The TT-8L/Y7 was an alternate model of the standard TT-8L gatekeeper droid designed for installation in a door or a door frame.
Captain Neg also had one TT-8L/Y7 droid guarding the door of his residence in Mos Espa in 32 BBY. While he was hunting Banthas in the Dune Sea, Jedi Master Qui-Gon Jinn tried to enter the house and rescue a local Ithorian boy named Tomo. The droid didn't let the Jedi enter the house, instead activating the security turrets near the gates, which forced Jinn to enter via a balcony.
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