There are a lot of questions that still need to be answered. This printer will not support ethernet directly since it only comes with a LocalTalk port.
You can put this printer on the network with an Ethernet to LocalTalk bridge. Asante makes these and they are called either AsantePrint or AsanteTalk.
Asante also makes phone net adapters with a serial cable at one end and two phone jack plugs at the other end. These are designed for LocalTalk networking using standard phone cable. They can't be attached to an ethernet network unless you also have an AsantePrint or AsanteTalk adapter. These adapters are larger than the phone net adapters and require a power supply. They also have an ethernet port that is larger than the phone jack port.
If you got an AsanteTalk or AsantePrint adapter then consider yourself lucky since they are likely worth more than the printer. My guess is that you just have a basic phone net adapter that won't allow you to hook up to the router.
I also don't think this printer is supported in OSX (It only has Postscript ver 1, but I think you need to have at least ver. 2). It should work just dandy in OS9 or earlier, however, via LocalTalk.
You can also get it working on the PC if you have Appletalk support or some PC to Mac networking software such as PCMacLan (not free).
Real Macsters don't repair permissions.
Opinions are like toothbrushes. Everybody has one, so there's no need to share. - Red Green