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− | A '''hail''' |
+ | A '''hail''' was a form of [[subspace]] [[communication]] between [[starship]]s, [[starbase]]s, and other ports of call. It was in use since at least the mid-[[22nd century]] and could be digital (computerized messages), audio, or visual. |
− | Most hails |
+ | Most hails were visual, although routine operations could be handled by the computer or [[communications officer]] without requiring the [[commanding officer]]'s involvement. In addition, hails could be audio-only. The treaty ending the [[Earth-Romulan War]] was negotiated entirely over audio [[channel]]s, as neither side had the [[technology]] to send visual images to the other. {{incite}} |
− | A hail, whether audio, visual, or computerized, |
+ | A hail, whether audio, visual, or computerized, involved two-way communications. A hail was sent by one party, and needed to be responded to by the other to initiate communications. When a recipient was unwilling to accept a hail, a one-way [[wide-band subspace]] transmission could be initiated by "opening a channel," although it was customary to answer all hails. Such a message was usually not directed at any specific target, and there was no guarantee that it would not be intercepted even if it was earmarked for a specific recipient. In fact, there was no guarantee that it would be received at all. However, it could be reasonably assumed that any [[race]] that possessed the technology to receive these messages would probably view or listen to them out of curiosity, if nothing else. If needed, the receiving party could escalate the communication into a full two-way conversation by starting a return transmission. {{incite}} |
+ | {{bginfo|Hails were used in all incarnations of ''[[Star Trek]]''.}} |
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== Frequencies == |
== Frequencies == |
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− | There |
+ | There were many [[subspace frequency|subspace frequencies]] over which hails were sent. Most of the major [[power]]s, such as the [[United Federation of Planets]] and the [[Dominion]], had their own frequencies and protocols for sending messages such as [[distress call]]s, but there were also general frequencies. ({{DS9|Waltz}}) |
− | When contacting a starship or space station the normal command was "open hailing frequencies". ({{DS9|Dramatis Personae}} et al.) |
+ | When contacting a starship or space station the normal command was "open hailing frequencies". ({{TOS|The Corbomite Maneuver}}; {{DS9|Dramatis Personae}}, ''et al.'') |
⚫ | {{bginfo|Direct hail, such as establishing visual or audio contact, did not seem to require any special configuration to match frequencies, as numerous encounters with alien vessels took place without such complications. However, it is possible that the computer automatically searched for the proper band of subspace.}} |
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⚫ | {{bginfo|Direct hail, such as establishing visual or audio contact, |
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⚫ | Jamming of hailing frequencies was a common technique used for purposes such as disrupting enemy communication in battle and preventing vessels from emitting a distress call. Most jamming techniques did not prevent the jamming party from sending out its own hails. Of particular note was the [[Breen]] method of sending out a rotating [[electromagnetic pulse]]. ({{DS9|Sacrifice of Angels}}) |
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− | |||
⚫ | Jamming of hailing frequencies |
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== Types of hail == |
== Types of hail == |
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=== Non-contact hail === |
=== Non-contact hail === |
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− | Hailing |
+ | Hailing did not require direct communication with the other party; messages relating to routine procedure or an unimportant matter could be handled via [[computer]] signals. For example, when [[Jem'Hadar attack ship]]s requested [[ketracel-white]] from Dominion installations, the procedure was conducted entirely through computerized hails. It was more common for a computerized message to precede visual contact, however. ({{DS9|A Time to Stand}}) |
− | When dealing with a vessel or location whose hailing protocols or capabilities |
+ | When dealing with a vessel or location whose hailing protocols or capabilities were unknown, a general message could be sent over [[wide-band subspace]]. Additionally, wide-band subspace could be a technique for contacting anyone in the vicinity during dire situations. {{incite}} |
=== Standard hail === |
=== Standard hail === |
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− | The most common type of hail |
+ | The most common type of hail was through audio or visual contact. The recipient had to first accept the transmission in order to initiate such contact. |
− | Making visual contact |
+ | Making visual contact was normally standard, but it was not required. An audio link could be established when either a visual link was not possible or one did not wish to be seen. Some foreign entities were also incapable of a visual link and thus communicated over audio channels. |
− | The more common method |
+ | The more common method involved a two-dimensional display showing the party on the other end. The area displaying the image was known as the [[viewscreen]]. One could pause the hail, which briefly stopped the transmission, as well as mute the other side when necessary. {{incite}} |
− | Standard |
+ | Standard hailing normally took place between two parties, although three-way hails were possible and were used on occasion. ({{TNG|The Outrageous Okona}}; {{DS9|What You Leave Behind}}) |
=== Holo-communications === |
=== Holo-communications === |
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− | [[Holo-communicator]]s were a new type of communications device used briefly by the [[United Federation of Planets]] circa [[2374]]. They utilized [[holographic]] technology to create a life-size version of the person on the other end of the hail. As [[Captain]] [[Benjamin Sisko]] said to Captain |
+ | [[Holo-communicator]]s were a new type of communications device used briefly by the [[United Federation of Planets]] circa [[2374]]. They utilized [[holographic]] technology to create a life-size version of the person on the other end of the hail. As [[Captain]] [[Benjamin Sisko]] said to Captain {{dis|Sanders|Captain}} when he first used a holo-communicator, "''It looks like you're on my [[bridge]]!''" ({{DS9|For the Uniform}}) |
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− | Although holo-communicators had the potential to revolutionize hailing as we know it, this was not to be. It is possible that holo-communicators were too costly or incompatible with normal hailing devices; for whatever reason, they never saw wide use. |
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== Holo-filters == |
== Holo-filters == |
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− | [[ |
+ | [[File:Viterian.jpg|thumb|Captain Viterian as seen through a holo-filter]] |
− | When making visual contact, a person |
+ | When making visual contact, a person could often use a [[holo-filter]] to mask their appearance. However, if the transmitting ship was [[scan]]ned at close range, [[sensor]]s could alert the recipients to the person's true identity. ({{DS9|Second Skin}}) |
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− | == Background information == |
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− | * Hails have been used in all incarnations of ''Star Trek''. The exact point at which they were developed has never been stated. |
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− | |||
− | * Like [[subspace]] itself, the nature and specifics of hailing technology remain largely unexplored. |
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== See also == |
== See also == |
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− | *[[Subspace]] |
+ | * [[Subspace]] |
− | *[[Wide-band subspace]] |
+ | * [[Wide-band subspace]] |
+ | [[de:Grußfrequenz]] |
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[[Category:Subspace]] |
[[Category:Subspace]] |
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[[Category:Communications technology]] |
[[Category:Communications technology]] |
Revision as of 15:40, 24 January 2016
A hail was a form of subspace communication between starships, starbases, and other ports of call. It was in use since at least the mid-22nd century and could be digital (computerized messages), audio, or visual.
Most hails were visual, although routine operations could be handled by the computer or communications officer without requiring the commanding officer's involvement. In addition, hails could be audio-only. The treaty ending the Earth-Romulan War was negotiated entirely over audio channels, as neither side had the technology to send visual images to the other. (citation needed • edit)
A hail, whether audio, visual, or computerized, involved two-way communications. A hail was sent by one party, and needed to be responded to by the other to initiate communications. When a recipient was unwilling to accept a hail, a one-way wide-band subspace transmission could be initiated by "opening a channel," although it was customary to answer all hails. Such a message was usually not directed at any specific target, and there was no guarantee that it would not be intercepted even if it was earmarked for a specific recipient. In fact, there was no guarantee that it would be received at all. However, it could be reasonably assumed that any race that possessed the technology to receive these messages would probably view or listen to them out of curiosity, if nothing else. If needed, the receiving party could escalate the communication into a full two-way conversation by starting a return transmission. (citation needed • edit)
Frequencies
There were many subspace frequencies over which hails were sent. Most of the major powers, such as the United Federation of Planets and the Dominion, had their own frequencies and protocols for sending messages such as distress calls, but there were also general frequencies. (DS9: "Waltz")
When contacting a starship or space station the normal command was "open hailing frequencies". (TOS: "The Corbomite Maneuver"; DS9: "Dramatis Personae", et al.)
Many types of atmospheric disturbance and certain elements or compounds would prevent hailing signals from reaching their destination. Engineers could often find creative ways to solve this problem, but some conditions were impossible to penetrate. (citation needed • edit)
Jamming of hailing frequencies was a common technique used for purposes such as disrupting enemy communication in battle and preventing vessels from emitting a distress call. Most jamming techniques did not prevent the jamming party from sending out its own hails. Of particular note was the Breen method of sending out a rotating electromagnetic pulse. (DS9: "Sacrifice of Angels")
Types of hail
Non-contact hail
Hailing did not require direct communication with the other party; messages relating to routine procedure or an unimportant matter could be handled via computer signals. For example, when Jem'Hadar attack ships requested ketracel-white from Dominion installations, the procedure was conducted entirely through computerized hails. It was more common for a computerized message to precede visual contact, however. (DS9: "A Time to Stand")
When dealing with a vessel or location whose hailing protocols or capabilities were unknown, a general message could be sent over wide-band subspace. Additionally, wide-band subspace could be a technique for contacting anyone in the vicinity during dire situations. (citation needed • edit)
Standard hail
The most common type of hail was through audio or visual contact. The recipient had to first accept the transmission in order to initiate such contact.
Making visual contact was normally standard, but it was not required. An audio link could be established when either a visual link was not possible or one did not wish to be seen. Some foreign entities were also incapable of a visual link and thus communicated over audio channels.
The more common method involved a two-dimensional display showing the party on the other end. The area displaying the image was known as the viewscreen. One could pause the hail, which briefly stopped the transmission, as well as mute the other side when necessary. (citation needed • edit)
Standard hailing normally took place between two parties, although three-way hails were possible and were used on occasion. (TNG: "The Outrageous Okona"; DS9: "What You Leave Behind")
Holo-communications
Holo-communicators were a new type of communications device used briefly by the United Federation of Planets circa 2374. They utilized holographic technology to create a life-size version of the person on the other end of the hail. As Captain Benjamin Sisko said to Captain Sanders when he first used a holo-communicator, "It looks like you're on my bridge!" (DS9: "For the Uniform")
Holo-filters
When making visual contact, a person could often use a holo-filter to mask their appearance. However, if the transmitting ship was scanned at close range, sensors could alert the recipients to the person's true identity. (DS9: "Second Skin")