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The time now is 01.11.2024 - 01:31


1 Gbps spoj

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marekh
Post subject: 1 Gbps spoj  PostPosted: 13.10.2013 - 13:35 #104686
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Joined: Dec 14, 2008
Posts: 87

Poradite na aku maximalnu vzdialenost a v akom pasme existuje 1 Gbps spoj ?
 
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midnight_man
Post subject: RE: 1 Gbps spoj  PostPosted: 13.10.2013 - 13:39 #104687
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Joined: Feb 14, 2011
Posts: 2544

80Ghz

siklu? alcoma? Vzdialenost? 60cm antena tak 2 km + -. Zalezi na tom aku dostupnost to ma mat.
 
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marekh
Post subject: RE: 1 Gbps spoj  PostPosted: 13.10.2013 - 13:45 #104688
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Joined: Dec 14, 2008
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To mi je jasne ja som skor myslel nieco na vacsie vzdialenosti v licencovanom pasme
 
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midnight_man
Post subject: RE: 1 Gbps spoj  PostPosted: 13.10.2013 - 15:16 #104689
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Joined: Feb 14, 2011
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ceragon ma 2048 QAM so 4xMIMO v lic pasmach ale ta cena bude nehorazna. Nezabudat na to, že cena licencie ide rapidne hore s plateným vykonom.
 
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421
Post subject: RE: 1 Gbps spoj  PostPosted: 16.10.2013 - 04:16 #104697
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Joined: Jún 12, 2005
Posts: 2739
Location: zilina
U ceragonu existuje QAM256 s tzv XPIC funkciou kde na dvoch Vonkajsich jednotkach a jednej vnutornej prevadzkujes v H+V polarizacii az 900Mbps. Vacsina tzv fullodu radii toto nevie, treba na to klasiku cize radio s vnutornou a vonkajsou jednotkou. Dobre to ma vyriesene aj SAF ale bohuzial v tej drahsej serii.
 
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Thomas
Post subject: RE: 1 Gbps spoj  PostPosted: 16.10.2013 - 09:42 #104699
Majster


Joined: Okt 31, 2006
Posts: 2062
Location: TT
421 ale pri akom kanále ? 80 HMz , moc pásiem s takým kanálom na výber nemáš. Navyše 2+0 konfoguráciu už tý lepší výrobcovia zvládajú v jednej vonkajšej škatule s modulaciami do 1024-2048 QAM
 
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kotol
Post subject: RE: 1 Gbps spoj  PostPosted: 16.10.2013 - 10:20 #104700
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Joined: Júl 14, 2005
Posts: 1591

zevraj 28 Mhz Wink priepustnost 1Gb

podla brozurky
 
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marekh
Post subject: RE: 1 Gbps spoj  PostPosted: 16.10.2013 - 10:43 #104701
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Joined: Dec 14, 2008
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Alcoma mi uz poslala ponuku, Kde mi spravia najlepsiu ponuku na ceragon ?
 
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421
Post subject: RE: 1 Gbps spoj  PostPosted: 16.10.2013 - 12:38 #104707
Majster


Joined: Jún 12, 2005
Posts: 2739
Location: zilina
Thomas neblazni to co je za otazka?! u nas su predsa povolene sirky pasma : 7,14,28,40 a 56Mhz. Tak ako sa vobec mozes opytat ze ci je to pri sirke pasma 80MHz. Bavime sa o klasickom licencovanom radii. XPIC je technologia / pri Ceragone / ktora ti dovoluje vyuzivat pasmo 2x a to v obidvoch polarizaciach. Cize ked si kupis 28Mhz kanal mas priepustnost danu modulaciou a ak mas skoordinovane pasmo pre XPIC tak mas kapacitu dvojnasobnu v tej sirke kanala. To je vsetko.
 
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Thomas
Post subject: RE: 1 Gbps spoj  PostPosted: 16.10.2013 - 13:33 #104710
Majster


Joined: Okt 31, 2006
Posts: 2062
Location: TT
Ale ty si spomínal 900Mbit pri 256QAM , tak sa pýtam pri akej šírke kanála , lebo ked si zoberem 256QAM 56 MHz + Xpic tak to vychádza cca 770 Mbit čo má ďaleko od tebou spomínaných 900 Mbit . Takže aby si sa priblížil k tým 900 Mbit potrebuješ 80 MHz pásma v slovenských podmienkach dva susedné 40 MHz kanály . No a koľko pásiem máme kanálovaných po 40 Mhz ?
 
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midnight_man
Post subject: RE: 1 Gbps spoj  PostPosted: 16.10.2013 - 14:13 #104711
Majster


Joined: Feb 14, 2011
Posts: 2544

Nechcem vidiet tu cenu licencie pri takom kanale a vacsom vykone.
 
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kotol
Post subject: RE: 1 Gbps spoj  PostPosted: 16.10.2013 - 15:18 #104712
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Joined: Júl 14, 2005
Posts: 1591

ako pise 421 ceragon bezi na Xpic + MIMO cize vyuziva jeden kanal 4x

+ modulacia 2048 QAM

ale na dlhe skoty to urcite neudrzi max modulaciu...


ceragon ti vie nacenit ARPA.sk

zdar
 
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421
Post subject: RE: 1 Gbps spoj  PostPosted: 17.10.2013 - 11:59 #104726
Majster


Joined: Jún 12, 2005
Posts: 2739
Location: zilina
ak ceragon tak by som skor doporucoval korex zo ziliny, inak velmi dobre to ma vyriesene aj dragonwave predava ich Ha-vel a kedze ide o cesku firmu mozete nakupit tovat bez DPH ak ste platca....
 
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feede
Post subject: RE: 1 Gbps spoj  PostPosted: 05.12.2013 - 21:42 #105276
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Joined: Nov 09, 2012
Posts: 4

dear all, co hovorite na vzdialenost 75km vs 1Gbs na jeden hop ? Pripadne o akych najdlhsich prepojoch viete pri tejto kapacite / aky hw ? Ma niekto skusenost s niecim takymto alebo si skor myslite ze je to nezmysel ? Diky za odpovede.
 
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alwarez
Post subject: RE: 1 Gbps spoj  PostPosted: 06.12.2013 - 08:10 #105279
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Joined: Máj 22, 2005
Posts: 477
Location: Michalovce
75 km na jeden hop nieje problem, potrebujes na to len 75 km kabla
 
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