Finally back faxes over Win Server 2008 R2

After a long search, finally found a fax modem, the 2008 R2 server is recognized as a modem on a virtual (ESXi 4.1) installed Windows.
Fax reception and shipping is running again for the whole office. The problem was when installing that obviously COM3 is used, and this was not installed on the VPS. After booting the ESXi but went also.
The fax modem is connected via Silex 3000GB (Lan to USB) connector. This means I can use the Windows (Fax) Server back on my hosts and forth, the connection even stands during the host move, because the signal from the Windows server is redirected to the network card for Silex connector, and this until the signal forwards it to the USB modem. A great thing for virtualization.