[DeTomaso] NPC Hey Computer (Communication) geeks!

[Rolf Poulsen]

I'm by far no expert. But here is my math.
 
384 kbit/s =  48 kilobyte/s 
1 megabyte = 1024 kilobyte
1024 / 48 = 21.3 sec (without overhead) 
 
With 10 % overhead (which all the danish ISP quotes it at) it would be:
 
23.7 sec
 
 
Rolf,
 

 
> From: detomasoregistry at gmail.com
> To: detomaso at realbig.com
> Date: Thu, 6 Aug 2009 11:29:41 -0700
> Subject: [DeTomaso] NPC Hey Computer (Communication) geeks!
> 
> What is the actual thru-put rate for a 384K link?
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> Example: If I upload a 1 megabyte file, on a 384K upload link, how long will it take in
> seconds?
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> Note that 384K is >kilobits< per second not BYTES per second (I believe).
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> I'm getting lost in "Morning Math".
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> And I don't know the transmission protocol overhead.
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> If the computer/transmission is using a 32 bit byte, (or do ISPs still use 16 bit
> bytes???)
> 
> then a 1 megabyte file is 32 million bits (32,767,000) , or 1 million bytes (1,024 million
> bytes).
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> 32,767,000bits / 384,000 (bit per second) = 85.33 seconds.
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> BUT there is the "overhead" or bits used by the protocol. (I guessed a 50% overhead to
> start with
> 
> since I do not know.)
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> 
> So in reality it would take 85X2 or 170 seconds (approx) to upload a 1 megabyte file.
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> 
> Can someone help me here?
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> 
> Chuck
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