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Memory Alpha

Subspace transceivers were components of any type of subspace radio. Several starships were equipped with a subspace transceiver array.

Subspace transceivers formed an integral part of the Borg Collective, as they were responsible for linking the trillions of drones into the collective consciousness. (TNG: "I Borg")

Enterprise NX-01 was equipped with a subspace transceiver array. In 2151, Ensign Hoshi Sato had to run a diagnostic of the array. (ENT: "Silent Enemy")

In 2154, subspace transceivers were used by the Romulan Star Empire on the exterior of the Romulan drone ship. (ENT: "Babel One")

In 2370, Jake Sisko built a subspace transceiver as a science project. (DS9: "Whispers")

Damar modified the subspace transceiver array aboard the Groumall to create the illusion to sensors of having refined dilithium crystals aboard. (DS9: "Return to Grace")

In 2372, the Cardassians removed Empok Nor's subspace transceiver when they abandoned the space station. (DS9: "Empok Nor")

In 2374, Grand Nagus Zek brought three Ferengi subspace transceivers to Deep Space 9 aboard his shuttle. (DS9: "Profit and Lace")

In 2375, the subspace transceiver of the Silver Blood USS Voyager malfunctioned shortly before the vessel's destruction, preventing its crew from contacting the real Voyager. (VOY: "Course: Oblivion")

The spikes on the Romulan drone ship were subspace transceivers. By extension, the spikes at either end of the Earth Spacedock were probably also subspace transceivers.