Ping back April 25, 2019 12:36 Updated Follow An unanswered call will be noted as a missed call. You can use the Ping Back feature to let the customer know that you are now available. How to Ping back Open OKTIUM 4B, and see your Calls History. Click on it. Then click the little Bell icon and confirm that you want to send a Ping back. There is only one Ping back per missed call. Comments 0 comments Please sign in to leave a comment.