If you send Voice SMS with authentication codes or other password-type words, you will be interested in the ‘spell’ feature.
This syntax allow you to tell our system to spell a word instead of reading this word when converting the text into audio just before being sent.
For example, if the word was CAD, it will read it as c-a-d and not cad.
This is applicable when using our API. Here is how you should set the body of the SMS:
body='<![CDATA[<a>MESSAGE GOES HERE WITH<spell>LETTERS TO BE READ OUT INDIVIDUALLY INSIDE THESE TAGS</spell>AND THEN CLOSE EVERYTHING AGAIN</a>]]>’
If you are having issues implementing this, please contact our support team.