Venta4Net
Venta4Net is a network fax and voice messaging solution based on the same technology as the well-known single-user VentaFax software and can be used on Windows 98/ME, NT 4. 0, 2000 and XP operating systems. Venta4Net allows sending faxes and voice messages from any networked computer (client)... It supports the additional capabilities of several modems such as caller's number delivery (Caller ID) and distinctive ring service. ... User rights also determine the accessibility of specific information.
http://www.venta4net.com/files/v4n_trial.exe - 4Mb - Download - Screenshot

VentaFax & Voice
VentaFax is a full-featured fax and answering machine software with color fax support. It sends and receives faxes and turns your PC with a fax modem into a versatile answering machine with remote control and email integration. You can retrieve your fax and voice messages from any touchtone... Distinctive Ring service (if supported by your modem) is available even in Windows XP! ... Find this and even more in VentaFax Business version. ... Need mass fax and voice mails broadcasting? ... Need unlimited automated message delivery?
http://www.ventafax.com/files/vfvh57i.exe - 4Mb - Download - Screenshot

VentaFax Business
VentaFax is a powerful fax/voice messaging software boasting features and reliability available only in high-end products, but cheaper and less greedy to the system resources. It sends and receives faxes, and converts your PC with a fax-modem into a versatile answering machine with remote control. ... Distinctive Ring service (if supported by your modem) is available even in Windows XP! ... Find this and even more in VentaFax Business version. ... Need mass fax and voice mails broadcasting? ... Need unlimited automated message delivery?
http://www.ventafax.com/files/vfvh561i.exe - 3Mb - Download - Screenshot