Technical Spec´s X.25 T4U *

© Farsite Communication Ltd. • 2012

Overview

The FarSync X.25 T4U 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 Universal PCI card will support 4 X.25 lines at speeds to over 2.048 Mbits/s. The highly flexible universal network connector supports RS232C, X.21, RS530, RS449 and V.35 network interfaces.

Features under Linux:

The T4U card installs seamlessly as a plug and play device under the popular Linux 32 and 64 bit distributions. The card supports Linux kernel version 2.6 in 32 and 64 bit formats, including the leading distributions supplied by Redhat, SuSE, Mandriva, Debian, Ubuntu, Fedora, Slackware, CentOS and more. SMP (multi-processor) systems are supported. 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 line are supported as standard or up to 4095 connections using the FarSync X25 High Capacity Pack.

FarSite is committed to supporting the FarSync X25 T4U on new versions of Linux and Linux kernels as they are released. 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.

Features under Windows:

The T4U card installs seamlessly as a plug and play device under Windows 7, Windows XP, Vista, Server 2003 and Server 2008. 32 and 64 bit Windows operating systems are supported.

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, a Java API and a COM Port 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 line as standard.

IP over X.25 support is included permitting TCP/IP operation over an X.25 network.

X.25 Developers Toolkit: A comprehensive Developers Toolkit for development using APIs to X.25 and ISO Transport is included with each product covering Linux and Windows. A multi-port Line Monitor and a Line Statistics application are also supplied.

Typical Applications

The FarSync X25 T4U 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 Lottery, 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
        • X.400
        • PC / Server based X.25 switch and an XOT Option

FarSync X25 T4U - Hardware Details

The FarSync X25 T4U 4 line card runs an AMD processor with SRAM and an embedded HDLC controller connected to the Server/PC through an Universal PCI bus.

Network Interfaces

The 4 line multi function drivers 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. Line speeds to over 2.048 MBits/s are supported.

Clock Generation

External (line generated) clocking is supported. The T4U also supports card generated clocks speeds from 9600 baud to 8.192 Mbits/s, each line can be set to a different speed.

PCI Bus Specification

The FarSync X25 T4U card is suitable for systems with a PCI or PCI-X bus, covering single processor and multi-processor systems. 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 X25 T4U 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.

Multiple Cards

The drivers supplied with Windows and Linux allow large numbers of lines to be supported by the installation of multiple FarSync X25 T4U cards in a Server. Typically 12 or more cards can be supported (48+ lines); the card limit is only dependent on the PCI / PCI-X slot count and resources available in the host Server and the total bandwidth of the PCI bus.

TCP/IP over X.25

The IP over X.25 support is included as part of the FarSync X25 T4U 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.

APIs and X.25 Developers Toolkit

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.

FarSync XOT Extension option

For Linux 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 X25 Gateway and also other manufacturers XOT products. The XOT and X.25 interfaces can be used simultaneously.

The FarSync XOT Extension for Linux 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.

For Windows there is FarSync XOT Runtime software for Windows available that allows XOT to run over the PCs standard TCP/IP connection such as an Ethernet card.

FarSync X.25 High Capacity Pack option

An optional high capacity pack is available for the FarSync X25 T4U. 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 X.25 T4U is purchased although a retrofit upgrade is possible. One FarSync X.25 High Capacity Pack is required per card

 

Windows Port Manager showing configuration of a T4U for X.25

 

Linux Adapter Manager showing X.25 configuration of a T4U

Configuration

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

Packaging

The X.25 software firmware, drivers, utilities and the X.25 Developers Toolkit are all included on the CD-ROM supplied with the FarSync card. Cables are ordered separately.

The CD-ROM supplied with the FarSync X25 T4U includes:

        • Drivers for Linux, Windows 7, XP, Vista, Server 2003 and Server 2008
        • Numerous example applications with source code
        • Documentation for all the APIs in Adobe PDF format
        • Source code for Linux drivers and API Libraries

Software Technical Specifications

Operation Systems supported

Windows 7, Vista, XP, Windows Server 2003 and Windows Server 2008.
Linux distributions supplied by Redhat, SuSE, Mandriva, Debian, Ubuntu, Fedora, Slackware, CentOS and others with kernel version 2.6.

Linux Kernel support

All sub versions of kernel releases from 2.6.1 onward. The products may operate successfully with earlier versions of the kernel but no specific   testing has been undertaken by FarSite

SMP (Multi-Processor Systems)

The software has been designed for and tested on SMP and multi-core Servers

32 and 64 bit systems

The FarSync X25 T4U can be used on 32 and 64 bit systems under Windows and Linux


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 High Capacity Pack (any mix of bothway, incoming and outgoing).

Maximum PVCs

254 sessions on each line 
4,095 sessions using the High Capacity Pack

Maximum simultaneous connections

254 connections on each line
4095 connections with the High Capacity Pack

Data Packet size range

0 to 4096 bytes

Data packets per second   throughput

More than 2000 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, a COM Port API and   a legacy NCB API.

IP over X.25

Supported, complies with RFC 1356

X.25 switch

X.25 Switch daemon available on Linux for free download for use with   the FarSync X25 T4U


XOT Option Features

XOT Specification

Complies with RFC 1613 - X.25 over TCP (XOT)

Maximum XOT connections

1,000

Maximum SVCs and PVCs

1,000, 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

Accessible via API

Yes


Hardware Technical Specifications

Card type and PCI   Specification

Universal PCI (PCI-X   compatible, PCI v2.2 compliant),
AMD Processor embedded communications controller,
Intelligent Universal bus mastering PCI card,
Supports 3.3 & 5 volt signalling,
Suitable for 32 and 64 bit PCI bus slots

Physical characteristics

Short card (height 107mm, length 167mm)

Multiple cards

Yes, typically 12 or more cards (48+ lines) can be supported; the card limit is only dependent on the resources available in the host Server

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,X25
RS530 (RS422) - DTE 25 pin male D type,
RS449 - DTE 37 pin male D type

Link speed range

RS232C: 75 baud up to 128 Kbits/s
X.21, V.35, RS530, RS449, RS422: 75 baud to over 2.048 Mbits/s

ESD protection

Yes, Littelfuse high speed ESD and over-voltage protection

LED line status indicators

4 line status

Approvals

EN55022 class B, CE, FCC class B

Power requirements

< 1.75 A @ +3.3v
< 10mA @ +/- 12v (for ESD suppression only) 
< 6 watts

MTBF

238,319 hours - calculation based on Bellcore Method 1 Case 3, 40   deg.C ambient, 15 deg. C case temperature   rise above ambient.

Line clocking 
(external and card generated)

Card generated and External supported 
Card generated clock range 9,600 baud to 8,192 Mbits/s.
No special cables are required to use card generated clocks on RS232C, X.21   and RS530 (RS422). 
Card generated 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 FarSync product range and   compatible cables table for a list of cables available.

Warranty

5 years

RoHS Compliant

Yes

* All specifications are subject to change