Listening post

A listening post is a covert operations center for monitoring communications and territory (as of an enemy) between space-faring civilizations.

In 2151, Captain Archer uncovered a Vulcan listening post hidden at the temple of P'Jem affirming Andorian suspicions. 

In 2293, the Enterprise-A fooled its way past a Klingon listening post on Morska to rescue Captain Kirk and Doctor McCoy from Rura Penthe. 

In 2373, a Federation listening post in the Gamma Quadrant intercepted a Cardassian message, discovered to be an encoded message from Enabran Tain, though Elim Garak initially claimed it was a five-year old planetary survey report. During the Dominion invasion that followed, Kira Nerys noted that the last Federation listening post just went dead shortly before the fleet entered the Bajoran wormhole. 

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