From CLI:
asterisk*CLI> sip list peers
Name/username Host Dyn Nat ACL Port Status
peavey/peavey 87.49.92.235 D N 55786 OK (128 ms)
kok/kok 83.94.174.23 D N 5060 OK (19 ms)
qdk/qdk 83.94.174.23 D N 1025 OK (30 ms)
3 sip peers [Monitored: 3 online, 0 offline Unmonitored: 0 online, 0 offline]
== Spawn extension (from-peavey-sip, 1, 2) exited non-zero on 'SIP/peavey-00d74000'
-- Executing [1@from-peavey-sip:1] NoOp("SIP/peavey-00d77000", ""Peavey calling QDK -SIP2SIP-"") in ne w stack
-- Executing [1@from-peavey-sip:2] Dial("SIP/peavey-00d77000", "SIP/qdk") in new stack
-- Called qdk
-- SIP/qdk-00d84000 is ringing
-- SIP/qdk-00d84000 answered SIP/peavey-00d77000
-- Packet2Packet bridging SIP/peavey-00d77000 and SIP/qdk-00d84000
[Oct 16 00:46:17] WARNING[34996]: chan_sip.c:1848 retrans_pkt: Maximum retries exceeded on transmission Mm FkMmY4M2QwMTUxMDFmMDgzYWExYzcxOTEwNzU1NGY. for seqno 2 (Critical Response)
[Oct 16 00:46:17] WARNING[34996]: chan_sip.c:1865 retrans_pkt: Hanging up call MmFkMmY4M2QwMTUxMDFmMDgzYWE xYzcxOTEwNzU1NGY. - no reply to our critical packet.
== Spawn extension (from-peavey-sip, 1, 2) exited non-zero on 'SIP/peavey-00d77000'
asterisk*CLI>
Disconnected from Asterisk server
Executing last minute cleanups
From log/asterisk/messages:
[Oct 16 00:46:17] WARNING[34996] chan_sip.c: Maximum retries exceeded on transmission MmFkMmY4M2QwMTUxMDFmMDgzYWExYzcxOTEwNzU1NGY. for seqno 2 (Critical Response)
[Oct 16 00:46:17] WARNING[34996] chan_sip.c: Hanging up call MmFkMmY4M2QwMTUxMDFmMDgzYWExYzcxOTEwNzU1NGY. - no reply to our critical packet.
[Oct 16 00:46:17] ERROR[34996] rtp.c: RTP Transmission error to 55.68.0.0:13618: Address family not supported by protocol family