Furling transportation arch
From The Stargate Omnipedia
Advanced device of Furling origin, housed in a massive castle-like structure on the Utopian planet. When a key interfaces with the doorway, the correct combination can initiate a gateway. Travelers must enter simultaneously, or be in physical contact, otherwise one may be missed. A glowing energy field encompasses the travelers, which snaps them away.
All travelers are taken to a secluded sanctuary on the Utopian moon.
KEY EPISODE
Paradise Lost - SG-1 locates one of the few pieces of Furling technology that has ever been discovered -- a Furling device, which turns out to be a transporter.