Here is an article about how to setup Alexa for calling in case you need to make emergency calls.

This skill operates similar to the device that people wear as a necklace, but with Echo’s around the house, you don’t have to wear anything.

Depending on how many dots you have in your house, the dot could pick up your call for help and make a call to someone.  Check out the article.

Source: Using Amazon’s Alexa for phone calls can come in handy in an emergency