Well...found a DLL called ActiveComPort that's free and plugged it into a .NET project and it dials just fine with the ATDT command and ATH hung up as expected. SWEET!
I just had to dig up my rusty old AT lists to fix a dos based voice mail system. The old 2400 baud modem it used (!) finally croaked. The vendor went out of biz so I had to figger out a 33.6 and reset the command strings and such.
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