DOCUMENT:Q103733  10-JAN-2000  [win95x]
TITLE   :Error Messages or Hangs Using 3Com EtherLink III (3C509)
PRODUCT :Microsoft Windows 95.x Retail Product
PROD/VER:WINDOWS:3.1,3.11
OPER/SYS:
KEYWORDS:

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The information in this article applies to:

 - Microsoft Windows versions 3.1, 3.11 
 - Microsoft Windows for Workgroups versions 3.1, 3.11 
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SYMPTOMS
========

You may receive error messages or your computer may stop responding (hang) when
you use a 3Com EtherLink III (3C509 or 3C509TP) network adapter card if your
card is configured for a maximum modem speed setting that is too high. If a
problem occurs when you start (boot) your computer, an error message such as the
following may occur:

   Error #5740 the Protocol Manager Reported a Protocol Failure at
   Initialization

RESOLUTION
==========

To correct these problems, run the Menu program on the 3C509 Utility disk
supplied with your EtherLink card. The following instructions describe how to
use the Menu program to change the maximum modem speed for your EtherLink card:

1. Start the Menu program.

2. From the main menu, choose Diagnostic and Configuration Program.

3. On the next menu, choose the Install option.

4. Choose Configure Adapter to open the Adapter Configuration menu.

5. From the Adapter Configuration menu, select the Maximum Modem Speed option.

6. The default speed, 9600, is usually appropriate. If your machine is slower,
   select a lower value.

MORE INFORMATION
================

The following quote, from page 2-4 of the "EtherLink III Adapter Guide,"
describes the function of the Maximum Modem Speed option:

   Selecting a modem speed tells the adapter how long it can disable interrupts
   without causing problems with the serial port. The lower the modem speed, the
   longer the adapter can keep interrupts disabled. On slower computers, running
   with longer disabled interrupts can improve network performance. On those
   computers, changing the option setting to 2400, 1200 or No Modem may improve
   performance. On faster computers, there is little performance difference
   between the settings.

If you experience problems with your modem, such as dropped characters or
excessive retries, selecting a higher option setting should help. If the problem
is not due to the EtherLink III driver, changing the option setting does not
make a difference.

If you experience compatibility problems between your adapter and another device
in the system other than a modem, selecting a higher option may help.

NOTE: The default value (9600 bits per second [BPS]) works whether you have a
modem or not, or even if the modem is slower than the default (example, 2400
BPS). Do not change the default option setting unless you experience problems.

Additional query words: 3.10 hang hung crash crashed locks locked frozen freezes crashing quit quits stopped

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Keywords          :  
Technology        : kbAudDeveloper kbWin3xSearch kbWFWSearch kbZNotKeyword3 kbWin310 kbWin311 kbWFW310 kbWFW311
Version           : WINDOWS:3.1,3.11

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