The Global Blocklist feature will help you to block incoming calls from the numbers added in the Global blocklist. All the blocked numbers will get a busy tone when they try to call any number in your account. Should you need any assistance, feel free to contact our support department.
Configuring the Global Blocklist
Firstly, head to the PBX tab and go to Settings --> Global blocklist
Once you are on the Global Blacklist page, click on Add and enter the number you would like to block
Click on Add and Click on save after adding all the numbers.
You can block callers without any caller IDs displayed by selecting “Block anonymous calls”.
Once saved, click on Apply Configuration
See it in Action