CABLE100.TXT Driver File Contents (

100 Mbps cable specifications
This is an ASCII file called CABLE100.TXT in the ATI 
CardAssistant INFO directory. Use a text editor or a 
word processor with a mono-space font such as Courier 
to print this file if needed for reference.
**                                                        **
** Specifications and recommendations for 100 Mbps cabling**
**                                                        **

NOTE: For 10 Mbps operation, refer to the "10 Mbps cabling
      specifications" information file.

This document covers the following topics:

Twisted-Pair Ethernet (TPE) cabling

The ATI AT-2500TX PCI adapter has an RJ-45 connector for 
use with TPE cabling. TPE cabling is also known as 
RJ-45 cabling, Unshielded Twisted Pair (UTP), and 10BaseT 

For more information on the 10BaseT specification, contact 
your local network supplier or call the IEEE at 

Recommended cables

For 100 Mbps operation, the cable must comply with the IEEE 
802.3 10BaseT standard for 2-pair, Category 5, UTP cable.

The cable between the computer and the hub must be less 
than 100 meters long.

This UTP cable works well:

Manufacturer     Model number       No. of pairs
Belden           1588A              2

Cable and connector pinouts

If you need to repair a cable or provide connectors for 
UTP cable, wire straight through as shown in the 
following table.

Function    Pin#               Pin#
TX+         1    <-------->    1
TX-         2    <-------->    2
RX+         3    <-------->    3
RX-         6    <-------->    6

Use only four of the eight pins. Pins 1 and 2 must be a 
pair, and pins 3 and 6 must be a pair.

To allow for a straight-through cable, hubs and switches 
provide an internal transmit/receive crossover function. 
This means the transmit circuit of the network card is 
connected to the receive circuit of the hub and vice-versa.

Link integrity

There are three LEDs on the ATI AT-2500TX PCI adapter:

100 light for 100 Mbps operation

ACT light for activity

LNK light for link

Refer to the "Diagnostic LEDs" information file for 
brief descriptions.

Note: The ACT LED indicates read/write activity on the 
network, not necessarily activity on the adapter.

Common problems

A hub can't detect a workstation

This is often the result of a crossed wire in the cable or 
wiring closet. Make sure the wiring is correct.

Workstations can't connect to the network

Make sure hub port is configured to the correct speed. 

Reset or power off/on your hub or switch.

Polarity problems

A common problem in 10BaseT wiring is crossing the positive 
and negative phases of the transmit and receive signals 
(for example, crossing pins 1 (TX+) and 2 (TX-)).

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Download Driver Pack

How To Update Drivers Manually

After your driver has been downloaded, follow these simple steps to install it.

  • Expand the archive file (if the download file is in zip or rar format).

  • If the expanded file has an .exe extension, double click it and follow the installation instructions.

  • Otherwise, open Device Manager by right-clicking the Start menu and selecting Device Manager.

  • Find the device and model you want to update in the device list.

  • Double-click on it to open the Properties dialog box.

  • From the Properties dialog box, select the Driver tab.

  • Click the Update Driver button, then follow the instructions.

Very important: You must reboot your system to ensure that any driver updates have taken effect.

For more help, visit our Driver Support section for step-by-step videos on how to install drivers for every file type.

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