[SPAM] Re: SCP speed question

[Michael Hipp]

Rick Bowers wrote:
> At 1/6/2007 12:08 AM, you wrote:
> 
> 
>> Are you sure you're not seeing between 4 and 11MB/s?  Most measurements of
>> transfer speed are done in BYTES not bits, as the network gear is rated.
>> Approx divide by 10, particularly over wan links (analog: 8 bits data, 1
>> start, 1 stop).  Or if you want to think perfect world switching, /8 is more
>> your cup o' tea.
> 
> Perhaps I'm wrong, but I thought start/stop bits applied only to 
> synch/asynch communications. TCP/IP has no start/stop bits as far as 
> I know. So, don't we (mostly) all divide by 8 these days?

That's why he described it as an "analog". Generally I've found the /10 rule 
of thumb to pretty closely approximate the data thruput you get on a line of a 
given bit speed. Example: 144kbps ISDN line will get you about 14kB/sec of 
download capability, give or take.

Michael