[ILUG] Connection speeds??

[Dave Burke]

I could be wrong on this, but isn't the 56kps that your modem is rated at,
56 kilo BITS per second, ie 56000 BITS per second. So to translate this
into BYTES per second (which is what your program reports downloads at),
we must divide by 8 so a 56000 kilo BIT per second connection is equiv to
7 kilo BYTES per second......but obviously thats a theoretical max.

The mean connection for a v.90 modem is about 44 kilo bits per second,
which when translated to bytes is 5.5 kilo bytes per second.
Now thats your full bandwidth, you must cater for the TCP/IP over head
that is required when transfering files (of which I have no idea, I just
know it exists, refer to some posting the Nick Hilliard made 2 years ago
on some iol.* newsgroup) and then factor in congestion and you end up with
your 4 kilo bytes per second.

Does this make sense? I think it's right, but someone may well tell me I'm
talking crap............time for caffine methinks..........

Dave


On Thu, 2 Mar 2000, Dermot Gorman allegedly said:

> Hi,
> I just want to compare my connection speeds with others on the list.
> I'm using a bog standard 56K modem and connecting at home over a 
> standard telephone line. The modem is set to connect at 115200 (whatever 
> that means) and I'm seeing typical download speeds (using eircom.net) of
> 4K - is this normal, I know i can't expect to see the full 56Kbps but
> surely 
> it should be more than 4Kbps. Have I set something up incorrectly or is
> this 
> typical of an evening time connection????
> 
> Dermot
> 
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