[comp.sys.mac.hardware] BPS, Baud, & Standards

george@swbatl.UUCP (6544) (02/18/90)

Apparently I caused some confusion when I stated that a 2400 bps
modem was operating at 1200 baud.  Modems common in North America
use the V.22bis standard which runs at 600 baud.  The modem I was
thinking of used the V.26tir standard which runs at 1200 baud.
V.26tir is a worldwide standard (as is V.22bis), but it doesn't 
seem to be real common.

Anyway, I thought some of you might be interested in just how
many "standards" there are.  Here's some data from the January '90
issue of MacUser.  It came from an article about 9600 bau...WHOOPS!
I mean 9600 bps modems.

Enjoy!

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Telecommunications Standards
(taken from January '90 MacUser page 204)

Standard        BPS     Baud    Duplex  Where Used
--------------------------------------------------------------
Bell 202        1200     600    Half    North America
Bell 201        2400    1200    Half    North America
Bell 103         300     300    Full    *North America
V.21             300     300    Full    Outside North America
V.23            1200     600    Half    Outside North America
Bell 212A       1200     600    Full    *North America
V.29            9600    2400    Half    Worldwide
V.22            1200     600    Full    Outside North America
V.22bis         2400     600    Full    *Worldwide
V.26ter         2400    1200    Full    Worldwide
V.32            9600    2400    Full    *Worldwide  

* Commonly used in North America 


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