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Q147826: 3c595 Adapter Auto-Detects Wrong Media Speed

Article: Q147826
Product(s): Microsoft Windows NT
Version(s): 3.5 3.51
Operating System(s): 
Keyword(s): kb3rdparty kbnetwork
Last Modified: 09-AUG-2001

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The information in this article applies to:

- Microsoft Windows NT Workstation versions 3.5, 3.51 
- Microsoft Windows NT Server versions 3.5, 3.51 
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SYMPTOMS
========

When a Windows NT system with a 3Com 3c595 Fast Ethernet adapter starts its
network services, other Windows NT systems with 3c59x cards and located on the
local network segment lock up.

CAUSE
=====

The 3c595 Ethernet adapter, which is compatible with both 10 MB/s and 100 MB/s
Ethernet segments, is improperly detecting the 10 MB/s Ethernet segment as a 100
MB/S Ethernet segment.


RESOLUTION
==========

Use the 3Com adapter configuration utility for the 3c595 NIC to force the media
type setting to 10 MB/s. To do this, use the following procedure:

1. Boot the Windows NT system with an DOS-bootable disk (the configuration disk
  is NOT bootable by default).

2. From the root of the floppy disk, type 3C59XCFG.EXE and press ENTER.

3. From the menu, select "Install" and "Configure Adapter".

4. From the "Adapter Configuration" window, select "Media Type".

5. From the "Media Type" window, select "10 base-T (RJ-45) (10 Mbits)".

6. Click "OK." The specified settings will now be saved to the adapter.

7. Remove the floppy disk from the drive and reboot the system.

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Keywords          : kb3rdparty kbnetwork 
Technology        : kbWinNTsearch kbWinNTWsearch kbWinNT351search kbWinNT350search kbWinNTW350 kbWinNTW350search kbWinNTW351search kbWinNTW351 kbWinNTSsearch kbWinNTS351 kbWinNTS350 kbWinNTS351search kbWinNTS350search
Version           : 3.5 3.51
Issue type        : kbprb

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