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Radio communication technologies (view source)
Revision as of 02:55, December 12, 2014
, 02:55, December 12, 2014Created rough draft of new article
There are many types of [[communication]]s [[technology|technologies]] that have been [[invention|invented]] since the mid 19th century.
==Licensed Two-way==
In order to operate on these frequencies in the [[United States]], you will need to get an [[FCC]] [[license]]. The license may be as simple as [[taxation|paying a fee]] or you may be required to take a test. There are specific [[frequency|frequencies]] and [[power]] limitations that you must adhere to.
{| border="1"
!Name
!Band
!Range
!Cost
!License
!Class
!Description
|-
|[[Amateur_radio|HAM Radio]]
|HF UHF VHF Microwave
|Global
|$60-unlimited
|Written Test
|HPMB
|extremely powerful, long range amateur network.
|-
|[[GMRS]](General Mobile Radio Service)
|UHF
|1-5 miles
|$50
|$85 Fee (18+)
|HPMB
|land-mobile radio service available for short-distance, two-way communications to facilitate the activities of a licensed operator
|-
|Marine HF
|HF
|Global
|$300-unlimited
|Fee
|M
|Marine HF are several frequencies that usually operate in [[Single side band]] ([[SSB]]) mode. They operate around 4MHz and enable ships at sea to communicate globally both in voice and with data.
|-
|Business band
|VHF UHF
|few miles
|$300+
|Fee
|HPMB
|a generic term that applies to everything from the trash collectors and dog catchers to [[police]], [[fire]], [[EMS]], and to corporations like [[McDonalds]] for their drive-thru systems. The licenses are all a similar class, although each usually is in a different subclass.
|}
Class legend:
* H - Handheld
* P - Portable
* M - Mobile
* B - Base
==Unlicensed Two-way==
These are unlicensed frequencies. This means that you can buy a radio and operate it without any forms or fees to submit. There are often restrictions on how you may use the particular radio device, some do not let you replace the antenna or may any modifications to the device itself. In general these are lower power devices than the licensed communications systems. You should check the [[radio legalities]] involved before operating unlicensed radios just to ensure you do not violate any rules.
{| border="1"
!Name
!Band
!Range
!Cost
!Class
!Description
|-
|Marine VHF
|VHF
|1-5 miles
|$100-1500
|HM
|Frequencies allocated for short range ship to ship and ship to land communication. Frequently used to communicate with other ships while in port.
|-
|[[CB Radio]]
|HF
|1-155 miles
|$30-250
|HMB
|a well established and commonplace technology often used by Truckers and travelers and people sitting at home wanting to chat. With better [[homebrew antennas|antennas]] in SSB mode you can exceed the maximum legal distance of 155 miles.
|-
|[[FRS]](Family Radio Service)
|UHF
|0.5 miles
|$20
|H
|Very common low power handheld radios.
|-
|[[MURS]]
|VHF
|5 miles
|$40-250
|HB
|5 channels, used from everything to remote motion sensors, to voice communications, to misc other apps.
|-
|Wifi
|Microwave
|100 feet-10 miles
|$20-1500
|MB
|a data protocol primarily for connecting [[computer]]s, [[mobile device]]s like [[smartphone]]s and [[tablet computer|tablets]], [[PDA]]s and other [[network]]ed devices together [[wireless]]ly. Some devices have a considerable range, and adding a quality [[antenna]] to these can extend their range, although usually at the expense of making them cover a smaller geographic area. This is a good general purpose multi-user high speed data link. Range can be anywhere from a few feet to a few miles based on a wide variety of factors.
|-
|[[Bluetooth]]
|Microwave
|1-100 yards
|$5-50
|HM
|designed to be a [[cable]] replacement. There are 3 different levels of [[Bluetooth]] devices, some of which go up to 100m range. If a quality antenna is added range can be extended further. Since Bluetooth is designed to replace cables, it is only intended to have a limited number of devices connect concurrently. At most with a piconet you can have 7 devices connected. This can be a method to exchange data in close proximity, such as maps, frequency plans, or other data.
|}
Class legend:
* H - Handheld
* P - Portable
* M - Mobile
* B - Base
==Broadcasting==
Broadcasters are one-way communications designed to convey entertainment, educational, or other content to an audience. The most common form of broadcasting is Television, but it also includes commercial AM/FM stations such as those received by your home or car stereo.
===Commercial AM/FM===
Publicly broadcast [[AM/FM]] radio is an excellent source of up-to-date information that can be easily accessed with inexpensive, portable devices. It is strictly one-way. Commercial AM broadcasts are capable of traveling thousands of miles under the right atmospheric conditions.
===Shortwave===
Publicly broadcast [[Shortwave]] radio is similar to AM/FM radio in that it is a one-way medium that provides excellent information, like commercial AM it is capable of traveling long distances (around the world) with relatively low power. This makes it extremely valuable if whatever emergency being experienced knocks out local broadcasts.
===Television===
[[Television]] can be useful for information during an emergency, but is generally much less so that audio-only formats as it is more likely to fail, requires more complex equipment that is almost never portable, and is generally less likely to provide a constant source of relevant information.
==Telephone==
===Landline===
[[Landline]] [[telephone]]s are a somewhat difficult to predict method of communication. While the protocols and technologies are relatively reliable with a power source that operates even when the grid is down, the cabling infrastructure is fragile. Also, the very nature of landline phones makes them a strictly stationary form of communication.
===Cellular (CMRS)===
[[Cellular telephones]] are a unique form of communication. The provide they private, point-to-point communication of landlines with the mobility of radio. Cell phones also offer text communication which has many advantages over voice in some situations. The difficulty with cell phones is their reliance upon complex infrastructure which may or may not remain active during an emergency. The FCC refers to cellular/mobile phones as Commercial Mobile Radio Service (CMRS), and non US based people generally refer to it as mobile telephones as opposed to cellular, but it's all the same stuff.
===Satellite===
[[Satellite phone]]s are a relatively new technology with the advantage of being useful almost anywhere on Earth. Unfortunately they are expensive to purchase and maintain service, and while they should function longer than that typical cell phones after a disaster, if the disaster is not localized they too will eventually fail.
===VoIP===
[[Voice over IP]] ([[VoIP]]) is a method that takes your speech, generally compresses it, and sends it via an [[TCP/IP]] network to another person who will decompress it and play the audio. This allows you to make a telephone call over the internet instead of using the traditional telephone system. Multiple locations in a [[PAW]] may be able to set up a [[Wifi]] link between the locations and they could use VoIP to utilize the same data link they have for voice traffic as well. This would enable multiple concurrent telephone calls over the single link, providing both ends have enough equipment on hand to accomplish this.
==See Also==
{{template:Radio communications}}
==References==
{{reflist|2}}
[[Category:Amateur radio]]
[[Category:Cryptography]]
[[Category:Military]]
[[Category:Electronics]]
[[Category:Radio]]
[[Category:Hobbies]]
[[Category:Investments in Tangibles]]
[[Category:Survivalism]]
[[Category:Media]]
[[Category:Technology]]
[[Category:Telecommunications]]
[[Category:Communication]]
[[Category:Computer Security]]
[[Category:American Inventions]]
[[Category:Espionage]]
[[Category:United States Intelligence Agencies]]
[[Category:Technology]]
[[Category:Internet]]
[[Category:Open source]]
[[Category:Computer Science]]
==Licensed Two-way==
In order to operate on these frequencies in the [[United States]], you will need to get an [[FCC]] [[license]]. The license may be as simple as [[taxation|paying a fee]] or you may be required to take a test. There are specific [[frequency|frequencies]] and [[power]] limitations that you must adhere to.
{| border="1"
!Name
!Band
!Range
!Cost
!License
!Class
!Description
|-
|[[Amateur_radio|HAM Radio]]
|HF UHF VHF Microwave
|Global
|$60-unlimited
|Written Test
|HPMB
|extremely powerful, long range amateur network.
|-
|[[GMRS]](General Mobile Radio Service)
|UHF
|1-5 miles
|$50
|$85 Fee (18+)
|HPMB
|land-mobile radio service available for short-distance, two-way communications to facilitate the activities of a licensed operator
|-
|Marine HF
|HF
|Global
|$300-unlimited
|Fee
|M
|Marine HF are several frequencies that usually operate in [[Single side band]] ([[SSB]]) mode. They operate around 4MHz and enable ships at sea to communicate globally both in voice and with data.
|-
|Business band
|VHF UHF
|few miles
|$300+
|Fee
|HPMB
|a generic term that applies to everything from the trash collectors and dog catchers to [[police]], [[fire]], [[EMS]], and to corporations like [[McDonalds]] for their drive-thru systems. The licenses are all a similar class, although each usually is in a different subclass.
|}
Class legend:
* H - Handheld
* P - Portable
* M - Mobile
* B - Base
==Unlicensed Two-way==
These are unlicensed frequencies. This means that you can buy a radio and operate it without any forms or fees to submit. There are often restrictions on how you may use the particular radio device, some do not let you replace the antenna or may any modifications to the device itself. In general these are lower power devices than the licensed communications systems. You should check the [[radio legalities]] involved before operating unlicensed radios just to ensure you do not violate any rules.
{| border="1"
!Name
!Band
!Range
!Cost
!Class
!Description
|-
|Marine VHF
|VHF
|1-5 miles
|$100-1500
|HM
|Frequencies allocated for short range ship to ship and ship to land communication. Frequently used to communicate with other ships while in port.
|-
|[[CB Radio]]
|HF
|1-155 miles
|$30-250
|HMB
|a well established and commonplace technology often used by Truckers and travelers and people sitting at home wanting to chat. With better [[homebrew antennas|antennas]] in SSB mode you can exceed the maximum legal distance of 155 miles.
|-
|[[FRS]](Family Radio Service)
|UHF
|0.5 miles
|$20
|H
|Very common low power handheld radios.
|-
|[[MURS]]
|VHF
|5 miles
|$40-250
|HB
|5 channels, used from everything to remote motion sensors, to voice communications, to misc other apps.
|-
|Wifi
|Microwave
|100 feet-10 miles
|$20-1500
|MB
|a data protocol primarily for connecting [[computer]]s, [[mobile device]]s like [[smartphone]]s and [[tablet computer|tablets]], [[PDA]]s and other [[network]]ed devices together [[wireless]]ly. Some devices have a considerable range, and adding a quality [[antenna]] to these can extend their range, although usually at the expense of making them cover a smaller geographic area. This is a good general purpose multi-user high speed data link. Range can be anywhere from a few feet to a few miles based on a wide variety of factors.
|-
|[[Bluetooth]]
|Microwave
|1-100 yards
|$5-50
|HM
|designed to be a [[cable]] replacement. There are 3 different levels of [[Bluetooth]] devices, some of which go up to 100m range. If a quality antenna is added range can be extended further. Since Bluetooth is designed to replace cables, it is only intended to have a limited number of devices connect concurrently. At most with a piconet you can have 7 devices connected. This can be a method to exchange data in close proximity, such as maps, frequency plans, or other data.
|}
Class legend:
* H - Handheld
* P - Portable
* M - Mobile
* B - Base
==Broadcasting==
Broadcasters are one-way communications designed to convey entertainment, educational, or other content to an audience. The most common form of broadcasting is Television, but it also includes commercial AM/FM stations such as those received by your home or car stereo.
===Commercial AM/FM===
Publicly broadcast [[AM/FM]] radio is an excellent source of up-to-date information that can be easily accessed with inexpensive, portable devices. It is strictly one-way. Commercial AM broadcasts are capable of traveling thousands of miles under the right atmospheric conditions.
===Shortwave===
Publicly broadcast [[Shortwave]] radio is similar to AM/FM radio in that it is a one-way medium that provides excellent information, like commercial AM it is capable of traveling long distances (around the world) with relatively low power. This makes it extremely valuable if whatever emergency being experienced knocks out local broadcasts.
===Television===
[[Television]] can be useful for information during an emergency, but is generally much less so that audio-only formats as it is more likely to fail, requires more complex equipment that is almost never portable, and is generally less likely to provide a constant source of relevant information.
==Telephone==
===Landline===
[[Landline]] [[telephone]]s are a somewhat difficult to predict method of communication. While the protocols and technologies are relatively reliable with a power source that operates even when the grid is down, the cabling infrastructure is fragile. Also, the very nature of landline phones makes them a strictly stationary form of communication.
===Cellular (CMRS)===
[[Cellular telephones]] are a unique form of communication. The provide they private, point-to-point communication of landlines with the mobility of radio. Cell phones also offer text communication which has many advantages over voice in some situations. The difficulty with cell phones is their reliance upon complex infrastructure which may or may not remain active during an emergency. The FCC refers to cellular/mobile phones as Commercial Mobile Radio Service (CMRS), and non US based people generally refer to it as mobile telephones as opposed to cellular, but it's all the same stuff.
===Satellite===
[[Satellite phone]]s are a relatively new technology with the advantage of being useful almost anywhere on Earth. Unfortunately they are expensive to purchase and maintain service, and while they should function longer than that typical cell phones after a disaster, if the disaster is not localized they too will eventually fail.
===VoIP===
[[Voice over IP]] ([[VoIP]]) is a method that takes your speech, generally compresses it, and sends it via an [[TCP/IP]] network to another person who will decompress it and play the audio. This allows you to make a telephone call over the internet instead of using the traditional telephone system. Multiple locations in a [[PAW]] may be able to set up a [[Wifi]] link between the locations and they could use VoIP to utilize the same data link they have for voice traffic as well. This would enable multiple concurrent telephone calls over the single link, providing both ends have enough equipment on hand to accomplish this.
==See Also==
{{template:Radio communications}}
==References==
{{reflist|2}}
[[Category:Amateur radio]]
[[Category:Cryptography]]
[[Category:Military]]
[[Category:Electronics]]
[[Category:Radio]]
[[Category:Hobbies]]
[[Category:Investments in Tangibles]]
[[Category:Survivalism]]
[[Category:Media]]
[[Category:Technology]]
[[Category:Telecommunications]]
[[Category:Communication]]
[[Category:Computer Security]]
[[Category:American Inventions]]
[[Category:Espionage]]
[[Category:United States Intelligence Agencies]]
[[Category:Technology]]
[[Category:Internet]]
[[Category:Open source]]
[[Category:Computer Science]]