Final answer:
Joe needs to adjust the SSID setting on the router to enable the devices to see the wireless signal.
Step-by-step explanation:
Joe needs to adjust the SSID setting on the router to enable the devices to see the wireless signal.
The SSID, or Service Set Identifier, is the name of the wireless network. It is what allows devices to identify and connect to a specific network. If Joe's devices cannot see the wireless signal, it is likely because the SSID is not being broadcasted.
Joe should access the router's settings, locate the SSID option, and ensure that it is enabled or set to broadcast. By enabling the SSID, the wireless signal will be visible to Joe's devices, allowing them to connect wirelessly.