How does phone verification work with customers who are deaf? Does the API could provide an option where the computer calling the customer plays Baudot code [h

How does phone verification work with customers who are deaf? Does the API could provide an option where the computer calling the customer plays Baudot code [http://en.wikipedia.org/wiki/Baudot_code http://en.wikipedia.org/wiki/Baudot_code] instead of speaking the numbers in English?