Block List - Auto blocking?

1. Brekeke Product Name and Version: Brekeke SIP Server 3.4.7.2/411-1

2. Java version: (build 1.8.0_91-b14)

3. OS type and the version: Server 2012 R2 Standard

4. UA (phone), gateway or other hardware/software involved: CosmoCall 7.2.2.143

5. Your problem: Our voice switch IP was automatically added to the Blocked List -> Blocked IP address. Need to understand how and why that happened.. and how we can prevent that from happening again.
Thank you

What the [Reason] field say with the blocked IP address?

There are six monitoring methods in the default. You can tune their thresholds in [Block List]->[Settings].