Adding Automatic Callbacks to Your Asterisk Voice Mail System. Don’t you just love those Baby Bell phone messages that say “Press 1 and, for a charge of 75¢, we will place this call for you"? Well, now you can add similar functionality to your Asterisk Voicemail System minus the 75¢ charge. Sometimes it’s a lot more convenient to have the computer do the dialing after you’ve listened to a voicemail message particularly when you’re zipping down the highway at warp speed. To add the functionality to Asterisk using the Asterisk Management Panel (AMP) or freePBX, here’s how. Open the settings for the voicemail extension you wish to configure with this option: Settings->Extensions->ext# . Now scroll down to the vm options field and add the following: callback=from-internal . Save your changes and click the big Red Bar to update Asterisk. In the future, when you listen to a voicemail message on this extension and want to automatically return the call, choose 3 for Advanced Options and then 2 to Return the Call. Just be sure your Default Asterisk Outbound Route is configured to dial using the same number format as your received CallerID numbers, and you’re all set. And, by the way, this works with Asterisk@Home versions at least as far back as 1.5. Too bad no one ever bothered to document it. Very slick!