asterisk users - Jul 2015 - For a failed retransmission - what were the IP addresses?

Hi Guys

Given these occassional errors on my Asterisk CLI:

[Jul  2 10:23:36] WARNING[2060]: chan_sip.c:3641 retrans_pkt: Retransmission
timeout reached on transmission
17bb3a993ad10f8818970ae952b81e73 at 192.168.11.31:5060 for seqno 102 (Critical
Request) -- See
https://wiki.asterisk.org/wiki/display/AST/SIP+Retransmissions
Packet timed out after 32000ms with no response
 [Jul  2 10:23:49] WARNING[2060]: chan_sip.c:3641 retrans_pkt:
Retransmission timeout reached on transmission
2f6fa425581373c11c2ae58a276751bb at 192.168.11.31:5060 for seqno 102 (Critical
Request) -- See
https://wiki.asterisk.org/wiki/display/AST/SIP+Retransmissions
Packet timed out after 32000ms with no response

E. g. I have the transmission numbers

17bb3a993ad10f8818970ae952b81e73

and

2f6fa425581373c11c2ae58a276751bb

on which packets timed out.

Is there any way I can determine the IP addresses where those packets
referred to by these errors timed out on?

What is Sequence 102?

192.168.11.31 is my Asterisk 1.8.11.0 server.

Thanks!

Regards

Stefan