To do color faxes possible, appropriate software that allows the sending and receiving of color faxes should be installed at your computer.
To send and receive color faxes over VoIP or ISDN, you should download and install Venta Fax software and configure it to operate with Fax Voip T.38 Modem. Detailed instructions on how to configure Venta Fax to send and receive color faxes can be found in the Using Fax Voip T.38 Modem with Venta Fax and Voice chapter of this manual.
We have also tested some other programs to send and receive color faxes. Unfortunately, all the other software implementations for color faxes are very poor and can not be used to send and receive color faxes over VoIP networks, no matter which side they are.