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doc:appunti:net:adsl

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doc:appunti:net:adsl [2012/05/25 12:09] – [Qualità del segnale] niccolodoc:appunti:net:adsl [2012/05/25 12:12] (current) – [Qualità del segnale] niccolo
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 ===== Qualità del segnale ===== ===== Qualità del segnale =====
  
-Il **SNR Margin in Downstream** (oppure Signal to Noise in DownStream o DS Margin in Downstream, a seconda dell'apparecchio). Se il valore di questa voce è **superiore a 12 dB**, la qualità della portante è buona o quantomeno sufficientemente stabile.+Due sono i parametri fondamentali:
  
-La voce **Line Attenuation in Downstream**: per una buona connessione il valore deve essere **inferiore ai 42dB**.+  - **SNR Margin in Downstream** (oppure Signal to Noise in DownStream o DS Margin in Downstream, a seconda dell'apparecchio). Se il valore di questa voce è **superiore a 12 dB**, la qualità della portante è buona o quantomeno sufficientemente stabile. 
 +  - **Line Attenuation in Downstream**: per una buona connessione il valore deve essere **inferiore ai 42dB**.
  
-Ecco http://www.dslreports.com/faq/6728+Ecco una spiegazione più dettagliata presa da [[http://www.dslreports.com/faq/6728]]:
  
 ^ Relative Capacity Occupation  | Percentage of your overall available bandwidth used to obtain your service ATM rate. For example; if your max line synch rate was 5888Kbps and you were provisioned on a 1472Kbps service you would be using 25% capacity. 1472/5888=25% capacity. The lower the relative capacity the better, but you can still get maximum speeds (although a less stable connection) even with a very high relative capacity. In other words you could be synching at 1472Kbps with 98% relative capacity and achieve maximum speeds, but you may experience more disconnects.  | ^ Relative Capacity Occupation  | Percentage of your overall available bandwidth used to obtain your service ATM rate. For example; if your max line synch rate was 5888Kbps and you were provisioned on a 1472Kbps service you would be using 25% capacity. 1472/5888=25% capacity. The lower the relative capacity the better, but you can still get maximum speeds (although a less stable connection) even with a very high relative capacity. In other words you could be synching at 1472Kbps with 98% relative capacity and achieve maximum speeds, but you may experience more disconnects.  |
doc/appunti/net/adsl.1337940561.txt.gz · Last modified: 2012/05/25 12:09 by niccolo