wireless?

Just finished my second call of the day of the following premise:

Customer calls in, upset that we sent him the wrong DSL gateway. I inquire why he believes so. He says he ordered the wireless one, and this one isn't wireless. I check, he was shipped the wireless model. Why does the customer believe that this model isn't wireless?

Because it has a power cable, and that's a wire.

/cries self to sleep...