> How do I isolate the problem? That is, how do I determine > if it's the Linksys NIC, the Linksys NIC/cablemodem > connection, a weak upstream cablemodem signal, a weak > downstream signal... Try replacing the simplest items (and cheapest) first: cables Then I'd look at the Linksys NIC. They cost what, around $20 ?? Some would say you get what you pay for. ;-) Hall