A communications tower was a tower of the Terra Nova colony housing the communications technology.
In 2151, Ensign Travis Mayweather from the landing party of Enterprise NX-01 told Captain Jonathan Archer that they accessed the schematics of the communications tower. Archer told him to see if the data buffer was still intact.
A photograph of the communications tower including its satellite dish was part of the data from the historical archive. (ENT: "Terra Nova")