We have a custom Asterisk 13.7 installation and a Kamailio proxy. In most of the network, the asterisk is working properly and in some networks it shows misbehaviors. the asterisk system stops sending the registration request to Kamailio and the asterisk cannot reboot. I have been trying to figure out this issue but couldn’t get any solution yet.
You should also use the respective CLI commands of the channel driver to inspect the state of the outbound registration.