FarSync T4E

Overview

The FarSync T4E card and software is part of a range of FarSite products designed to provide high performance hardware communications solutions for companies who wish to quickly develop their own VoIP and similar communications products without incurring the cost of having to develop and approve hardware. The Developers Toolkit is included with the product.

The T4E is a Universal PCI communications card (PCI and PCI-X compatible) with four independently configurable sync/async serial ports with and external synchronisation capability (eg GPS). Sync operation supports transparent bitstream and bitsync (HDLC) of up to 10 Mbits/s per line with a total card bandwidth of 60 Mbits/s.

One of the unique features of the T4E is the huge variety of clock source options, they can be:

Internally generated using a local clock generator

External from the WAN communications line

External via a special CTbus (H.100) clock bus connector

Sourced on one port then routed to the others

Multiplied or divided per port to obtain the required rate

Independently configurable for each line

The transparent bitstream option available with the APIs is suitable for VoIP (as a subsystem), video and voice such as T-DMB (Digital Multimedia Broadcasting), DAB (Digital Audio Broadcasting) ETI (Ensemble Transport Interface - ETSI 300799).

Windows: The product supports the standard Windows SDCI API, providing applications with direct access to the card's communications port/s for asynchronous, bit synchronous (HDLC) framing, and also transparent bitstream operation for video and voice type applications. The special clocking features are all accessible though the SDCI interface. Async support is also provided by the Win32 COMM interface as well as the SDCI IOCTLs.

Linux: Support is included for the Linux Raw Sockets API that allows HDLC frames and transparent bitstream data to be sent and received. It also allows selection of the full range of clock modes. Full documentation, source code for the Linux driver and a sample application demonstrating both modes of operation is provided.

Example Applications 

The FarSync T4E is particularly suitable for VoIP applications where clock synchronisation or widely variable clock speeds are required. Examples of such applications include:

Reproduction of legacy Audio streams across the TCP/IP networks (VoIP) using Satellite (GPS) clock source synchronisation

Interfacing DAB ETI (Ensemble Transport Interface - ETSI 300799) transparent bit streams to Servers

Interfacing high speed MPEG Video bit streams T-DMB ETI to Servers

High speed multi-port HDLC framing support for non standard or specialist protocols

Network clock synchronisation

Further Product Details

Information in this document is subject to change without notice.
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