OKAY,
I read this and have been trying to set the initilization string.
I am going to Device Manager->Modems->Zoom External->Properties->Advanced->Extra Strings
If I put in S29=1, IVM answers, but the problem persists. (two green lights on modem)
If I put in S29=1 +VTD=70, IVM will not initialize the modem (only one green light)
If I put in S29=1 +FCLASS=8;+VTD=70, I get two green lights, but IVM will not answer the call.
So, something is wrong with the init string, but I have not discovered what yet. Pouring through AT command sets has given me quite a headache. They all have "examples", but they are simplistic like "AT&F1&M0", not one combining S registers with + commands.