One of the most often questions we get is "What happens if two people pick up at the same time" well this support page puts that to rest.

Unless you want to call two pizza delivery companies to get your pizza quicker, there's no point in needing to speak to two people at the same time.

Specifically for parallel dialing, if you're calling multiple prospects at once and one of them answers before the other calls can reach their respective prospects voicemails, Quack will hang up those dials & move the task to the end of your call list.

This task will not yet be completed. Once you reach the bottom of your call list, you have the option to call that prospect again. Alternatively, you can skip this task to avoid calling the prospect multiple times (personal preference)