allenpan

Model: 3COM SuperStack2 NetBuilder 467 3C8467

i just bought a router from ebay, i am unable to find any document or manual nor software, i search on 3com web and found nothing

i am new to this, i connect the cable from my computer to lan, if i use streght it says cable unplug, if i use cross over is ok, but no ip, also on WAN port it says "Line Error" when nothing is plug in, is it right?

i wanna use cable model and use this router to share it, can anyone help!!! plz

thx