Cheers for the reply, ambiorixg12.
Here’s the output before the first call is made:
8dca4d752649*CLI> sip show peers
Name/username Host Dyn Forcerport Comedia ACL Port Status Description
test-agent/test-agent <ip> D Auto (No) No 32287 Unmonitored
twilio1 <ip> Auto (No) No 5060 Unmonitored
twilio2 <ip> Auto (No) No 5060 Unmonitored
twilio3 <ip> Auto (No) No 5060 Unmonitored
twilio4 <ip> Auto (No) No 5060 Unmonitored
5 sip peers [Monitored: 0 online, 0 offline Unmonitored: 5 online, 0 offline]
It remains the same after the first call is complete and before the second, failing, call is made