FarSync X25 T2Ue
The FarSync X25 T2Ue PCIe card provides 2 high performance X.25 communications lines for Linux and Windows systems. A PCI version is also available.
Overview
* This product is no long available and has been superseded by the FarSync X25 K2Ee.
The FarSync X.25 T2Ue product 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 PCIe card will support 2 X.25 lines at speeds to over 2.048 Mbits/s. The highly flexible universal network connector supports RS232, X.21, RS530, RS449 and V.35 network interfaces.
A PCI version of the adapter, the FarSync X25 T2U is available too.
The products are supplied with a 5 year warranty.
- The FarSync adapters install easily under Windows 11, 10, Windows Server 2025, 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.
- 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
Product details
Both PCIe and PCI 2 x.25 port cards comprise an AMD processor with SRAM. The whole memory space may be mapped via the PCIe interface to the PC/Server. The card has an embedded HDLC / transparent controller with SDMA access (128 buffers per port) and a full range of timers.
Network Interfaces
The multi function line drivers available on all the ports support X.21 (V.11), V.35, RS232 (V.24, X.21bis), RS530 (EIA530, RS422) and RS449 network interfaces, all soft configurable and ESD protected from static charges.
X.25 line speeds can be 2.048 Mbits/s or more
Clock Generation
As well as external clocking the adapter support card generated clocks at a wide range of standard frequencies from 9,600 baud to 8.192 Mbits/s and dual clocks can be generated in V.11 mode if required. The clocking speed of all ports is individually selectable.
Multiple Cards
The drivers supplied with Windows and Linux allow large numbers of ports to be supported by the installation of multiple FarSync cards in a Server. Typically 12 or more cards (24+ ports) can be supported; the card limit is only dependent on the resources available in the host Server and the total bandwidth of the PCIe/PCI/PMC bus.
PCI Express Bus Specification
FarSync PCIe cards are suitable for systems with a PCIe bus, covering single and multi-processor systems. These cards are compliant with PCI Express Base specification revision 1.0a and above. The FarSync adapters are bus mastering, 1x (single lane) cards.
FarSync PCI cards comply with the Universal PCI (PCI-X compatible, PCI v2.2 compliant) specification. These bus mastering cards are suitable for systems with a PCI bus, covering single and multi-processor systems.
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.
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 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.
| Windows support | The FarSync adapters install easily under Windows 11, 10, Windows Server 2025, 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. |
| Linux support | 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. |
| SMP (Multi-Processor Systems) | The software has been designed for and tested on SMP Servers |
| 32 and 64 bit systems | The FarSync X25 cards can be used on 32 and 64 bit systems using Intel/AMD X86/x64 type processors under Linux and Windows with 32 or 64 bit applications |
| X.25 Features | |
| X.25 CCITT compliance | 1980, 84 & 88 |
| DTE/DCE operation | Both and Automatic detection and selection |
| Maximum SVCs (all types) | 254 sessions on each line, any mix of bothway, incoming and outgoing. 4,095 sessions using the optional High Capacity Pack (see Order Information), any mix of bothway, incoming and outgoing |
| Maximum PVCs | 254 sessions on each line. 4,095 sessions using the optional High Capacity Pack (see Order Information) |
| Maximum simultaneous connections | 254 connections on each line. 4,095 connections with the optional High Capacity Pack (see Order Information) |
| Data Packet size range | 0 to 4,096 bytes |
| Data packets per second throughput | More than 2,000 pps |
| X25 facilities supported | Reverse charging, Closed User Group (CUG), Network User Identifier (NUI), Fast Select, Packet and Windows size negotiation, Extended sequence numbering (128), Throughput Class Negotiation. |
| Types of network connection | X.25 packet switch, leased line, dial up (X.32 and dial on DTR) |
| Accessible via API | Four APIs, a Sockets based interface, a Java API and a legacy NCB API. |
| IP over X.25 | Supported, complies with RFC 1356 on Linux and Windows |
| X.25 switch | X.25 Switch daemon available on Linux for free download for use with FarSync X25 adapters |
| XOT Option Features | |
| XOT Specification | Complies with RFC 1613 - X.25 over TCP (XOT) |
| Maximum XOT connections | 4,095 on Linux, |
| Maximum SVCs and PVCs | 4,095 on Linux,, any mix of SVCs and PVCs |
| Data packets size range | 0 to 4,096 bytes |
| OOB (Out of Band) data | Supported for Interrupts, Resets and the D bit |
| X25 facilities supported | Closed User Group (CUG), Network User Identifier (NUI), Fast Select, Packet and Windows size negotiation, Throughput Class Negotiation. |
| Accessible via API | Two APIs, a Sockets based interface, a Java API |
| ISO Transport Features | |
| Supplied with the X.25 software | Included with both the standard product and the High Capacity Pack |
| Standard supported | ISO 8073 (connection oriented) |
| Classes supported | Classes 0, 1, 2 and 3 |
| Negotiation between classes | Yes |
| Simultaneous transport connections | 254 sessions on each line. 4,095 sessions using the High Capacity Pack |
| TPDUs in a NSDU | 1 |
| Accessible via API | Yes |
| Developers Toolkit | |
| X.25 Developers Toolkit and API details | |
| Card type and PCI specification | AMD processor with SRAM and dual port synchronous controller, PCIe bus compliant with PCI Express Base Specification Revision 1.0a, x1 (single lane), Bus mastering card The PCI version is Universal PCI (PCI-X compatible, PCI v2.2 compliant) |
| Physical characteristics | Short card (height 107mm, length 167mm) |
| Multiple cards | The drivers supplied with Windows and Linux allow large numbers of ports to be supported by the installation of multiple FarSync cards in a Server. Typically 12 or more cards (24+ ports) can be supported; the card limit is only dependent on the resources available in the host Server and the total bandwidth of the PCIe/PCI/PMC bus. |
| Network connections supported | 2 ports, any mix of the network connectors listed below RS232 – DTE DB25M connector, DCE type cables are also available |
| Link speed range | RS232: up to 128 Kbits/s X.21, V.35, RS530 (RS422), RS449 (RS422): up to 10 Mbits/s |
| Line Signal Modes | NRZ |
| ESD protection | Littelfuse high speed ESD and over-voltage protection |
| Indicators | 4 LEDs displaying line status |
| Approvals | EN55022 class B, CE, FCC class B |
| Power requirements | < 1.2 A @ +3.3v < 5 mA @ +/- 12v (for ESD suppression) < 4 watts |
| Operating Temperature Range | 0 to 60°C ambient air temperature. |
| MTBF | PCIe adapter: 284,027 hours PCI adapter: 295,857 hours Calculation based on Bellcore Method 1 Case 3, 40°C ambient, 15°C case temperature rise above ambient. |
| Line clocking (internal/external) | External and card generated line clocking is supported. The clock speed is independently selectable on each port. Card generated clock range 9,600 baud to 8,192 Mbits/s. No special cables are required to use card generated clocks on RS232, X.21 and RS530 (RS422). Internal clocking is supported on V.35 and RS449 with the use of cables designed for card generated clocks |
| Cable type compatibility | Cables are ordered separately see the Order Information section |
| Warranty | 5 years |
| Compliance | RoHS2, REACH |
Order Information
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
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.
| FarSync X25 T2Ue | Intelligent 2 port X.25 PCI Express (PCIe) card with X.25 Software and the X.25 Developers Toolkit for Windows and Linux included. | FS6250 |
| FarSync X25 T2U | Intelligent 2 port X.25 PCI card with X.25 Software and the X.25 Developers Toolkit for Linux and up to Windows 10 and Server 2019 included. | FS6240 |
| Software Options | ||
| FarSync X.25 High Capacity Pack for Windows | Upgrade to the standard Windows FarSync X.25 software that allows up to 4095 simultaneous sessions | FS9504 |
| FarSync X.25 High Capacity Pack for Linux | Upgrade to the standard Linux FarSync X.25 software that allows up to 4095 simultaneous sessions | FS9505 |
| FarSync XOT Extension | An optional upgrade to add XOT (X.25 over TCP/IP) with FarSync X.25 cards on Linux. A FarSync X25 card must be purchased with this product. | FS9508 |
| UCR1 | Single RS232 (V.24, X.21bis) DTE cable. DB25M connector, 1.5 metres, see pinouts | FS6061 |
| UCX1 | Single X.21 (V.11) DTE cable. DB15M connector, 1.5 metres, see pinouts | FS6062 |
| UCV1 | Single V.35 DTE cable MRAC-34 (V.35M) connector, 1.5 metres, see pinouts | FS6063 |
| U530 | Single RS-530 (EIA530, RS422) DTE cable DB25M connector, 1.5 metres, see pinouts | FS6064 |
| UX35C | Single V.35 special DCE cable MRAC-34 (V.35F) connector, where the DCE generates clocks, female connector, 1.5 metres. | FS6095 |
| Test-T2U | Loopback connector attaches to the adapter for testing the communication ports. | FS6024 |
| Null-MX | General purpose X.21 double shielded crossover cable, DB15F connectors, 0.5 metres. Converts the DTE presentation into a DCE, see pinouts | FS6090 |
| X21-EXT | X.21 double shielded 15 metre extension cable, DB15F to DB15M | FS6091 |
| Null-MR4 | RS232 and RS530 (EIA530, RS422) double shielded crossover cable, DB25F connectors, 0.5 metres. Converts the DTE presentation into a DCE. | FS6097 |
| X.21-449-INT | X.21 to RS449 (DB37F connector) - conversion cable, for use when FarSync adapter generates the clock, 0.5 metres, see pinouts | FS6093 |
| X.21-449-EXT | X.21 to RS449 (DB37M connector)- conversion cable for use when the clock externally generated (DCE Clock), 0.5 metres, see pinouts | FS6094 |