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One or more telephone device drivers are incompatible with tapi.dll
windows 7 64bit ucm 8.6
Answer
5/4/12 12:01 AM
My customer is trying to use the Cisco 8.6 TSP with Windows 7 64 bit. We have the TSP installed and configured correctly. When we launch dialer to test it, we get the following error:
 
“one or more telephone device drivers are incompatible with tapi.dll.  install an updated version.”
 
Has anyone experienced this and if so, how have you gotten past it?
 
Thanks.
Dustin
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RE: One or more telephone device drivers are incompatible with tapi.dll
Answer
5/10/12 8:05 PM as a reply to Engineering Department.
I also have this problem, and have not found a solution. I am also using Cisco 8.6 with Win 7 64 bit.
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RE: One or more telephone device drivers are incompatible with tapi.dll
Answer
6/15/12 10:57 PM as a reply to Thomas Dravecz.
Which specific version of Win 7 and service pack are you using?  There are 32-bit and 64-bit versions of the TSP available on UCM, have you confirmed the 64-bit version is the one installed?
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