1. j3171a.exe Driver
2. CABLE100.TXT File Contents

CABLE100.TXT Driver File Contents (j3171a.exe)

   100 Mbit/s cabling specifications
                                                                  v1.06


100 Mbit/s cabling specifications for 100 Mbit/s PCI adapters
==============================================================

The HP 10/100TX PCI 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 cabling.

The type of cabling you must use depends on the adapter you're using.

This document covers the following topics:

 - Recommended cables
 - Link integrity
 - Common problems
      
      NOTE: For 10 Mbit/s operation, refer to the 10 Mbit/s cabling
            specifications readme file.
      
      

Recommended cables
------------------

The cable must comply with the IEEE 802.3 10BASE-T standard for 2-pair,
Category 5, UTP cable. Select a high-quality brand of Category 5 cable
from your local supplier.

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

HP 10/100TX PCI adapters do not 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 (TD+). The positive signal for the TD differential
   pair. This signal contains the serial output data stream transmitted
   onto the network.

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

3  Receive Data Plus (RD+). 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 (RD-). 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
-----------------------------------------

100BASE-T uses a star topology. This means a hub or concentrator is 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 setup requires a
special cable incorporating the crossover function described earlier in
this document. The table below shows which wires need to be crossed over.


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 three LEDs on the adapter:

1. A LNK light for link

2. An ACT light for activity

3. A 100 light which indicates a 100 Mbit/s connection

Refer to your adapter Installation Guide or the "Diagnostic LEDs" Readme
file for complete information.
      
      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. Also, make sure
last line in the NET.CFG file reads:
   
   lastdrive=F (for NETX systems)
   
     or
   
   lastdrive=Z (for VLM systems)

Also try resetting the concentrator or hub or turn the power off and on.


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

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

HP 10/100TX PCI adapters automatically detect this problem and
adjust for it internally. However, it's best to check your wiring and
correct this problem if you find it.



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