Can I install both the ShareISDN Client and an ISDN card on one computer?
There can be only one CAPI interface in the system. Both the Client and the ISDN card will try to install a file called “capi2032.dll” into the System/System32 folder. If you keep a copy of that two versions, you can switch between the Client and the card by replacing the file. You can also put one version into the application folder of an ISDN application and leave the other in the System/System32 folder.