FarSync sync and async USB, PCIe, PCI, PCI-X and PCMCIA communications adapters

FarSync WAN Comms Adapters
Product montage

FarSite supply the world biggest range of USB, PCI Express, Universal PCI and PCMCIA bus communications adapters.

The range includes: E1, T1, X.21, V.35, RS232, EIA530, RS422, RS449 and RS485 WAN interfaces for synchronous and asynchronous operation.

FarSync Flex
  • The FarSync Flex is a 1 port synchronous / asynchronous USB adapter designed to provide a high performance communications solution.
  • The highly flexible universal network connector supports RS232, X.21, RS530, RS422, RS449 , RS485 and V.35 network interfaces.
  • Supports Windows FsWinAPI and Linux Char I/O API.
FarSync T2U–PMC
  • The FarSync T2U-PMC cards provide high performance 2 port solutions for PMC (PCI Mezzanine) slots.
  • The highly flexible universal network connectors support 2 RS232, X.21, RS530, RS422, RS449 or V.35 network interfaces.
  • Front I/O or Rear I/O versions available.
  • Supports Windows FsWinAPI and Linux Char I/O API.
FarSync TE1e
  • The FarSync TE1e is a 1 port E1 / T1 PCI Express adapter designed to provide a high performance communications solution.
  • Full bandwidth on unstructured T1 and E1 G.703 lines, T1 and E1 fractional (G.703/G.704), HDLC framed and transparent operation are all supported.
  • RJ48C (RJ45) and BNC network connectors.
  • External clocking option.
  • Supports Windows FsWinAPI and Linux Char I/O API.
FarSync T2Ue
  • The FarSync T2Ue is a 2 port sync PCI Express adapter for high performance communications solution.
  • Sync lines at speeds of up to 10Mbits/s.
  • RS232, X.21, RS530, RS422, RS449 and V.35 network interfaces.
  • Wide range of clock speeds.
  • Supports Windows FsWinAPI and Linux Char I/O API.
FarSync T2Ee
  • The FarSync T2Ee is a 2 port sync PCI Express low profile adapter for a compact high performance communications solution.
  • Handles lines at speeds of up to 10Mbits/s and supports RS232, X.21, RS530, RS422, RS449, RS485 and V.35 network interfaces.
  • NRZ, FM0, FM1, Manchester Encoding and Conditioned Diphase modes.
  • Supports Windows FsWinAPI and Linux Char I/O API.
FarSync T4Ue
  • The FarSync T4U is a 4 port sync or async PCI Express adapter designed to provide a high performance communications solution.
  • Supports sync line speeds of up to 10Mbits/s and async up to 115.2 Kbits/s (with async option)..
  • Supports RS232, X.21, RS530, RS422, RS449 and V.35 network interfaces.
  • Supports Windows FsWinAPI and Linux Char I/O API.
FarSync T4Ee
  • The FarSync T4Ee is an intelligent sync/async 4 port adapter with multiple clock sourcing options.
  • The adapter is designed to meet requirements for communications adapters needing highly adaptable control of line clocks or a wide variety of line signalling modes.
  • Supports RS232, X.21, RS530, RS422, RS485, RS449 and V.35 network interfaces.
  • NRZ, NRZI, FM0, FM1, Manchester Encoding and Conditioned Diphase line signalling.
FarSync M1P
  • The FarSync M1Pv2 - is a 1 port sync PCMCIA WAN adapter designed to provide a high performance communications solution.
  • The FSWinAPI permits HDLC framed operation from Windows or the adapter can connect to the standard TCP/IP protocol stack to allow access to IP based networks such as the Internet.
  • Supports X.21, V.35, RS530, RS422 and RS232 synchronous connectivity requirements in a PCMCIA Card format.
FarSync T1U
  • The FarSync T1U is a 1 port sync Universal PCI adapter designed to provide a high performance communications solution.
  • Supports Windows FsWinAPI and Linux Char I/O API.
  • Synchronous line at speeds of up to 10Mbits/s.
  • RS232, X.21, RS530, RS422, RS449 and V.35 network interfaces.
FarSync T2U
  • The FarSync T2U is a 2 port sync Universal PCI adapter designed to provide a high performance communications solution
  • Supports Windows FsWinAPI and Linux Char I/O API.
  • Synchronous lines at speeds of up to 10Mbits/s.
  • RS232, X.21, RS530, RS422, RS449 and V.35 network interfaces.
FarSync T4U
  • The FarSync T4U is a 4 port synchronous Universal PCI adapter with an asynchronous upgrade available.
  • Supports Windows FsWinAPI and Linux Char I/O API.
  • Supports sync line speeds of up to 10Mbits/s and async up to 115.2 Kbits/s (with async option).
  • RS232, X.21, RS530, RS422, RS449 and V.35 network interfaces.
FarSync T4E+ sync/async card with clock routing selection
  • The FarSync T4E+ is an intelligent sync/async 4 port adapter with multiple clock sourcing options.
  • The adapter is designed to meet requirements for communications adapters with externally sourced line clocks or highly adaptable control of line clocks all controlled by an API.
  • Supports RS232, X.21, RS530, RS422, RS449 and V.35 network interfaces.
  • NRZ, FM0, FM1, Manchester Encoding and Conditioned Diphase.
FarSync TE1
  • The FarSync TE1 is a 1 port E1 / T1 Universal PCI adapter designed to provide a high performance communications solution.
  • Full bandwidth on unstructured T1 and E1 G.703 lines, T1 and E1 fractional (G.703/G.704), HDLC framed and transparent operation are all supported.
  • RJ48C (RJ45) and BNC network connectors.
  • Supports Windows FsWinAPI and Linux Char I/O API.
FarSync TE1R
  • The FarSync TE1R is a 1 port E1 / T1 Universal PCI adapter designed to provide a high performance communications solution.
  • Full bandwidth on unstructured T1 and E1 G.703 lines, T1 and E1 fractional (G.703/G.704), HDLC framed and transparent operation are all supported.
  • Supports Windows FsWinAPI and Linux Char I/O API.



FarSync Universal PCI and PCI Express adapters comparative specification overview
For more detailed information about the particular adapter, click on the product name
Note: The FarSync TE1, FarSync TE1R and FarSync TE1e are not listed in this table as they support a different type of network interface.
Product Name FarSync T1U FarSync T2U FarSync T2Ue FarSync T2Ee FarSync T4U FarSync T4Ue FarSync T4E+
Product Code FS4140 FS4240 FS4250 FS4256 FS4440 (sync)
FS4441 (sync and async)
FS4450 (sync)
FS4451 (sync and async)
FS4446 (T4E+)
Warranty 5 years 5 years 5 years 5 years 5 years 5 years 5 years
Hardware Features
Adapter Bus Type PCI / PCI-X 32 and 64 bit bus
PCI 2.2 compliant
Bus Mastering
PCI / PCI-X 32 and 64 bit bus
PCI 2.2 compliant
Bus Mastering
PCIe bus compliant with PCI Express Base Specification Revision 1.0a 1x (single lane) PCIe bus compliant with PCI Express Base Specification Revision 1.0a 1x (single lane) PCI / PCI-X 32 and 64 bit bus
PCI 2.2 compliant
Bus Mastering
PCIe bus compliant with PCI Express Base Specification Revision 1.0a 1x (single lane) PCI / PCI-X 32 and 64 bit bus
PCI 2.2 compliant
Bus Mastering
Max Port Count 1 port 2 ports 2 ports 2 ports 4 ports 4 ports 4 ports
Multiple adapters in a PC 1 12 or more 12 or more 12 or more 12 or more 12 or more 12 or more
Network Interfaces RS232, X.21, V.35, EIA530, RS422, RS449 RS232, X.21, V.35, EIA530, RS422, RS449 RS232, X.21, V.35, EIA530, RS422, RS449 RS232, X.21, V.35 EIA530, RS422, RS449, RS485 RS232, X.21, V.35, EIA530, RS422, RS449 RS232, X.21, V.35, EIA530, RS422, RS449 RS232, X.21, V.35, EIA530, RS422, RS449
Adapter network connector HD26F HD26F HD26F HD44F HD62F HD62F HPPI100F
Async support no no no no optional on 4 ports optional on 4 ports yes on 4 ports
Line Signaling NRZ NRZ NRZ NRZ, FM0, FM1, Manchester Encoding, Conditioned Diphase NRZ NRZ NRZ, FM0, FM1, Manchester Encoding, Conditioned Diphase
Adapter Size Half card Half card Half card half card, low profile Half card Half card Half card
Max Line Speed 10 Mbits/s 10 Mbits/s 10 Mbits/s 10 Mbits/s 10 Mbits/s 10 Mbits/s 10 Mbits/s
Max Total Bandwidth 20 Mbits/s 40 Mbits/s 40 Mbits/s 40 Mbits/s 64 Mbits/s 64 Mbits/s 64 Mbits/s
ESD Protection Yes Yes Yes Yes Yes Yes Yes
Approvals EN55022 class B, CE, FCC class B EN55022 class B, CE, FCC class B EN55022 class B, CE, FCC class B EN55022 class B, CE, FCC class B EN55022 class B, CE, FCC class B EN55022 class B, CE, FCC class B EN55022 class B, CE, FCC class B
Line clocking
(internal/external)
Both, adapter generated clock
range: 9600, 19200, 38400 and 76800 baud. 2
Both, all ports selectable.
adapter generated clock range
9,600 baud to 8Mbits/s. 2
Both, all ports selectable.
adapter generated clock range
100 baud to 10 Mbits/s. 2
Both, all ports selectable.
adapter generated clock range 100 baud to 10 Mbits/s. 3
Both, all ports selectable.
adapter generated clock range 9,600 baud to 8Mbits/s. 2
Both, all ports selectable.
adapter generated clock range 9,600 baud to 8Mbits/s. 2
Both, all ports selectable.
adapter generated clock range 100 baud to 10 Mbits/s. 4

2 No special cables are required to use internal clocks for RS232, RS530 and X.21. For V.35 internal clocking the UX35C DCE cable should be used.

3 Uses extended cable set, see FarSync T2Ee cables

4 Uses extended cable set, see FarSync T4E+ cables

Extended range clock generation No No Yes Yes No No Yes
Clock routing No No No No No No External source, clock speed multiplication & division with clock routing, see card features
Power requirements 850mA @ +3.3 V
< 5 mA @ +/-12 V
(ESD suppression)
2.8 watts max
< 1.2 Amp @ +3.3V
< 5 mA @ +/-12V
(ESD suppression)
< 4 watts max
< 1.2 Amp @ +3.3V
< 5 mA @ +/-12V
(ESD suppression)
< 4 watts max
< 1.2 Amp @ +3.3v,
< 4 watts max.
< 1.75 Amp @ +3.3V
< 10 mA @ +/-12V
(ESD suppression)
< 6 watts max
< 1.75 A @ +3.3V
< 10mA @ +/- 12V (ESD suppression)
< 6 watts max
< 1.75 Amp @ +3.3V
< 10 mA @ +/-12V
(ESD suppression)
< 6 watts max
Loopback test connector 1 port, supplied with adapter 1 port, supplied with adapter 1 port, supplied with adapter 2 port supplied with adapter 4 port, supplied with adapter 4 port, supplied with adapter 4 port, supplied with adapter
Cables Order separately, see the FarSync T-Series product range and compatible cables table Order separately, FarSync T2Ee cables Order separately, see the FarSync T-Series product range and compatible cables table Order separately, FarSync T4E+ cables