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Thread ID: 35609 2003-07-17 03:27:00 Download speed Chris Randal (521) Press F1
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160487 2003-07-17 03:27:00 Is 4.1kb/s a good download speed on a 56k modem?

How is download speed related to the modem speed, arithmetically I mean?

Chris
Chris Randal (521)
160488 2003-07-17 03:36:00 The modem speed is kilobits per second (56 kb/s) (little b)
The download speed is kiloBytes per second (4.1 kB/s) (big B)
There are 8 bits to a Byte

In addition, there are extra bits needed for error correction
Some files are able to be compressed which theoretically gives a slightly higher throughput.

In short, 4.1 kB/s is quite acceptable and normal. Some get slightly higher, many get lower. You seldom get connections right up to 56k, and even if you do the modem probably trains lower when handling the data.

The arithmetic is divide by 8, but then you need to adjust that for error correction etc, more like divide by 10+

Compression can offset this a bit.

Jetstream Starter (128kb/s) gives me a consistent 16 kB/s download, exactly one eighth.
godfather (25)
160489 2003-07-17 03:39:00 thats not bad. depends a bit on what you where downloading and how you took that reading.

theres 8 bits in a bite so in theroy a 56kb/s modem will run at max of 7kB/s. however after you take the overhead etc into acc you end up with a max of 5.6KB/s (not including compression).
tweak'e (174)
160490 2003-07-17 04:17:00 It is what the download screen for AVG says is the speed.

Thanks for your help guys.

Chris
Chris Randal (521)
160491 2003-07-17 04:55:00 I use Naviscope (www.naviscope.com) and you can see the download speed in bytes overall on your connection KiwiTT (4082)
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