Hi, here is my uses case: 

I would like to configure a workflow that send an email automatically if an outbound call gets ununanswered. 

In detail: 

Step 1: make an outbound call to a lead's mobile phone through the CRM 

Step 2: The lead does not response: I do not left a voice message. 

Step 3: An email is sent to the lead's email saying : "hi, you can call me back whenever you want" 

I think that today you can only trigger workflow for outbound call on 3 action: 

1. Rigging 

2. attented

3. logged or modified 

--> The problem is that even if a call does not get an answer, it is qualify as "Attented" since you get directed to a voice message. 

Is there a solution that the workflow is send if the call recipient does not answer ? 

Thanks, 

Roméo 

PS: I work around would if to set a workflow based on the duration of the outbound call. Like if the call is less than 2seconde, it trigger the automatic email. Is this alternative solution possible ?