To block a caller ID:

  1. Click the Add Number button on the Block Caller ID editor. The Add Number window appears.
  2. In the Number field, enter the unwanted caller number that you want to block.
  3. In the Expiration Date field, click the calendar icon and use the Date Picker to select a date. Click Ok.
  4. Add the description for the phone number. 
  5.  Click Save Number to add the number to the blocked numbers list.

A default message is played when a blocked caller calls again. For example: The person you are trying to reach is not accepting calls at this time.  Please try your call again later.

Demo

For more information, see the demo: