1. the cord connecting the phone to the receiver is missing.
2. your dialing mechanism is also missing.
The means that you are incapable of making any phone calls at the moment. It also means that you are incapable of controlling your FENESTRATED PANEL, due to the fact that it works with you plugging in numbers on the phone, and it translating into data about time and place. That must be why the two share a plug. They interact with each other.
Speculation: does that mean that you could dial up somebody in the future? Because the panel works future-wise, maybe. But your guess is as good as mine, for now at least.