Yes, you can change the wait time anywhere between 1 and 60 seconds.

If you aren’t getting attachments with the emails, then make sure that you have selected “Enabled with Attachment” on your “AXvoice voicemail preferences” page. To enable email notifications, click on the “Voicemail” tab on your AXvoice control panel. From the proceeding page, click on the “Set Preference” tab that can be found under “My Voicemail” section. On the “Voicemail Preferences” tab that follows, “select Enabled with Attachment” from the drop-down menu against “Email Notification”.

On your control panel’s voicemail page, open the “Set Preference” tab. On the proceeding page, provide an email address in the field “Email address to send message to” and click “Update Preferences”.