You need this update, if you use Win95-Systemdriver (>=3.08) and miroOFFICE 3.0 
or miroCENTER 3.0.
First make a copy of the old DLL-files and then replace the DLL-files. 
You will find them in follwering directory:
\MCO30\VOICE or \MCC30\VOICE.

e.g.
cd\mco30\voice
copy faxtam.dll faxtam.org
copy voiceapp.dll voiceapp.org
copy a:faxtam.dll 
copy a:voiceapp.dll


