[EAS] Question re CAP and text-to-speech

[suzanne at mab.org]

Can one of you smart engineering types please answer a question for a non-techie policy wonk?  At what point in the EAS message chain does a text message translate into speech?  If our state Emergency Management Agency were to send a CAP-enabled message down a dedicated phone line to our State Primary (as a redundant backup to internet delivery), would the message have to be "in voice"?  Or does the translation happen at the receiving end, i.e. inside the EAS box at the State Primary?
 
Thanks!
 
Confused in Maine,
 
Suzanne Goucher