@benlangfeld With a default flite configuration, passing in `<say-as interpret-as="characters">1234</say-as>` will result in you hearing "twelve thirty-four" instead of the more useful "one two three four" we'd like here.  Adding a space after each digit results in the expected output... 

But let me know if we'd rather take this out, and depend on configuration options being set up on freeswitch (in `ssml.xml.conf`)