Temporal communications chamber

A temporal communications chamber was a room aboard a Suliban helix that allowed audio and minimal visual communications between Cabal soldiers and a mysterious figure from the 28th century. The room produced a strange "pre-echo" effect, in which it appeared that one could see things happen seconds before they actually did. 

Through much of the mid-22nd century, Silik used a temporal communications chamber to contact his time-traveling master.

When Silik was temporarily unable to contact his master, Captain Jonathan Archer used the chamber to make his way back to his time from the 31st century, using an advanced technology provided by Crewman Daniels that was able to temporarily transform the chamber into a means by which one could actually travel through time