Her original question was "How would I know if my computer has a voice modem.".The make/model of the modem would be a start.
I'm presuming that she can look at the model number of the modem. Of course, if she doesn't have a modem, then the answer is obvious, no? :4-dontknoIt won't be easy for her to give us the make/model of something that she isn't sure she has yet.