FarSync X.25 Adapters Overview and Product Comparison

The FarSync X.25 product family includes a range of USB, PCI express (PCIe), Universal PCI, PMC X25 adapters and XOT software developed to provide X.25 communications for Servers, PCs and Laptops running Linux and Windows.

The FarSync X.25 range of adapters have been developed to provide very high performance X.25 connectivity for Linux and Windows

The 2 and 4 port Universal PCI and 2 and 4 port PCI Express (PCIe) adapters in the range are capable of driving each line at speeds of over 2,048 Mbits/s with support for RS232, X.21, V.35, RS449, RS530 and RS422 network interfaces.

The USB adapter can support 1 port up to 2,048 Mbits/s with network interfaces RS232, X.21, V.35, RS449, RS530 and RS422.

The PMC adapters can support 2 ports and are capable of driving each line at speeds of over 2,048 Mbits/s with support for RS232, X.21, V.35, RS449, RS530 and RS422 network interfaces.

The X.25 software has a host of features including IP over X.25, a Sockets API, and a Java API. A comprehensive development toolkit that includes many sample applications for each API is supplied as part of the product. Using the High Capacity Pack up to 4095 connections can be supported on each line. For Linux there is an option of XOT support.

A fully featured GUI multi-port Line Monitor and a Line Statistics application is included with the products.

FarSync X.25 Products Comparison Table
FarSync X.25 adapter specification product comparison overview
Features can vary between the Linux and Windows implementations
USBPMCPCI / PCI-X (Universal PCI)PCI Express (PCIe)
Product NameFarSync Flex X25 FarSync X25 T2U-PMC-FFarSync X25 T2U-PMC-RFarSync X25 T2UFarSync X25 T4UFarSync X25 T4E+FarSync X25 T2UeFarSync X25 T2EeFarSync X25 T4UeFarSync X25 T4Ee
Product CodeFS6100FS6280FS6281FS6240FS6440FS6446FS6250 FS6256FS6450FS6456
Hardware Features
Adapter Bus TypeUSB 3.0 or 2.0 PMC (PCI mezzanine)

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.

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.


Max Port Count1 port 2 ports2 ports2 ports4 ports4 ports2 ports 2 ports4 ports 4 ports
Multiple adapters in a PC8 or more Multiple: PMC site count dependant Multiple: PMC site count dependant 12 or more 12 or more 12 or more 12 or more 12 or more 12 or more 12 or more
Network InterfacesRS232, X.21, V.35, RS449, RS530, RS422. Front and Rear I/O: RS232, X.21, V.35, RS449, RS530, RS422.Rear I/O: RS232, X.21, V.35, RS449, RS530, RS422.RS232, X.21, V.35, RS449, RS530, RS422.RS232, X.21, V.35, RS449, RS530, RS422.RS232, X.21, V.35, RS449, RS530, RS422.RS232, X.21, V.35, RS449, RS530, RS422.RS232, X.21, V.35, RS449, RS530, RS422.RS232, X.21, V.35, RS449, RS530, RS422.RS232, X.21, V.35, RS449, RS530, RS422.
Line signal encodingNRZ, FM0, FM1, NRZINRZNRZNRZNRZNRZ, FM0, FM1, Conditioned diphase, Manchester encodingNRZNRZ, FM0, FM1, Conditioned diphase, Manchester encodingNRZNRZ, NRZI, FM0, FM1, Conditioned diphase, Manchester encoding
Adapter SizeN/APMC cardPMC cardHalf cardHalf cardHalf cardHalf cardLow profile half cardHalf cardHalf card
Max Line Speed2,048 Mbits/s > 2,048 Mbits/s> 2,048 Mbits/s> 2,048 Mbits/s> 2,048 Mbits/s> 2,048 Mbits/s> 2,048 Mbits/s> 2,048 Mbits/s> 2,048 Mbits/s> 2,048 Mbits/s
Extra ESD ProtectionYesYesYesYesYesYesYesYesYesYes
Data Packets per Second> 2000 pps > 2000 pps> 2000 pps> 2000 pps> 2000 pps> 2000 pps> 2000 pps> 2000 pps> 2000 pps> 2000 pps
Approvals / Compliance DeclarationsEN55022 class B, CE, FCC class B, RoHS2, REACHEN55022 class B, CE, FCC class B, RoHS2, REACHEN55022 class B, CE, FCC class B, RoHS2, REACHEN55022 class B, CE, FCC class B, RoHS2, REACHEN55022 class B, CE, FCC class B, RoHS2, REACHEN55022 class B, CE, FCC class B, RoHS2, REACHEN55022 class B, CE, FCC class B, RoHS2, REACHEN55022 class B, CE, FCC class B, RoHS2, REACHEN55022 class B, CE, FCC class B, RoHS2, REACHEN55022 class B, CE, FCC class B, RoHS2, REACH
Operating Temperature range0 to 55°C ambient air temperature-40°C to 70°C ambient air temperature-40°C to 70°C ambient air temperature0 to 60°C ambient air temperature. Wider temperature version available on special order.0 to 60°C ambient air temperature. Wider temperature version available on special order.0 to 60°C ambient air temperature. Wider temperature version available on special order.0 to 60°C ambient air temperature.0 to 60°C ambient air temperature.0 to 60°C ambient air temperature.0 to 60°C ambient air temperature.
Internal/External Line ClockingBothBothBothBothBothBoth (very wide range of internal clocks), Terminal TimingBothBoth (very wide range of internal clocks), Terminal TimingBothBoth (very wide range of internal clocks), Terminal Timing
CablesOrder separately, see the Products Order InformationOrder separately, see the Products Order Informationnot suppliedOrder separately, see the Products Order InformationOrder separately, see the Products Order InformationOrder separately, see the Products Order InformationOrder separately, see the Products Order InformationOrder separately, see the Products Order InformationOrder separately, see the Products Order InformationOrder separately, see the Products Order Information
Software Features
X.25 softwareIncludedIncludedIncludedIncludedIncludedIncludedIncludedIncludedIncludedIncluded
IP over X.25 moduleYes YesYesYes YesYesYesYesYesYes
X.25 CCITT Compliance1980, 84 & 881980, 84 & 881980, 84 & 881980, 84 & 881980, 84 & 881980, 84 & 881980, 84 & 881980, 84 & 881980, 84 & 881980, 84 & 88
DTE/DCE OperationBoth & Auto SelectBoth & Auto SelectBoth & Auto SelectBoth & Auto SelectBoth & Auto SelectBoth & Auto SelectBoth & Auto SelectBoth & Auto SelectBoth & Auto SelectBoth & Auto Select
Max SVCs / PVCs

(all types)
254 per line,

4095 per line with high capacity pack
254 per line,

4095 per line with high capacity pack
254 per line,

4095 per line with high capacity pack
254 per line,

4095 per line with high capacity pack
254 per line,

4095 per line with high capacity pack
254 per line,

4095 per line with high capacity pack
254 per line,

4095 per line with high capacity pack
254 per line,

4095 per line with high capacity pack
254 per line,

4095 per line with high capacity pack
254 per line,

4095 per line with high capacity pack
Data Packet size range16 to 409616 to 409616 to 409616 to 409616 to 409616 to 409616 to 409616 to 409616 to 409616 to 4096
X.25 Developers ToolkitIncludedIncludedIncludedIncludedIncludedIncludedIncludedIncludedIncludedIncluded
On-Line API Reference

Manuals
IncludedIncludedIncludedIncludedIncludedIncludedIncludedIncludedIncludedIncluded
C,  Java and Visual Basic sample programsIncludedIncludedIncludedIncludedIncludedIncludedIncludedIncludedIncludedIncluded
X.25 High Capacity Pack Option - Supported YesYesYesYesYesYesYesYesYesYes
XOT option on LinuxYesYesYesYesYesYesYesYesYesYes
32 and 64 bit support on Windows and LinuxYesYesYesYesYesYesYesYesYesYes
Operating Systems supportedAll the adapters support Linux and Windows

FarSync adapters support Linux kernel versions 2.6.12 and 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.


The FarSync adapters install easily under Windows 11, 10, 8, 7, Windows Server 2019, 2016 and 2012 on single or multi-core 32 and 64 bit systems. The FarSync drivers are signed by Microsoft for easy installation.