Lets operators or end users define and manage lists of destinations allowed (whitelists) and/or restricted (blacklists.) Lists may include numbers or ranges of numbers.
The system compares call numbers to whitelists and blacklists, and processes them accordingly. Depending on the use case, blacklisted calls can be released or forwarded to an announcement. (The application handles calls that are not blacklisted or whitelisted according to a configured default.)