Retransmission timeout

[2015-06-26 15:49:45] WARNING[1914]: chan_sip.c:4015 retrans_pkt: Retransmission timeout reached on transmission 4865027d15f8ad02939a45aee299b48f for seqno 1 (Critical Response)
Packet timed out after 31999ms with no response

For all your posts, please start with

http://wiki.freepbx.org/display/GHWF/Providing+Great+Debug