There is a card called the EtherPort SE/30 plus two NuBus versions called EtherPort II. I have drivers for both of these so send me a message if you still need them.
If the card is in an SE/30, then it has to be the SE/30 version. SE PDS cards are not compatible (physically) with the SE/30. Plug a 10 Base-T AUI transceiver into the back of the card and you can use it on a modern network.
If the card is in an SE/30, then it has to be the SE/30 version. SE PDS cards are not compatible (physically) with the SE/30. Plug a 10 Base-T AUI transceiver into the back of the card and you can use it on a modern network.