Dealing with an issue where one of my clients is getting a lot of spam, see below is an example of what happens in a 60 second period, the number vairys, some days nothing, then some days this. Upstream sip provider says there's not much they can do, they offer spam blocking but this number doesn't get a spam score, other than manually blocking numbers in fusion is there anything I can do ? is there any fail2ban style system but with phone calls where i could block this many calls from the same number in such a short time ?