Following the Battle of Azati Prime in early 2154, the door chime at Captain Jonathan Archer's ready room was non-operational, so visitors had to knock on the door to announce their presence. (ENT: "Damage") In the script of ENT: "Home", a door chime was referred to as being available outside T'Les' residence. However, that component is missing in the final version of the episode, resulting in visitors instead having to knock on the building's door.