This is a Sojian-produced technology that allows them to rapidly move from point to point within the Lerodan Star System.
Faster Than Light
A jumpdrive allows for very small 'hops', which can transport a vessel from planet to planet in days rather than months.
Jumpdrives are very power-inefficient. They consume vast stores of energy in a short period of time, meaning they are entirely unreliable for long jumps. They are very stable and can be mounted on small vessels, but their power requirements mean that if they were scaled up for use in much larger ships, the exponential leaps in energy requirements would be far too much for even the most beefy reactors to sustain.
This technology is not yet fully canon, and needs discussion.