Despre vitezele UPC

#2143
654321

Posted 01 February 2010 - 22:05

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Grup: Senior Members
Posts: 4,817
Înscris: 12.03.2007

jovan, on 1st February 2010, 21:17, said:

Pe conexiune de tip UPC/Romtelecom e normal sa ai o latenta mai mare deoarece este o conexiune half duplex, cand se primesc date nu se trimit si cand se trimit nu se primesc

Esti sigur?

Oare de ce exista downstream and upstream channels pe frecvente diferite? :scratchchin:

Edited by 654321, 01 February 2010 - 22:07.

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#2144
jovan

Posted 02 February 2010 - 02:08

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Înscris: 05.05.2005

654321, on 1st February 2010, 22:05, said:

Esti sigur?

Oare de ce exista downstream and upstream channels pe frecvente diferite? :scratchchin:

O frecventa pentru download si una pentru upload nu inseamna neaparat ca treburile se fac simultan.Sincer nu sunt 100% sigur, vino cu dovezi si te cred.

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#2145
654321

Posted 02 February 2010 - 07:35

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Posts: 4,817
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jovan, on 2nd February 2010, 02:08, said:

O frecventa pentru download si una pentru upload nu inseamna neaparat ca treburile se fac simultan.Sincer nu sunt 100% sigur, vino cu dovezi si te cred.

Wikipedia said:

Operation

Currently, most ADSL communication is full-duplex. Full-duplex ADSL communication is usually achieved on a wire pair by either frequency-division duplex (FDD), echo-cancelling duplex (ECD), or time-division duplexing (TDD). FDD uses two separate frequency bands, referred to as the upstream and downstream bands. The upstream band is used for communication from the end user to the telephone central office. The downstream band is used for communicating from the central office to the end user.

http://en.wikipedia....subscriber_line

DOCSIS said:

A set of specifications for high speed, full duplex (FDX) data communications over CATV networks, DOCSIS was developed by the Multimedia Cable Network Systems Partners Ltd. (MCNS), and currently is administered by Cable Television Laboratories (CableLabs) an industry research and development organization.

http://www.yourdicti.../telecom/docsis

Edited by 654321, 02 February 2010 - 07:38.

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#2146
jovan

Posted 02 February 2010 - 11:29

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654321, on 2nd February 2010, 07:35, said:

http://en.wikipedia....subscriber_line

http://www.yourdicti.../telecom/docsis

Multumesc pentru informatii si scuze pentru contradictie.Am mai invatat ceva oricum...

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#2147
batti3004

Posted 27 July 2010 - 21:58

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[ http://www.speedtest.net/result/893918412.png - Pentru incarcare in pagina (embed) Click aici ]

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Anunturi

Chirurgia cranio-cerebrală minim invazivă

Tehnicile minim invazive impun utilizarea unei tehnologii ultramoderne.

Endoscoapele operatorii de diverse tipuri, microscopul operator dedicat, neuronavigația, neuroelectrofiziologia, tehnicile avansate de anestezie, chirurgia cu pacientul treaz reprezintă armamentarium fără de care neurochirurgia prin "gaura cheii" nu ar fi posibilă. Folosind tehnicile de mai sus, tratăm un spectru larg de patologii cranio-cerebrale.

www.neurohope.ro

#2143 654321 Posted 01 February 2010 - 22:05

#2144 jovan Posted 02 February 2010 - 02:08

#2145 654321 Posted 02 February 2010 - 07:35

#2146 jovan Posted 02 February 2010 - 11:29

#2147 batti3004 Posted 27 July 2010 - 21:58