John Klos wrote:
>That said, I have not seen any LC PDS ethernet cards that either have that
>jumper or need them. I have eight Quadra 605s with many types of ethernet
>cards, all of which I tested when changing the code that autosenses the
>amount of memory on ae ethernet cards, and all worked fine with an
>autoswitching hub.

I have 2 Asante MacCon boards of about the same vintageas the LC 
cards, and they definitely don't work with a 100BT autoswitching hub. 
I complained to Asante & got this answer (in part):

"From your description (or by our assumption) this connection is to 10/100
NWay switch/hub or it is a direct connection to a 10/100 port on a
G3/G4/iMac/iBook.  The symptom usually seen is that there is no connection
to the network, with a flashing link light on the card and no link status
obtained on the switch or hub.  These MCiLC (LC-PDS) and MacCon (ComSlot)
cards were compliant and worked with the then existing IEEE standards when
purchased by your organization. 
I believe that it can be shown that the card is functioning correctly
because if you connect the MCiLC-10T or MacCon cards (used in your LC/PDS
based systems) to a 10Mbps hub then they work just fine.  The reason for
this is that these cards, are not designed for NWay and  do not auto
negotiate (NWay) with 10/100 NWay devices such as described above."

...and went on to advise me to get a 10BT hub, which I did.

I certainly won't complain if the LC cards DO work with 100BT, as I 
have a couple that I have not had time to test!

Dan Killoran