🚀 go-pugleaf

In article <31408BA2.7EF7@tiac.net> rickkolk <rickkolk@tiac.net> writes:
>Could anyone tell me what Baud rate and bps means?

   Baud rate is the number of symbols transmitted per second, where
a symbol is the unit of transmission.  bps means bits per second.  The
two are not identical.

   In some ancient modems, for example, the two were the same.  For
Bell 103 (North American, up to 300 bps) modulation, two distinct
tones were used to represent bits which were zero or one.  Each
symbol, then, conveys one bit of information, and so the baud and bit
rates for such a modem are the same.

   In more recent modulations, however, each symbol conveys
more than one bit of modulation.  Bell 212A (North American
1200 bps modems) uses phase shift keying in which four states
are possible.  Four states can represent two bits, and the
baud rate of Bell 212A is 600 baud (though it transmits 1200 bps).

   Since then, the number of bits transmitted per symbol has
continued to increase, as has the baud rate.  V.32bis transmits
six bits per symbol, so it achieves a bit rate of 14.4 kbps
using a baud rate of 2400 bps (2400 * 6 = 14 400).  V.34 goes
even farther.

   On a standard serial cable, each bit is represented by
a positive or negative voltage, and the bit rate and baud
rate are the same.

   This topic is not a mail issue; it's a telecom issue, so
I've crossposted into and set followups to
comp.dcom.modems - Data communications hardware and software.
-- 
+------------------------+------------------------------------------------+
| Stephen M. Dunn        |                  postmaster@bokonon.ussinc.com |
| Postmaster of Bokonon  |     (a.k.a. postmast or bokonon_mailer_daemon) |
+------------------------+------------------------------------------------+