Time corridor
A time corridor, also called a spacetime-induction channel, was a form of time travel in which a wormhole was created through the Time Vortex. It was generally considered less advanced than other time travel technologies such as TARDISes.
Time corridors were primarily used by the Daleks. Despite being described as less advanced than other time technology, time corridors seemed to be easily capable of dragging a TARDIS off course to a specific location. (DW: The Evil of the Daleks, Resurrection of the Daleks, Remembrance of the Daleks)
Time corridor technology was first used by the Daleks near the beginning of the Great Civil War. (DW: The Evil of the Daleks)
In order to complete a corridor, the Daleks built time conduits that would serve as the ends of the corridor. If the conduit on a planet was destroyed, the Daleks would no longer be able to reach it via the time corridor. (BFA: The Mutant Phase)
The Daleks used a time corridor as a link between themselves and Earth in 1984. There they had deposited samples of the Movellan virus that they would later need. Turlough accidentally travelled through the corridor and so the Doctor followed him in his TARDIS. Both the Daleks and Lytton's men used the corridor numerous times. (DW: Resurrection of the Daleks)
The New Dalek Paradigm escaped through a time corridor after their plan to destroy Earth failed. (DW: Victory of the Daleks)
In emergencies craft travelling within a time corridor could deploy an escape time corridor which could latch onto familiar technology. (BFA: The Time of the Daleks)
The fractured Eternity Clock created time corridors in four different eras of London, releasing the Silence in the Elizabethan Era, Silurians in the Victorian Era, Cybermen in modern day London and the New Dalek Paradigm in 22nd century London. The Eleventh Doctor and River Song traveled between these different times and collected the pieces of the Clock, which closed the time corridors and erased the alternate timelines created by the invading species. (VG: Doctor Who: The Eternity Clock)
Behind the Scenes
After the end of the civil war and the defeat of the Humanised Daleks, the Emperor Dalek decided that the Daleks, in order to succeed in their conquests, would have to change history, thus time travel was put into greater use by the race. (REF: Doctor Who: The Dalek Handbook)
