FarSync Flex X25

The FarSync Flex X.25 adapter is a high quality X.25 solution for business, government and military applications, it has been developed to provide high performance, versatile X.25 connectivity for Linux and Windows systems.

The bus powered V3 version of the USB adapter will support an X.25 line at speeds of up to 2.048 Mbits/s. The highly flexible universal network connector supports RS232, X.21, RS422, RS530, RS449 and V.35 network interfaces. Line signal encoding modes NRZ, NRZI, FM0, FM1, Manchester Encoding or Conditioned Diphase can be used.

• The FarSync adapters install easily under Windows 11, 10, 8.1, Windows Server 2022, 2019, on single or multi-core 32 and 64 bit systems. The FarSync drivers are signed by Microsoft for easy installation. For use on earlier Windows versions contact FarSite.
• The X.25 software has a host of features including ISO Transport (classes 0 to 3), support for OpenFT FTAM, a WinSock2 compliant Sockets API and a Java API. The Sockets API is also accessible from .NET applications. Up to 4095 connections can be supported using the FarSync X25 High Capacity Pack or 254 per port as standard.
• IP over X.25 support is included permitting TCP/IP operation over an X.25 network.
• 32 and 64 bit applications supported.

A comprehensive Developers Toolkit for development using APIs to X.25 and ISO Transport is supplied with each X.25 product including many sample applications.

A multi-port Line Monitor and a Line Statistics application are also supplied.

• The X.25 card installs seamlessly as a plug and play device. SMP (multi-processor) systems are supported.
  FarSync adapters support Linux kernel versions from 2.6.12 onwards, in 32 and 64 bit formats, including the leading distributions supplied by Red Hat, SuSE, CentOS, Ubuntu, Debian, Fedora, Slackware and more.
  FarSite is committed to supporting FarSync adapters on new versions of Linux and Linux kernels as they are released.
  Configuration is by a Java based GUI.
• There are APIs to the X.25 layer, a Sockets based interface and a Java API. There is also an API to the ISO Transport layers (ISO 8073 – connection oriented).
• IP over X.25 support is included permitting TCP/IP operation over an X.25 network.
• XOT (X.25 over TCP/IP) support is available as an option, using the same API’s as X.25. XOT can operate at the same time as X.25.
• Up to 254 connections per port are supported as standard or up to 4095 connections using the FarSync X25 High Capacity Pack.
• The source code for the driver and the libraries for the API are supplied with the product, allowing rebuilding by the end user for use with almost any of the current or future Linux variants.

A comprehensive Developers Toolkit for development using APIs to X.25 and ISO Transport is supplied with each X.25 product including many sample applications.

A multi-port Line Monitor and a Line Statistics application are also supplied.

The card is suitable for connection to all types of X.25 networks, X.25 over the ISDN D channel and leased lines. Typical applications include:

• Private X.25 networks such as Police, Customs, Military, Fishery, Financial, Government and Airline
• E-Commerce gateways for credit verification
• Mixed X.25 and IP networks
• SMS message gateways
• Billing and Mediation
• FTAM access
• ATM connections
• Lottery terminals
• X.400
• PC / Server based X.25 switch with XOT

The card is compatible with all public X.25 networks.

The intelligent FarSync Flex X.25 has been designed for easy installation and to provide high performance in a variety of environments. The Flex adapter uses an ARM processors with Flash for the on board code.

• 254 simultaneous SVC and PVC virtual connections or 4095 per port using the High Capacity Pack
• XOT (X.25 over TCP/IP) support available as an option on Linux
• Over 2,000 X.25 packets per second
• Line speeds of up to 2.048 Mbits/s
• Network interfaces for X.21 (V.11), V.35, RS232, RS449 and RS530 (EIA530, RS422)
• Line signal modes NRZ, NRZI, FM0, FM1, Manchester Encoding or Conditioned Diphase up to 2.048 Mbits/s
• USB 2.0 high-speed mode (480mb/s) USB 3 and USB 1.1 compatible
• High efficiency, USB Bus powered, energy saving design
• Internal and external line clocking
• Dual bank flash for secure in field upgrades and previous system restore capability
• Optional mounting brackets

Application developers have a choice of APIs for X.25 and ISO Transport. An API selector guide is provided to assist the developer in choosing the most appropriate interface.

The comprehensive Developers Toolkit is included with the product. For further information see: X.25 Developers Toolkit and API details

The IP over X.25 support is included as part of the FarSync X25 product and is integrated into Linux and Windows.

Linux Features: IP over X.25 support complies with RFC 1356 (IP over X.25). Higher level protocols that run over IP including TCP, UDP, HTTP and FTP are supported.

Windows Features: The IP over X.25 support complies with RFC 1356 (IP over X.25), for single and multiple X.25 destinations. Higher level protocols that run over IP including TCP, UDP, HTTP and FTP are supported.

See further details about how X.25 and IP over X.25 works

The XOT extension allows applications using the same API to transmit data over XOT (X.25 over TCP/IP). TCP/IP is normally routed over Ethernet on PCs and Servers. The XOT support is compatible with FarSite’s FarLinX Mini Gateway for X.25 and also other manufacturers XOT products. The XOT and X.25 interfaces can be used simultaneously.

The FarSync XOT Extension should be ordered at the same time that the FarSync X25 card is purchased, although a retrofit is possible.

Notes:
There is also FarSync XOT Runtime software for Linux available that allows XOT to run over the PCs standard TCP/IP connection such as an Ethernet card.

An optional high capacity pack is available for FarSync X25 adapters. The FarSync X.25 High Capacity Pack allows up to 4,095 simultaneous connections to be made; a huge increase from the standard 254 on each line. The expanded capacity applies to SVC, PVC and ISO Transport connections.

Customer applications developed to use the standard X.25 Sockets API are compatible with the FarSync X25 High Capacity Pack.

The FarSync X.25 High Capacity Pack is available for Windows and Linux, it should be ordered at the same time that the FarSync X25 adapter is purchased although a retrofit upgrade is possible. One FarSync X.25 High Capacity Pack is required per card. Further details are listed in the Order Information section.

For both Windows and Linux configuration is by a GUI configuration application, rapid installation and easy configuration are key features of the product. See the sample screens.

The X.25 line can be reconfigured and restarted without reloading the software.

Many of the parameters such as DTE / DCE selection are determined automatically. Selecting the line speed by default automatically sets suitable timer and retry values. An advanced tab permits users to exactly specify the configuration of the line if necessary.

The Configuration in Linux can also be optionally configured by a text file.

The X.25 software firmware, drivers, utilities and the X.25 Developers Toolkit are all included with the FarSync adapter. Line cables are ordered separately.

The software and documentation is downloaded from this website using a code supplied with the FarSync X25 adapter, it includes:

• Drivers for Linux and Windows.
• Numerous example applications with source code
• Documentation for all the APIs in Adobe PDF format
• Source code for Linux drivers and API Libraries
• Network monitor and various useful utility programs
• USB connected products include a USB-F cable

New releases of the software with enhancements and fixes are made available for free download from the Download page in the Support section of this web site.