extension not found in context 'public-direct-dial'.
2016-08-22 07:54:10 asterisk[2864]: NOTICE[2906]: chan_sip.c:23745 in handle_request_invite: Call from '' (5.39.85.24:5070) to extension '9810972595183142' rejected because extension not found in context 'public-direct-dial'.
2016-08-22 07:54:24 asterisk[2864]: WARNING[2906]: chan_sip.c:3719 in retrans_pkt: Retransmission timeout reached on transmission 57cd0ddd1a1d72a498091422b99d7d1a for seqno 1 (Critical Response) -- See
https://wiki.asterisk.org/wiki/display/AST/SIP+Retra
2016-08-22 07:54:28 asterisk[2864]: NOTICE[2906]: chan_sip.c:23745 in handle_request_invite: Call from '' (5.39.85.24:5074) to extension '810972595183142' rejected because extension not found in context 'public-direct-dial'.
2016-08-22 07:54:42 asterisk[2864]: WARNING[2906]: chan_sip.c:3719 in retrans_pkt: Retransmission timeout reached on transmission d787b0f7ad23199b331422e380d1f8ea for seqno 1 (Critical Response) -- See
https://wiki.asterisk.org/wiki/display/AST/SIP+Retra
2016-08-22 07:54:44 asterisk[2864]: NOTICE[2906]: chan_sip.c:23745 in handle_request_invite: Call from '' (5.39.85.24:5076) to extension '9810972595183142' rejected because extension not found in context 'public-direct-dial'.