Hey,
Using the commercial visual voicemail phone app on an Aastra 6757i - I believe in the old Aastra XML script, there used to be a Call Back button, but the Call Back option does not appear on the Aastra.
If I check my D65, there is a Call Back option available in Visual Voicemail.
Does anyone know how to enable or add the Call Back button on the Aastra’s?