Is this what they mean by wireless networking?
To their credit, Netgear Tech Support promptly offered to ship me a replacement unit. This switch is 22 months old but is apparently still under warranty.
(The problem, if you’re unfamiliar with networking hardware, is not that there are six link lights lit even though no cables are plugged in. The problem is that one of those six phantom connections is reading at only 10 Mb/sec! Appalling, just appalling.)