[jitsi-users] How to setup Jitsi for don't receive calls when busy

Hi all,
I'm just subiscribing this mailing list and I've tried to search the
archive to find a solution to this problem: when I'm busy in a call
with other user if I receive another call it rings instead of notify
other user(s) that I'm busy.
Is there a solution to solve this issue?
Also if I set my state in "Busy" I continue to receive calls to my SIP
account, is that normal?
At the moment I use Jitsi with one SIP account configured.

Thanks in advance.