1. es156.exe Driver
2. CABLE10.TXT File Contents

CABLE10.TXT Driver File Contents (es156.exe)

   10 Mbps cabling specifications
                                                                    v1.00


Specifications and recommendations for Twisted-Pair Ethernet
============================================================

NOTE: For 100 Mbps operation, refer to the 100 Mbps Cabling
      Specification.

The EtherExpress(TM) PRO/100B adapters have a small, snap-in RJ45
connector.

RJ45 cabling is also known as Twisted-pair Ethernet (TPE), Unshielded
Twisted Pair (UTP), and 10BASE-T.

This document covers the following topics:

-  Recommended cables

-  Cable and connector pinouts

-  Connecting two workstations without a hub

-  Link integrity

-  Common problems

For more information on the 10BASE-T specification, contact your local
network supplier or call the IEEE at 800-678-IEEE.

Recommended cables
==================

The RJ45 connector can use 22, 24, or 26-gauge UTP cabling. The cable
must comply with the IEEE 802.3 10BASE-T standard for Category 3, 4,
or 5.

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

These UTP cables work well:


Manufacturer       Model number         No. of pairs
------------------------------------------------------
Belden             9562                 2
Data Set           2402                 4
Belden             9566                 6

Silver Satin is not within the 10BASE-T specification and may not work or
may work intermittently.

The EtherExpress PRO/100 adapters don't support pre-10BASE-T
concentrators.

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, the hub provides 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.

Pinout for the RJ45 connector
-----------------------------
   ----------              -------------------------
1 |--        |          8 |------------             |
2 |--        |          7 |------------             |
3 |--         ---       6 |------------             |
4 |--            |      5 |------------             |
5 |--            |      4 |------------             |
6 |--         ---       3 |------------             |
7 |--        |          2 |------------             |
8 |--        |          1 |------------             |
   ----------              -------------------------
END                           TOP

Pin name and function:

1  Transmit Data Plus. The positive signal for the TD differential pair.
   This signal contains the serial output data stream transmitted onto
   the network.

2  Transmit Data Minus. The negative signal for the TD differential pair.
   This contains the same output as pin 1.

3  Receive Data Plus. The positive signal for the RD differential pair.
   This signal contains the serial input data stream received from the
   network.

4  not used

5  not used

6  Receive data minus. The negative signal for the RD differential pair.
   This signal contains the same input as pin 3.

7  not used

8  not used

Connecting two workstations without a hub
=========================================

10BASE-T uses a star topology. This means there is a hub or concentrator
in the center of a star, and each workstation or server is connected to
this hub.

For test purposes, you can directly connect two workstations or a
workstation and a server without using a hub. This requires a special
cable that incorporates the crossover function described earlier in this
document.

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

NOTE: This is not an IEEE supported configuration and should be used for
      test purposes only.


Link integrity
==============

There are 3 LEDs on the EtherExpress PRO/100B adapter: A LNK light for
link, a ACT light for activity, and a 100 light which indicates a 100
Mbps connection.

Note: The ACT LED indicates that there is read/write activity on the
      network. It doesn't always mean there is 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
-----------------------------------------

Reset or power off/on your concentrator or hub.


Polarity problems
-----------------

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

EtherExpress PRO/100B adapters automatically detect this problem and
adjust for it internally.

Even though the current EtherExpress PRO/100B adapters can take care of
this crossover for you, it's best to check your wiring and correct this
problem if you find it.



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