Subspace relay station
Subspace relay station, subspace relay booster station, or communications relay was a specific type of communication relay station incorporating a subspace relay. Typically, they were part of a Subspace relay network.

In the Federation, the performance of these stations was tested according to criteria established in STFL spec 0473/111243. If a station was not up to spec, it was repaired on site. A 4.2 gigawatt power generator was enough to sustain such a station. (, okudagram; )

In 2364, prior to stardate 41775, the Federation starships  and  tested the stations on the Rigel/Andor link. (, okudagram)

In the Treaty of Armens (2255), one of the provisions read, "Third party assistance may be requested from a Federation Starfleet vessel or a Sheliak Corporate spacecraft if the distance from the vessel to the respective homeworld is greater than five thousand (5.0) light years. UFP Standards Measurement Bureau Units. Assistance may also be requested if the vessel is less than 1,000 light years from a standard UFP subspace relay booster station." (, okudagram)

The Cardassian world Loval contained a a small subspace relay station associated with its civilian outpost. ()

In 2371, a joint effort between the Federation and Cardassian scientists led to the creation of a relay station being built on the Gamma Quadrant side of the Bajoran wormhole to aid communications. ()

In 2374 Voyager encountered two Hirogen relay stations which they used to communicate with Starfleet Command from the Delta Quadrant. ()

Known relay stations 
AR-558
Relay Station 001
Relay Station 47 (or Relay Station 047)
Relay Station 67
Relay Station 102-A
Relay Station 194
Relay Station 452
Relay Station 8110
Relay Station 902N
Wormhole relay station
Epsilon IX station

See also 
 Communication array

de:Relaisstation
Subspace
Communications technology
Station types