When creating a broadcast there are 7 different broadcast types that can be selected. Below is a breif description of them.
In-app: sends the broadcast to your companies Sentinel app, the users receiving the broadcast will need to be logged in to the app. This broadcast type is for users only as contacts cannot login to the app.
SMS primary: sends the broadcast to user/contacts primary mobile number.
SMS secondary: sends the broadcast to users secondary mobile number (contacts do not have secondary mobile number).
Email primary: sends the broadcast to user/contacts primary email address.
Email secondary: sends the broadcast to user's secondary email address (contacts do not have secondary email address).
Voice primary: sends the broadcast to user/contacts primary mobile number.
Voice secondary: sends the broadcast to users secondary mobile number (contacts do not have secondary mobile number).