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Summary. The Tau'ri-named Dial Home Device, or DHD, was built by the Ancients as a companion component to the Stargate. The DHD is the control mechanism for the Stargate; it enables a traveler to dial a destination Stargate address and request activation of the wormhole.he DHD works within the Stargate network to correct the glyphs' coordinates for stellar and planetary shifts that over time would make the original constellations incorrect (1.01 Children of the Gods Part 1). The Stargate network is just that: a network.