802.11a podporuje rychlosti až 54 Mbps a signál je regulován ve spektru okolo 5GHz. Tato frekvence s porovnáním 802.11b nabízí překonání vyšších vzdáleností a rychlejší, spolehlivější a kvalitnější přenos dat. Díky vyšší frekvenci má ale signál problém přejít přes různé překážky. U 802.11b nebyl nijak velký problém překonat vršky stromů, či jiné, podobné překážky, u 802.11a tomu již problém je. A je tedy především nutný přímý výhled. Dále se tato frekvence nehodí na tzv. „domácí wifi AP“.
Protože 802.11a a 802.11b fungují na odlišných frekvencích, nejsou spolu kompatibilní. Můžeme najít zařízení, které umí komunikovat jak v 802.11b/g/a, ale není možné spojit různé frekvence dohromady.
Použití
Používání standardu 802.11a se v ČR stalo poměrně rychlým jevem slibujícím stabilnější a rychlejší připojení. 5GHz pásmo také netrpí tím, čím trpělo pásmo 2,4GHz (interference s jinými spotřebiči, překrývání kanálů). Standard 802.11a nám tedy dává oproti 802.11b/g mnohem větší výhodu, ačkoliv je zařízení dražší.
V České Republice máme pásmo rozdělené na tzv. indoor a outdoor definované GL ČTÚ
Indoor
- 5150-5250 MHz (zkráceně 5.1 GHz): použití pouze uvnitř budov, maximální hustota vyzářeného výkonu 23 dBi tj. 200 mW EIRP (přesněji 0.25 MHz/25 MHz v každém 25 MHz úseku)
- 5250-5350 MHz (zkráceně 5.2 GHz): stejné jako výše, navíc ale je max. hustota výkonu definována jako (10 mW/MHz v libovolném 1 MHz úseku. Zařízení v tomto pásmu navíc MUSÍ být vybaveny automatickou regulací výkonu, která může snížit podle podmínek výstupní výkon zařízení na polovinu (-3 dB). Tato regulace ale nemusí být zapnuta, potom ovšem je maximální vyzářený výkon poloviční vždy, tj. 100 mW EIRP. Zařízení se také musí umět automaticky naladit na frekvenci, kde není v provozu radar fungující na stejné frekvenci a to může být problém.
Outdoor
- 5470-5725 MHz (zkráceně 5.4 GHz): použití uvnitř i vně budov, maximální vyzářený výkon 1 W EIRP (30 dBi). I zde ale platí podmínka o vybavenosti automatickou regulací výkonu se stejnými pravidly, tj. není-li regulace zapnuta, je max. vyzářený výkon 0.5W (27 dBi) a podmínka o automatickém přelaďování.
První dvě pásma jsou tedy určena především pro vnitřní instalace. Využitím tedy pro venkovní prostředí bude pásmo třetí, které má 10x vyšší maximální hustotu vyzářeného výkonu než pásmo 802.11b/g a až 100x vyšší, než pásmo 5725 – 5850 MHz
11 kanálů, které se vzájemně nepřekrývají, tzn. Na jednom místě můžeme použít až 11 navzájem se nerušících sítí a pokud použijeme opačné polarizace a vše umístíme tak, abychom došli k co nejmenšímu rušení mezi polarizacemi, můžeme mít téměř až 22 navzájem se nerušících sítí.
5,7 – 5,8GHz
Provoz v tomto pásmu je legální.
Zařízení musí splnovat požadavky na frekvenční rozsah 5725 – 5875 MHz, má maximální vysílací výkon 25mW.
Anténa předepsaná výrobcem?
V pásmu 5GHz se čím dál více hovoří o anténách předepsaných výrobcem, co to znamená?
- Podle platné GL (pro pásmo 5,2 a 5,8 GHz) je třeba použít pouze „antény předepsané výrobcem“.
- V prohlášení o shodě, návodu nebo na webových stránkách výrobce uvádí, které antény je přípustné se zařízením použít.
- Není možné použít „domácky“ vyrobené antény.
Připojení
Jak jsme si již řekli u 2,4GHz, je potřeba aktivní a pasivní prvek. V tomto případě není možná žádná domácí výroba, ale oba prvky musí splňovat GL ČTÚ.
Opět se jedná tedy o anténu jako pasivní prvek s kabelem a klientské zařízení jako o aktivní prvek. Klientské zařízení může být opět klasická „krabička“, případně řešení „All in one“ spolu s anténou nebo PCI karta ve sběrnici našeho počítače.
Protože je frekvence 5GHz mnohem více pohlcována překážkami je třeba dodržet podmínku – přímý výhled.
Komentáře
https://www.schoolfamily.com/images/photos/11612/3260/21fd5e77e824b98a476e3ba8.jpg
But you can fix this issue fast. There is a tool that generates articles
like human, just search in google: miftolo's tools
generic viagra 100mg next day what if viagra doesn't work viagra samples what does female viagra do for weman levitra v. viagra
https://viagrnetwork.com/# - over the counter viagra
http://thedailystatesman.com/index.php/component/k2/item/343-2-day-tour-of-upper-east-region
http://www.archiwum.info.kety.pl/index.php?view=detail&id=205&option=com_joomgallery&Itemid=122
http://icef.com.co/index.php/component/k2/item/2536-resolucion-679-certifica-categorizacion-de-las-entidades-territoriales
https://www.tdedchangair.com/webboard/viewtopic.php?f=9&t=104910
http://forum.digilyze.info/viewtopic.php?f=2&t=814900
quick payday loans wichita ks quick online payday loans [url=http://inf omka.ru/ ]quick loan faxless quick payday loans quick approval personal loans
quick loans deposit same day quick and loans odds to win 2017 [url=http://www .lawneed.ru/ ]quick loan quick online business loans cash loans quick
quick cash online loans quick installment loans online review [url=https://pa ydailoanz.com/# ] quick loan quick and easy personal loans online safe quick loans
https://paydailoanz.com/# - quick loans
quick cash loans broken arrow quick loans in pell city alabama quick loan quick payday loans wichita ks quick cash loans no credit check reviews
https://paydailoanz.com/# - quick loans
make money from home make money work from home homemade items that make money how does craigslist make money
https://make-money-blogs.com/# - work from home
how to make money on the internet how to make money on facebook make money how do you make money on youtube woodworking ideas to make money
https://make-money-blogs.com/# - work from home
how to start a blog and make money how to make money on youtube work from home how much money can i make on social security make money now instant payout
https://make-money-blogs.com/# - work from home
how to make money make money online from home make money how to make money online how to earn money online or gift cards to amazon make extra money from home
https://make-money-blogs.com/# - make money
how to make money in gta 5 ways to make money online make money photos imgclick easily make money sharing will friends social free file upload how to make quick money
https://make-money-blogs.com/# - make money
make extra money apps to make money work from home how to make extra money from home easy ways to make money
http://www.smartarchitect.ru/ - make money
make money blogging ways to make money online work from home ways to make money on the side make money
http://orendetsad77.ru/ - work from home
make money fast legit ways to make money online make money how to make money quick how much money can you make on youtube
https://kotomur.ru/ - make money
how do you make money on youtube make money at home work from home how to make easy money how did betsy devos make her money
https://imydogpes.ru/ - make money
how to make money on youtube how to make money on facebook make money ways to make money from home how to make money on amazon
http://bikesell.ru/ - work from home
coronavirus statistics coronavirus uk ‌‌buy coronavirus dan patrick coronavirus symptoms of coronavirus
https://pharm-usa-official.com/coronavirus/# - ‌‌buy coronavirus
texanischer vize-gouverneur coronavirus coronavirus aktuell coronavirus treatment scarface coronavirus coronavirus symptoms
https://pharm-usa-official.com/coronavirus/# - coronavirus deutschland
https://theliot.fr/2019/07/comment-choisir-son-nettoyeur-vapeur/?unapproved=26425&moderation-hash=c78a226f34cf74b0df8813c320bf662d#comment-26425
https://www.anastacia.cz/index.php/anastaciacom-v-novem-kabate?page=1
https://www.gemeentegidsharlingen.nl/kantoor-notaris-heeres/#comment-110708
https://www.hotelchandraresidency.com/traffic-control-test-by-new-york-cabs/?unapproved=36814&moderation-hash=39cbfbb948581e1def98ca498dcf3d6e#comment-36814
http://dianews.ge/dgis/4861--.html
mohegan sun casino
https://playcasinoslotsx.com - foxwoods casino
how to lose weight fast
best way to lose weight
https://weight-loss-blogs.com - weight watchers
how to make money fast
how to get money
https://make-money-blogs.com - how to get money
hard rock casino atlantic city
https://playcasinoslotsx.com - akwesasne mohawk casino hogansburg ny
diet plan
lose weight
https://weight-loss-blogs.com - weight loss calculator
how to make money fast
how to make
https://make-money-blogs.com - how to make money
high 5 casino
https://playcasinoslotsx.com - vegas world casino
how to lose weight quick
how to lose weight fast
https://weight-loss-blogs.com - weight loss calculator
how to make
how to make money from home
https://make-money-blogs.com - how to earn money
pof dating
https://bestdatingsitesgo.com/ - plenty of fish dating site
homeowners insurance
american general life insurance company
https://homecarinsurancex.net/ - farmers insurance
movie showtimes
watch movies online free
https://watchfreemoviesonlinez.net/ - cars the movie
cars the movie
avengers: endgame movie
https://watchfreeonlinex.com - best movie villains
how to write a narrative essay
mla essay format
http://writeessaywow.com - mla essay format
free casino
https://playcasinoslotsx.com - hard rock casino atlantic city
lose weight fast
weight watchers
https://weight-loss-blogs.com - weight calculator
how to earn money online
how to make
https://make-money-blogs.com - how to earn money
firekeepers casino
https://playcasinoslotsx.com - free casino games vegas world
weight watchers
how to lose weight quick
https://weight-loss-blogs.com - how to lose weight quick
how to make money from home
how to make
https://make-money-blogs.com - how to earn money online
who is blake shelton dating
https://bestdatingsitesgo.com/ - dating site
farmers insurance
the general insurance
https://homecarinsurancex.net/ - aetna insurance
free movies online
high fidelity movie
https://watchfreemoviesonlinez.net/ - high fidelity movie
movie & tv
watch movies online free
https://watchfreeonlinex.com - movie theaters near me
write my essay
essay typer
http://writeessaywow.com - persuasive essay examples
senior dating
https://bestdatingsitesgo.com/ - tinder dating site
travelers insurance login
auto insurance quotes
https://homecarinsurancex.net/ - liberty mutual insurance
best movie villains
movie & tv
https://watchfreemoviesonlinez.net/ - free movies online
a hard day's night movie
movie theaters near me
https://watchfreeonlinex.com - windows movie maker
essay examples
scholarship essay
http://writeessaywow.com - how many paragraphs in an essay
akwesasne mohawk casino hogansburg ny
https://playcasinoslotsx.com - hollywood casino free slots
how to lose weight
how to lose weight in a week
https://weight-loss-blogs.com - weight loss
how to make money fast
how to make
https://make-money-blogs.com - how to make money online
dating
https://bestdatingsitesgo.com/ - kfc dating sim
the general auto insurance
farmers insurance
https://homecarinsurancex.net/ - farmers insurance login
high fidelity movie
rocketman movie
https://watchfreemoviesonlinez.net/ - high fidelity movie
rocketman movie
avengers: endgame movie
https://watchfreeonlinex.com - high fidelity movie
check my essay
5 paragraph essay
http://writeessaywow.com - essay maker
who is blake shelton dating
https://bestdatingsitesgo.com/ - tinder dating site
globe life insurance login
grange insurance
https://homecarinsurancex.net/ - dental insurance for seniors
rocketman movie
movie & tv
https://watchfreemoviesonlinez.net/ - movie showtimes
july movie releases
rocketman movie
https://watchfreeonlinex.com - cars the movie
what is an essay
essay grader
http://writeessaywow.com - how to write a narrative essay
san manuel casino
https://playcasinoslotsx.com - double u casino
best way to lose weight
lose weight
https://weight-loss-blogs.com - diet
how to earn money online
how to make money online
https://make-money-blogs.com - how to earn money
pof dating site
https://bestdatingsitesgo.com/ - plenty of fish dating site
esurance auto insurance
vsp vision insurance
https://homecarinsurancex.net/ - progressive auto insurance
free Movies
movie & tv
https://watchfreemoviesonlinez.net/ - rocketman movie
avengers: endgame movie
july movie releases
https://watchfreeonlinex.com - movie theaters near me
5 paragraph essay outline
what is an essay
http://writeessaywow.com - argumentative essay
dating websites
https://bestdatingsitesgo.com/ - silver singles dating site
erie insurance
infinity insurance
https://homecarinsurancex.net/ - hartford insurance login
windows movie maker
avengers: endgame movie
https://watchfreemoviesonlinez.net/ - windows movie maker
watch movies online free
movie & tv
https://watchfreeonlinex.com - movie & tv
essay writer free
essay bot
http://writeessaywow.com - literary analysis essay example
plenty of fish dating site
https://bestdatingsitesgo.com/ - dating online
vsp vision insurance
term life insurance
https://homecarinsurancex.net/ - general insurance
watch movies online free
movie theaters near me
https://watchfreemoviesonlinez.net/ - movie theaters near me
avengers: endgame movie
movie showtimes
https://watchfreeonlinex.com - cars the movie
descriptive essay
how to start an essay
http://writeessaywow.com - essay rewriter
facebook dating
https://bestdatingsitesgo.com/ - dating sites free
grange insurance
allianz travel insurance
https://homecarinsurancex.net/ - hartford insurance
windows movie maker
free movies online
https://watchfreemoviesonlinez.net/ - watch online
movie theaters near me
free movies online
https://watchfreeonlinex.com - july movie releases
mla essay
scholarship essay
http://writeessaywow.com - how to write a essay
online dating
https://bestdatingsitesgo.com/ - silver singles dating site
cigna health insurance
erie insurance bill pay
https://homecarinsurancex.net/ - nationwide insurance
windows movie maker
free movies online
https://watchfreemoviesonlinez.net/ - free Movies
watch online
watch movies online free
https://watchfreeonlinex.com - mtv movie
free essay generator
persuasive essay examples
http://writeessaywow.com - literary analysis essay example
pof dating
https://bestdatingsitesgo.com/ - pof dating site
state farm insurance login
hartford insurance login
https://homecarinsurancex.net/ - term life insurance
cars the movie
july movie releases
https://watchfreemoviesonlinez.net/ - free movies online
free movies online
watch movies online free
https://watchfreeonlinex.com - watch movies online free
essay checker
persuasive essay topics
http://writeessaywow.com - argument essay topics
facebook dating
https://bestdatingsitesgo.com/ - who is blake shelton dating
combined insurance
hartford insurance
https://homecarinsurancex.net/ - geico insurance quote
watch movies online free
free Movies
https://watchfreemoviesonlinez.net/ - high fidelity movie
rocketman movie
mtv movie
https://watchfreeonlinex.com - avengers: endgame movie
essay writer
how to write a college essay
http://writeessaywow.com - free essay writer
ultram
https://make-money-blogs.com/order.php - buy tramadol
buy ultram
buy tramadol
https://superpillsx.com/ - buy ultram
buy ultram
https://make-money-blogs.com/order.php - ultram
buy ultram
buy tramadol
https://superpillsx.com/ - ultram
tramadol
https://make-money-blogs.com/order.php - ultram
buy tramadol
buy ultram
https://superpillsx.com/ - ultram
buy ultram
https://make-money-blogs.com/order.php - buy ultram
ultram
buy ultram
https://superpillsx.com/ - tramadol
can you take ibuprofen and tylenol
https://drugstoreonliner.com/tylenol.php - what is tylenol
trazodone for sleep
trazodone side effects
https://drugstoreonliner.com/trazodone.php - trazodone dosage
what is cipro used for
cipro for sinus infection
https://drugstoreonliner.com/cipro.php - cipro side effects
lexapro reviews
lexapro reviews
https://drugstoreonliner.com/lexapro.php - lexapro withdrawal symptoms
xarelto dosing
xarelto coupons printable coupons
https://drugstoreonliner.com/xarelto.php - xarelto
cymbalta side effects
cymbalta medication
https://drugstoreonliner.com/cymbalta.php - side effects of cymbalta
buy tramadol
https://make-money-blogs.com/order.php - ultram
tramadol
ultram
https://superpillsx.com/ - ultram
buy ultram
https://make-money-blogs.com/order.php - tramadol
buy ultram
buy ultram
https://superpillsx.com/ - ultram
buy ultram
https://make-money-blogs.com/order.php - buy tramadol
buy ultram
buy ultram
https://superpillsx.com/ - tramadol
buy ultram
https://make-money-blogs.com/order.php - buy ultram
buy ultram
buy ultram
https://superpillsx.com/ - tramadol
buy viagra online
https://goodshoprx.com/ - female viagra pills
online viagra
https://goodshoprx.com/ - viagra otc
female viagra pills
https://goodshoprx.com/ - generic viagra online
viagra side effects
https://goodshoprx.com/ - otc viagra
viagra generic
https://goodshoprx.com/ - online viagra
viagra pill
https://goodshoprx.com/ - viagra
viagra pill
https://buygenericviagronline.com/ - viagra
online viagra
female viagra pills
https://doctormedweb.com/ - viagra for sale
cheap viagra
online viagra
https://webmedicxxx.com/ - online viagra
otc viagra
https://buygenericviagronline.com/ - natural viagra
generic viagra
viagra 100mg
https://doctormedweb.com/ - generic viagra online
viagra
100mg viagra
https://webmedicxxx.com/ - otc viagra
100mg viagra
https://buygenericviagronline.com/ - viagra online
viagra online
viagra for sale
https://doctormedweb.com/ - female viagra pills
viagra otc
viagra prices
https://webmedicxxx.com/ - herbal viagra
cialis generic date
https://wowcialisnow.com/ - canadian pharmacy cialis
cialis cheap cialis
cialis dosage
https://cialismans.com/ - cialis 10mg
tadalafil 40 mg
generic cialis for daily use
https://xtadalafilx.com/ - tadalafil mylan
tadalafil biogaran
vardenafil vs tadalafil
https://supertadalafil.com/ - generic cialis tadalafil best buys
viagra prices
otc viagra
https://buygenericviagronline.com/ - natural viagra
generic cialis
https://wowcialisnow.com/ - canadian online pharmacy cialis
generic cialis reviews
tadalafil cialis
https://cialismans.com/ - cheap cialis
tadalafil 20mg
tadalafil 20
https://xtadalafilx.com/ - cheap tadalafil
generic cialis tadalafil best buys
tadalafil liquid
https://supertadalafil.com/ - tadalafil canadian pharmacy
viagra pill
female viagra pills
https://buygenericviagronline.com/ - viagra prices
viagra
https://buygenericviagronline.com/ - viagra side effects
viagra buy
natural viagra
https://doctormedweb.com/ - buy viagra
buy viagra
viagra price
https://webmedicxxx.com/ - viagra vs cialis
buy cialis online reddit
buy cialis online overnight shipping
https://medshopwow.com/ - cialis buy cialis
generic cialis canada
cialis professional
https://shopxpills.com/ - discount cialis
generic viagra
https://buygenericviagronline.com/ - viagra generic
viagra vs cialis
natural viagra
https://doctormedweb.com/ - viagra dosage
viagra pill
viagra vs cialis
https://webmedicxxx.com/ - viagra prices
cialis online
generic cialis
https://medshopwow.com/ - get cialis cheap cialis
buy cialis online safely
buy cialis
https://shopxpills.com/ - cialis 10mg
natural viagra
https://buygenericviagronline.com/ - buy viagra online
viagra generic
100mg viagra
https://doctormedweb.com/ - viagra for sale
viagra prices
viagra price
https://webmedicxxx.com/ - cialis vs viagra
cialis cheap cialis
cialis buy
https://medshopwow.com/ - cialis online pharmacy
buy cialis online
generic cialis reviews
https://shopxpills.com/ - generic cialis online
herbal viagra
https://buygenericviagronline.com/ - 100mg viagra
viagra prices
online viagra
https://doctormedweb.com/ - viagra pills
buy viagra online
viagra dosage
https://webmedicxxx.com/ - generic viagra online
cialis generic name
cialis prices
https://medshopwow.com/ - buy cialis online
cialis 2.5 mg
generic cialis 20mg
https://shopxpills.com/ - buying cialis online safely
viagra prices
https://buygenericviagronline.com/ - viagra pill
otc viagra
female viagra pills
https://doctormedweb.com/ - viagra for sale
cheap viagra
online viagra
https://webmedicxxx.com/ - viagra pills
cialis 20mg
buy cialis online cheap
https://medshopwow.com/ - online cialis
buy cialis online reddit
cialis online pharmacy
https://shopxpills.com/ - cialis cialis online
viagra otc
https://buygenericviagronline.com/ - viagra prices
viagra price
viagra price
https://doctormedweb.com/ - generic viagra online
viagra price
viagra online
https://webmedicxxx.com/ - herbal viagra
cialis cialis online
cialis cialis online
https://medshopwow.com/ - cialis professional
cialis generic name
generic cialis online
https://shopxpills.com/ - generic cialis reviews
generic viagra online
https://buygenericviagronline.com/ - 100mg viagra
viagra pills
viagra for sale
https://doctormedweb.com/ - 100mg viagra
viagra otc
viagra price
https://webmedicxxx.com/ - cialis vs viagra
cialis 20 mg
cialis 20mg
https://medshopwow.com/ - cialis pills
cialis generic
generic cialis 20mg
https://shopxpills.com/ - cialis 5 mg
herbal viagra
https://buygenericviagronline.com/ - viagra buy
viagra
viagra buy
https://doctormedweb.com/ - generic viagra
viagra online
viagra online
https://webmedicxxx.com/ - herbal viagra
cialis cialis online
cialis prescription online
https://medshopwow.com/ - best place to buy cialis online reviews
generic cialis
cialis online reviews
https://shopxpills.com/ - cialis professional
about this topic. You understand a whole lot its almost tough
to argue with you (not that I personally would want to…HaHa).
You certainly put a fresh spikn on a topic that's been discussed for years.
Great stuff, just wonderful!
my website; lose weight supplements best (Anton)
cbd capsules
Discomfort. Stress. Fatigue. They’re just parts of our everyday lives that we must adjust our routines around. Well, not anymore! Thanks to CBD, many are reclaiming their quality of life. In fact, Joy Smith, founder of Joy Organics, is one of those people. Now, Joy wants others to live their best lives with CBD too.
To celebrate two years in business, we’re offering a special deal to our customers. When you buy one product, you'll receive another one for free!
Place an order anytime this week, and you’ll also be automatically be entered to win up to $600 worth of CBD products!
Join the celebration and don’t miss this limited-time offer!
You definitely understand how to bring a problem to light aand make
it important. A lot more people should look at this and understand this side
of the story. I was surprised you're noot more popular given that you definitely have the gift.
my page; wicor review
andd knowledge.
Here is my web-site - woodworking designs pdf (Sabina)
I like what I see so now i'm following you. Look forward to
lookingg into your web page for a second time.
my site street magic secrets revealed levitation photography (Callie)
this website daily because it provides quality contents, thanks
my web-site ... cash blurbs formula review (home.cqdm8.com)
and I used to pay a visit this webpage all the time.
My blog top forex signal providers 2014 - Nikole,
https://iobit-unlocker.down4you.software/
https://typingmaster-typing-test.down4you.software/
https://mozilla-firefox.down4you.software/
https://vlc-media-player.down4you.software/
https://norton-utilities.down4you.software/
https://pocket-tanks.down4you.software/
https://utorrent.down4you.software/
https://mozilla-firefox.down4you.software/
adobe illustrator
custopack tools
https://down4you.software/
https://utorrent-portable.down4you.software/
blog posts. Anyway I'll be subscribing to your feeds
and even I achievement you access consistently rapidly.
Feel free to visit my web-site ... boost your self confidence book (Caroline)
RSS informační kanál komentářů k tomuto článku.