On 25 Oct 2000, at 12:21, Ben A L Jemmett wrote:
> Up to 9600bps, the bps speed is equal to the baud rate. Above 9600bps, the
> baud rate is 9600. So my 2400baud modem will always have the same baud rate
> as bps speed, while a 14.4kbps device connecting at 110bps (yes, I've seen
> that - phone line here sucks rocks) is running at 110baud too.
Ummmm,
V.22bis is 2400bps. But it's 600 baud, using QAM encoding for 4
bits/baud.
V.32 is 9600bps. Its 2400 baud, and also uses QAM for the 4
bits/baud.
The faster ones don't go above 2400 baud, just uses better
techniques to get more bits/baud.
I hope it's clear that a baud is a change in the signal?
For the RS-232 link back to your computer bps==baud always, up
to the 115200 limit of RS-232C. (But the bps of this serial link
should be higher than the bps of the modem (analogue) link. My
modem usually says:
CONNECT 115200
CARRIER 33600
etc)
Reference is my Computer Engineering III textbook, which can
basically be found:
http://www.usq.edu.au/users/leis/units/70835/module4.pdf
HTH :-)
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