AppleIIguy wrote:
> Hi, y'all!
>
>     I have a sick SE/30 with some kind of card in it.  Visible in the
> slot in the back of the SE/30 is: an ethernet connector, a 15 pin
> female connector (in 2 rows) and a three position slide switch with
> the letters TPL, TPN and TK stamped in the metal next to the switch.
> Can anyone tell me what this card is?
>
> Willi

The 15 pin D connector will be a standard AUI socket for an ethernet 
transceiver. The transceiver can give you support for a thinwire (coaxial) or 
thickwire network. The other connector is a standard RJ45 twisted pair ethernet 
socket.

TK = Thickwire -- setting for external transceiver
TPL = Twisted Pair with Linkbeat -- setting for RJ45 connected to a network 
that 
requires the ethernet card to generate a linkbeat
TPN = Twisted Pair with No linkbeat -- normal RJ45 setting

For modern hubs, the appropriate setting would be TPN though TPL would usually 
be harmless. TPL originates in the early days of twisted pair ethernet 
networking and you won't see references to it with contemporary equipment.


Scott



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