Auto-dialer

The Asgard Auto-Dialer is a small, stone-shaped device that can be used to establish a stable wormhole to a predetermined address stored within the device without the need for the lengthy dialing sequence or a DHD to even a distant galaxy without a ZPM connected to the gate.

The device also appears to create a wormhole without the unstable vortex that engaging a wormhole usually creates. First used by Thor, it was later used by Cassandra 80 years in the future, humans having been gifted such Asgard knowledge and tools by this point.