Technical Spec´s WAN T1U *

© Farsite Communication Ltd. • 2012


The FarSync T1U card and software is designed to provide high performance hardware communications solutions for business, government and the military who need a Universal PCI sync communications card. The product includes a low level driver that allows access to the communications features available in the hardware. The card can optionally use the host's standard TCP/IP protocol stack to allow access to IP based networks such as the Internet. The FarSync SDK provides a Developers Toolkit for the product.

The card will support a sync line at speeds of up to 10Mbits/s continuous. The highly flexible universal network connector supports RS232C, X.21, RS530 (RS422 signalling), RS449 and V.35 network interfaces.

The FarSync T1U card supports PC connections to secure BRENT units using an X.21 connection.

The product is supplied with a 5 year warranty.

Features under Windows:

The Windows based API common to the entire range of FarSync cards/devices is referred to as the FarSync Windows API (FsWinAPI). This is an extension of the MS COMM API and enables, for example, applications developed to support COM ports, to be easily ported to use FarSync support in synchronous modes. This standardization enables the API to also be readily accessible from higher level environments such as .NET, C#, VB etc.

The FsWinAPI provides applications with direct access to the card's communications port/s for bit sync (HDLC) framing and also transparent bitstream operation for video and voice type applications.

The FarSync T1U can also be installed to appear as a NDIS (LAN) interface so it can simply use the TCP/IP stack over PPP to allow access to IP based networks such as the Internet.

The FarSync T1U installs seamlessly under Windows 7, Windows XP, Vista, Windows Server 2003 and Windows Server 2008 on both 32 and 64 bit, single and multi-core systems. The FarSync drivers are signed by Microsoft for easy installation.

LabVIEW applications can access this adapter.

Features under Linux:

The low level API is based on the raw socket interface and supports bit sync (HDLC) framed and transparent bitstream data. The T1U card can also use the TCP/IP stack to allow access to IP based networks such as the Internet.

The T1U card installs seamlessly as a plug and play device under the popular Linux 32 and 64 bit distributions. The cards supports Linux kernel version 2.4 and 2.6 in 32 and 64 bit formats, including the leading distributions supplied by Redhat, SuSE, Mandriva, Debian, Ubuntu, Fedora, Slackware and more. Multi-processor systems are supported.

FarSite is committed to supporting the FarSync T1U on new versions of Linux and Linux kernels as they are released. The source code for the driver is supplied with the product allowing rebuilding by the end user for use with almost any of the current or future Linux variants.

MikroTik Router:

The FarSync T1U may be installed and used in the MikroTik router products as a synchronous line card.

Developers Toolkit:

The FarSync SDK provides a Developers Toolkit with full documentation, useful utilities, such as a line monitor, and many sample applications for Linux and Windows. Free support from FarSite's Engineering department is provided to customers purchasing the FarSync SDK who have technical questions using the API.

Typical Applications

The FarSync T1U is suitable for a very wide range of uses; some typical applications include:

        • High speed multi-port HDLC framing support for non standard or specialist protocols
        • Interfacing DAB ETI (Ensemble Transport Interface - ETSI EN 300 799) transparent bit streams to Servers
        • Interfacing MPEG Video bit streams T-DMB ETI to Servers
        • Interfacing high speed MPEG Video bit streams to Servers
        • Connection to secure BRENT units
        • Watchdog systemsData generators for test systems
        • Engineering monitoring and control systems
        • Internet Access and remote office access over leased lines
        • HDLC framing support for non standard or specialist protocols
        • Sync card in a MikroTik router.

FarSync T1U - Product Details

The FarSync T1U is supplied with software drivers for Windows and Linux. This includes a low level driver that allows access to the communications features available in the hardware and an optionally installable driver that connects with the standard TCP/IP protocol stack to allow access to IP based networks such as the Internet.

Card Hardware

The 1 port card runs an AMD processor with SRAM. The card has an embedded HDLC / transparent controller with SDMA access (128 buffers) and a wide range of timers. The whole memory space may be mapped via the PCI interface to the PC/Server. Total bandwidth supported by the card is 20 Mbits/s.

Network Interfaces

The multi function line drivers available support X.21 (V.11), V.35, RS232C (V.24, X.21bis), RS530 (EIA530, RS422), RS449 (RS422) , network interfaces, all soft configurable and ESD protected from static charges. The maximum supported line speed is 10 Mbits/s full duplex.

Clock Generation

As well as external clocking the T1U supports card generated clocks at 9600, 19200, 38400 and 76800 speeds. Note: if a wider range of clock speeds are required the 2 port FarSync T2U should be used instead.

PCI Bus Specification

The FarSync T1U card is suitable for systems with a PCI or PCI-X bus, covering single processor systems, multi-processor systems and processors featuring HyperThreading technology. The card is PCI revision 2.2 compliant with support for both 3.3 and 5 volt signalling, the power for the card is taken from the 3.3 volt supply rail. The FarSync T1U card may be fitted in either 32-bit PCI bus slots or 64-bit PCI-X bus slots as this Universal PCI card will work perfectly well in both.

Key Features supported on Linux

The FarSync T1U installs seamlessly under Linux kernel series 2.4 and 2.6 on both single and multi-core 32 and 64 bit systems. All the popular distributions are supported including Red Hat, SuSE, Slackware, Ubuntu, Mandriva, Debian and Fedora.

Installation is simple, the driver is dynamically loadable so a kernel rebuild is not required for the driver to be installed. The driver acts as a dynamically loadable module. The link level protocol can be PPP, Cisco HDLC or Frame Relay with optional authentication by CHAP, MSCHAP or PAP (RFC 1334) providing a standard point-to-point network interface. The driver is supplied with source code.

The Raw Sockets API allows applications developed using the FarSync SDK to access the full feature set of the hardware, these include bit sync (HDLC framed) data, and transparent bitstream data in signal mode NRZ.

A configuration utility is provided to set the line speed, interface type and protocol, after which the ports may be configured with standard networking tools.

Key Features supported on Windows

The FarSync T1U installs easily under Windows 7, Windows Vista, Windows XP, Windows Server 2003 and Windows Server 2008 on single or multi-core 32 and 64 bit systems. A FsWinAPI driver is installed with the optional installation of an NDIS (LAN) driver. The NDIS driver supports TCP/IP running over PPP with optional authentication by CHAP or PAP (RFC 1334) providing a standard point-to-point network interface. The drivers are signed by Microsoft for easy installation. Applications running in LabVIEW can access the card.

The product is supplied with a comprehensive configuration utility and its own Line Monitor that allows the user to record, display and store line traffic with WAN protocol decoding for fast debugging.

The FarSync T1U FsWinAPI allows applications developed using the FarSync SDK to exactly control the type of data sent and received in bit sync (HDLC framed) and transparent bitstream formats in NRZ signal mode.

FarSync SDK - The Developers Toolkit

The SDK includes support for writing applications on both Linux and Windows and contains documentation, working sample applications, development and test utility applications. There is everything a user needs to rapidly develop and test a wide variety of applications such as specialist sync (HDLC framed) protocols or transparent bitstream data requirements including Audio, MPEG Video T-DMB and DAB ETI with bitstream encoder and decoder. The FarSync SDK is ordered separately from the FarSync T1U.


For Windows configuration is by a GUI application

The line can be reconfigured and restarted without reloading the software. There is context sensitive help and an on-line manual should it be required. An advanced tab permits users to further specify the configuration of the line if necessary. For Linux a configuration utility is provided; alternatively text files can be used.

FarSync T1U- Software Technical Specifications


Distribution Support

Distributions by Red Hat, SuSE, Slackware, Mandriva, Ubuntu, Debian, Fedora and more.
Drivers for kernel series 2.4 and 2.6 on both single and multi-core 32 and 64 bit systems

Kernel Support

All sub versions of kernel releases from 2.4.2 and 2.6.1

Protocol Supported

TCP/IP, PPP, Cisco HDLC, Frame Relay, CHAP, MSCHAP, PAP (RFCs 1661, 1332, 1334)

API and Interfaces

Raw Sockets API


O/S Types

Windows 7, Windows XP, Windows Vista, Windows Server 2003, Windows Server 2008, LabVIEW running on a Windows O/S.
32 and 64 bit (single and multi-core systems)

Protocol Supported

TCP/IP, PPP, CHAP, PAP (RFCs 1661, 1332, 1334)

API and Interfaces

FsWinAPI, NDIS (LAN) where the line appears as a LAN interface


Line Monitor to record, display and store line traffic included



RouterOS versions 3.15 to 4.

Hardware Technical   Specifications

Card type and PCI specification

AMD processor with SRAM and quad port sync   controller,
Universal PCI (PCI-X compatible, PCI v2.2 compliant), bus mastering, DMA enabled,
Supports 3.3 & 5 volt PCI signalling,
Suitable for 32 and 64 bit PCI bus slots

Physical characteristics

Short card (height 107mm, length 167mm)

Network connections supported

X.21 (V.11) - DTE 15 pin male   D type,
V.35 - DTE MRAC-34   male 'brick' type,
RS232C (V.24, X.21bis) - DTE 25 pin male D type,
RS530 (RS422) - DTE 25 pin male D type,
RS449 (RS422) - DTE 37 pin male D type.

Link speed range sync

RS232C: up to 128 Kbits/s
X.21, V.35, RS530 (RS422), RS449 (RS422): up to 10 Mbits/s

Line Signal Modes


ESD protection

Littelfuse high speed ESD and over-voltage protection


LED   displaying line status


EN55022 class B, CE, FCC class B

Power requirements

< 850 mA @ +3.3v
< 5 mA @ +/- 12v (for ESD suppression) 
< 2.8 watts


339,766 hours - calculation based on Bellcore Method 1 Case 3, 40 deg.C ambient, 15 deg.C case temperature rise above ambient.

Line clocking   (internal/external)

External and card generated line clocking is supported. 
Internal clock range 9600, 19200, 38400 and 76800 baud on RS232C, X.21 and RS449 connections.
No special cables are required to use card generated clocks on RS232C, X.21 and RS530 (RS422). Dual clocking is available on V.11. 
Internal clocking is supported on V.35 and RS449 with the use of cables designed for card generated clocks.

Note: If a wider range of clock speeds are   require to be generated by the card the FarSync T2U should be used instead


5 years

RoHS Compliant


* All specifications are subject to change