In the last article, we looked at how to configure to block the range of internal numbers from spoofing and how to block calls at the client level. There are scenarios where you want to block anonymous, Unknown calls or calls that come with no caller-id.
New-CsInboundBlockNumberPattern - adds a blocked number pattern to the tenant level. Inbound PSTN calls are checked from a number that matches the blocked number pattern before routing the calls to users, and if the blocked pattern is found, it will be blocked.
Once you have configured the block number pattern, you can validate it on the "Get-CsTenantBlockedCallingNumbers"
In this example, I have configured it to block Anonymous calls.
You can validate the configuration by dialing *67 followed by the number.
On the client side, if it's a regular call with caller-id, you can able to call back or add the number to your contact list or block the caller (see below), but for Anonymous calls, you will get only the "Remove from view" option.
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