In addition to blocking individual phone numbers, there is another option we can implement to help reduce the number of spam calls reaching your staff.

If your phone system doesn't have a greeting, it means every single call goes directly to users. Including spam and robocalls that will be passed through automatically.

A possible solution is to set up an Auto Attendant. With an Auto Attendant, callers are greeted with a recorded message and prompted to select an option before their call is routed.

For example:

"Thank you for calling Acme Solutions. To schedule an appointment, press 1. For general inquiries, press 0."

Many spam and robocalls are unable to respond to menu prompts, so they are often filtered out before reaching your users. While this may not eliminate every spam call, it can significantly reduce the number that get through.