For the answering machine function of the ISDN card, you need to install software to have the function. Such as the optional bundled software RVS-COM lite.
If you have any successful experience in receiving files (Eurofile transfer or T.70NL) by CommCenter, it will be very easy for you to use the answering machine function.

Please follow the procedures below to open the answering machine:
From the main window of the CommCenter, go into the 'properties'. In the 'Autoanswer', check the 'Voice' and set the MSN for it. Go into the 'Answer phone' to select the desired announcement WAV file, or you can just use the default announcement. Then, you can call the MSN of the answering machine to check if it works.