U-Fax is a fax server

Fax server

A fax server is a system installed in a local area network server that allows computer users whose computers are attached to the LAN to send and receive fax messages...

 software system

Software system

A software system is a system based on software forming part of a computer system . The term "software system" is often used as a synonym of computer program or software; is related to the application of systems theory approaches in software engineering context and are used to study large and...

 for Unix

Unix

Unix is a multitasking, multi-user computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs, including Ken Thompson, Dennis Ritchie, Brian Kernighan, Douglas McIlroy, and Joe Ossanna...

 server

Server (computing)

In the context of client-server architecture, a server is a computer program running to serve the requests of other programs, the "clients". Thus, the "server" performs some computational task on behalf of "clients"...

s, produced by Beacon Computer Services, in the UK. It is subject to a proprietary

Proprietary software

Proprietary software is computer software licensed under exclusive legal right of the copyright holder. The licensee is given the right to use the software under certain conditions, while restricted from other uses, such as modification, further distribution, or reverse engineering.Complementary...

 licence.

The software include API

Application programming interface

An application programming interface is a source code based specification intended to be used as an interface by software components to communicate with each other...

s to facilitate embedding faxing functionality in other server applications.

Client interfaces include e-mail

E-mail

Electronic mail, commonly known as email or e-mail, is a method of exchanging digital messages from an author to one or more recipients. Modern email operates across the Internet or other computer networks. Some early email systems required that the author and the recipient both be online at the...

, virtual printer

Virtual printer

A virtual printer is a piece of computer software whose user interface and API resemble that of a printer driver, but which is not connected with a physical computer printer....

s, and special bundled client software. The client software is available in versions for Unix/Linux (running under X

X Window System

The X window system is a computer software system and network protocol that provides a basis for graphical user interfaces and rich input device capability for networked computers...

), and Windows

Microsoft Windows

Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...

; it allows the sending and receiving and management of faxes, and administration of user settings including coverpages.

The company also produces Fax2Send

Fax2Send

Fax2Send is a fax server software system produced by Beacon Computer Services, in the U.K. It is subject to a proprietary licence.The system is available in versions for Linux and Solaris operating systems. It includes APIs to facilitate embedding faxing functionality in server applications.Client...

, for smaller Linux

Linux

Linux is a Unix-like computer operating system assembled under the model of free and open source software development and distribution. The defining component of any Linux system is the Linux kernel, an operating system kernel first released October 5, 1991 by Linus Torvalds...

 and Solaris

Solaris Operating System

Solaris is a Unix operating system originally developed by Sun Microsystems. It superseded their earlier SunOS in 1993. Oracle Solaris, as it is now known, has been owned by Oracle Corporation since Oracle's acquisition of Sun in January 2010....

installations.