A villa with a gate a long way from the front door, and a household that kept missing deliveries because nobody heard the bell from the back of the house.
Video door stations went on both the gate and the front door, with indoor monitors in the kitchen and main bedroom. Calls forward to phones after a few seconds, so the gate can be opened for a delivery from anywhere.
Both stations have night vision and a wide enough lens to show whether someone is alone at the gate, which mattered more to the client than picture resolution.