Your post does not answer my question. First of all, it's out of date by a couple of years. Second, it doesn't address the voice commands since PPP doesn't use the voice options. Third, it doesn't list the AT commands that the modem actually supports which is the question that I asked. Fourth, I know how to use Modem AT Commands - I want to know which ones this modem actually supports since none of the voice AT commands I tried worked.