Hi,
the tcpdump starts with a pretty standard INVITE sequence:
10.0.0.121 -- INVITE --> 10.0.0.3
10.0.0.121 <-- 401 Unauthorized -- 10.0.0.3 // asterisk gives nonce in
WWW-Authenticate: header
10.0.0.121 -- ACK --> 10.0.0.3
After that, normally you would see a new INVITE from the phone
sometime during the past few upgrades on asterisk 13, my Cisco 7965G phones
are sporadically not able to make calls. after a few seconds, they just play a
fast-busy tone. I tried upgrading the 7965G OS from their original (working
for years) 9.4.2SR1 to 9.4.2SR3 and the behavior did not
