Well I am the author of those patches and I'm afraid there is no chance that they will help Andreas case. It is an extreme hackish implementation of a data modem tailored to a single application. No notion of drivers, certainly no support for external drivers and control panel interface.
Thanks for your info. I talked with Mike McCormak and provided some more details of our problem and he estimated that with a couple of native dlls it could work - but the serial interface code could be a problem.
Has anybody more information about this?
If I got a little more time, I will create an registry access log regarding TAPI and try to move missing TAPI entries. Perhaps this will help to open the telephony control panel...
Andy