browser.tonedetection.amd.maxgreeting

Maximum time (milliseconds) to wait for the greeting message of a detected answering machine to finish.

If not set, the default is 30000 (30 seconds). If this time expires before the message ends, the Voice Browser service stops waiting and proceeds with the application, which determines the action to take (normally a prompt).

You must also enable Tone detection by setting for this service property to have any effect.