Stargate authorization device code
From The Stargate Omnipedia
Data input required by a Stargate authorization device in order to permit an inbound traveler. After dialing a Stargate with the technology in place, the authorization code must be entered within a preset period of time. If the correct code is not transmitted to the receiving gate, the authorization device stores incoming matter in the Stargate's buffer and automatically "call-forwards" it to a different gate.
The authorization device Stargate Command encountered on P3X-584 was configured by Anubis.
KEY EPISODE
Prototype - Carter finds a way to break the code in Anubis's device using the S.G.C. dialing computer, allowing SG-1 to travel to P3X-584.