I've been using my desktop's DSL connection from my laptop using an Airlink\nwireless router for months. Lately the service has been erratic: the\nwireless signal is excellent, but there are periods, sometimes for days,\nwhen the laptop is sending many packets more than it receives and my\ninternet access from the laptop is effectively nil. What might be causing\nthis? How can I diagnose? TIA!