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Wormhole relay station in action
The wormhole relay station (2371)
Affiliation: Joint Federation-Cardassian-Bajoran
Type: Subspace communications relay
Destroyed: By the Dominion in 2373

The wormhole relay station was a subspace relay station that allowed communications from the Alpha Quadrant to pass through the Bajoran wormhole into the Gamma Quadrant between stardates 48543.2 and 50564.2.

Historical Background

Although communications through the wormhole were possible, it was unreliable and required the wormhole to be open while the transmissions occurred. Some attempts were made in 2370 to produce a reliable communications network that traversed the wormhole, but due to the wormhole's high interference, which consisted of unstable subspace carrier waves and high phase variances, the signal was not strong enough to pass through the wormhole. Subspace communications that bypassed the wormhole could take over 20 years to reach the Gamma Quadrant. (DS9: "Battle Lines", "The Alternate", "Whispers")

The disastrous first contact between the Dominion and the Federation created a growing need to have a reliable communications conduit to the Gamma Quadrant, so that Dominion activity could be monitored.

In 2371, the Bajorans put behind 50 years of hatred against the Cardassians when Vedek Bareil, under the auspices of Commander Benjamin Sisko, brokered a historic peace treaty between the Cardassian Union and Bajor which was signed by Legate Turrel and Kai Winn. This treaty paved the way for the wormhole relay station to be built. (DS9: "Life Support")

Construction and Deployment

Cardassian scientists

The Cardassian science team

The first joint Federation-Bajoran-Cardassian effort under the new peace treaty was to create a Gamma Quadrant relay station to aid communications between the two distant Quadrants. The Cardassian government would send three of its scientists, Ulani Belor, Gilora Rejal, and Dejar, to participate in the effort. However, former Vedek Yarka warned the Emissary, Benjamin Sisko, that the Cardassian involvement in the project would lead to the destruction of the wormhole according to Trakor's Third Prophecy which predicted that three vipers would destroy the Celestial Temple, but despite his objections Commander Sisko ordered the project to proceed because the Kai and Vedek Assembly already agreed on the project.

Wormhole relay station test fase

The Defiant encounters trouble testing the relay

In accordance with the project plans, the USS Defiant positioned the signaling satellite at the Bajoran end of the wormhole and deployed the relay station on the Gamma Quadrant side. While testing the relay station the crew discovered a comet whose trajectory would pass close to the wormhole. Major Kira saw this as a support to Yarka's claim about the prophecy.

When the first test of the relay produced no results, the team conducted a second test using a different subspace frequency. However, the second test inadvertently opened the wormhole, which increased it's gravity, and set the comet on a collision course with the wormhole.

Simply destroying the comet could have created multiple fragments, so Chief O'Brien modified the phasers of the Defiant to generate a wide beam that would encompass the entire comet and destroy it evenly. When the Defiant fired her phasers, however, a standard burst was fired instead, causing the comet to split into three pieces, all still on course for the wormhole. O'Brien's examination of the weapon system suggested he made a mistake, one that even a first-year engineering student wouldn't make, but Gilora told to him that Dejar was a member of the Obsidian Order and that she had sabotaged the phasers in an effort to undermine Cardassian-Bajoran relations by trying to let the relay project fail. It seemed the prophecy would fulfill itself like Yarka had told.

To save the relay project from a disaster, Sisko positioned a shuttle between the three comet fragments in an attempt to contain them while they passed through the wormhole. Despite leaking a little silithium, he and Kira successfully contained the fragments, and kept the wormhole intact. More importantly, the silithium which was inadvertently released during the procedure created a small subspace filament in the wormhole, large enough for the wormhole relay station to work. Sisko had fulfilled the prophecy, although not in the way Yarka explained it, and ensured that the wormhole would never close again.

Logistics

Wormhole relay station graphic

Schematic of the wormhole relay station

The wormhole relay station consisted of a Starfleet-produced signaling platform and was positioned two kilometers from the wormhole entrance. It also contained a Cardassian transceiver (devised by Ulani) that was powered by a Starfleet power grid. The transceiver assembly would send a subspace carrier wave through the wormhole to a second transceiver, located on Deep Space 9.

The transceiver used soliton pulses, carefully tuned to eliminate any phase variance below 0.005%, to minimize the impact on the wormhole. Ulani and Gilora improved the station's signaling array so it could accommodate the new transmissions (and removed O'Brien's secondary backup of the station's system in the process), however, the simulations showed that transmission frequencies in the delta bands would not work, and the theta bands frequencies could create a subspace inversion. In essence it was the subspace filament that allowed transmissions to occur, this filament (created when the comet's silithium reacted with the wormhole's ambient radiation) was a thin trail that acted like a subspace carrier wave and helped to carry transmissions through the bends of the wormhole. (DS9: "Destiny")

Service Record

The subspace relay station played an important part of communications while Starfleet explored the Gamma Quadrant.

In Julian Bashir's coma-induced reality created by the Lethean Altovar, a simulation of Chief O'Brien managed to communicate to the outside using the relay station. It revealed the voices of Jadzia Dax and Sisko in the real world, trying to revive Bashir from the telepathic damage caused by the Lethean. (DS9: "Distant Voices")

When Enabran Tain was about to destroy the homeworld of the Founders, Starfleet ordered Sisko to stay put and protect Bajor, but Sisko wanted to rescue Odo, being held captive by Tain, and decided to pursue him. If Sisko found any Dominion coming through the wormhole, he would warn the Alpha Quadrant using the communications relay. (DS9: "The Die is Cast")

Before General Martok invaded Cardassia and started the Second Federation-Klingon War, he was ordered to protect Deep Space 9 in event of an attack by the Dominion, who had placed changelings throughout the Alpha Quadrant. Captain Sisko politely refused the offer for help, citing the fact that the communications relay picked up no Jem'Hadar activity near the wormhole. (DS9: "The Way of the Warrior")

Lieutenant Arriaga, under orders from Admiral Leyton, attempted to mislead Starfleet into thinking the Dominion were sending cloaked ships to the Alpha Quadrant. He did so by attaching a subspace modulator to the communications satellite. The modulator had the effect of making the wormhole open and close at random. (DS9: "Homefront", "Paradise Lost")

When O'Brien was convicted of spying on the Argrathi government, the Argrathis communicated to the station via the wormhole relay. (DS9: "Hard Time")

Bashir used the relay station a number of times during his individual missions in the Gamma Quadrant, such as when he tried to cure the Jem'Hadar of their ketracel-white addiction on Bopak III, and when he cured the Teplans of the Teplan blight.(DS9: "Hippocratic Oath", "The Quickening")

When Sisko, Worf, Jadzia Dax, Muniz and O'Brien were trapped in a Jem'Hadar attack ship on Torga IV, Sisko used the communications relay to request the services of the Defiant. (DS9: "The Ship")

The relay station's most useful mission came when Worf and Elim Garak took a runabout to locate Tain, who was captured by the Dominion after his failed attempt to destroy the Founders homeworld. When they found a Dominion fleet hiding in a nebula close to the wormhole, Worf managed to send a message to the relay and warned Deep Space Nine of an impending invasion. The relay's primary mission (to detect when the Dominion would invade the Alpha Quadrant) had been fulfilled.

With the message received, the wormhole relay station (and its associated outposts) were disabled by the Dominion fleet. (DS9: "In Purgatory's Shadow")

Starfleet had little use for a relay during the Dominion War, as they could no longer venture into Dominion space, on the other side of the wormhole.

Background

The relay station model was a minor modification of the Amargosa observatory model from Star Trek: Generations. The prop master shortened the two long pylons, removed the ropes previously attached to the antennae, and modified the central probe to create the appearance of a dish. The relay station's only appearance on screen was in the episode "Destiny".

In "Children of Time", it appeared that the relay station was still in operation and not destroyed. The crew created a probe that contained goodbye messages that they launched, it emitted a Starfleet signal that would contain the coordinates of the probe. Emitting a signal in Dominion space would have only made sense if the relay station was still active.

The Dominion was able to communicate with the Gamma Quadrant listening posts in "Sacrifice of Angels", but it is not clear whether they had re-used Starfleet's Wormhole station, or created their own relay.

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