One ISDN card is enough and Plus receives and sends your faxes. Those are saved as pictures and you can send them e.g. to your outlook. So your net becomes a Unified Messaging Network. These mails are delivered to your working place and can be viewed e.g. with the Internet Explorer. You can choose a file format between PNG, JPEG TIF. Also the size of your pictures are electable. In the light of the numbers (MSNs) for direct dialing f