This solution is designed to allow you to use a third party service called http://www.dialmycalls.com using their API and using BaseElements Plugin.
Once implemented you will be able to move/update data to the service directly from FileMaker.
DialMyCalls service is known as a Voice Broadcasting Service that allows you to send a recorded audio message or text to speech message to a known list of recipients.
Other features allows you to send text messages - even interactive response text messages.
Based on your business logic you can keep the service up to date with changes in your database in the background ready to broadcast out campaign to your distribution list knowing your data is up to date.
This is essential when you are using it for an emergency notification - when you may not have power/or internet on a computer. With their IPhone App you can create, record and broadcast out an announcement to your distribution list.
Their pricing plans are affordable and offer subscriptions and pay-as-you-go credit packages. - Depending on your packages each call is pennies a connection.
There is also a trial plan that you can test it out - they add a little advert attached to your recording.