/var/log/asterisk/event_log {
    notifempty
    missingok
}
/var/log/asterisk/messages {
    notifempty
    missingok
    postrotate
        [ -e /usr/sbin/asterisk ] && /usr/sbin/asterisk -rx "restart when convenient"  2> /dev/null || /bin/true
    endscript
}