Why would you manually reboot a phone, and what is the process for manual rebooting?

Manually rebooting phones process

Manual rebooting is typically performed as a troubleshooting step. For example, it helps refresh the phone and pull the latest configuration. To manually reboot a phone, unplug the power cable behind the phone, wait for 10 seconds, and then reconnect the power cable. The lights on the phone should appear upon reconnection. If not, it may be due to incorrect power cable placement, possibly in the wrong port behind the phone.