oneacl

To receive calls you _must_ use tcp or even better tls. Due to the nature of udp the connection will break within a minute or so. Tcp/tls connections are long...

You can easily do this is you build and use your own asterisk server. It will give you all the flexibility you want and then some more but it does...

Related to this, the native phone application probably broadcasts something that tells tasker "Phone idle" or "Phone off-hook". CSipSimple doesn't seem to do this.

Checkbox in preferences would probably be better as I'd use it as a permanent tick.

Some further notes: If I delete the old load balancer it will return 503s for a few minutes and the agent retries. When the load balancer eventually goes away completely...

A potential workaround I just found. I'm using AWS so I tested using a classic ELB to set the connection idle timeout to 1s - this appears to have fixed...