Talk:Asynchronous serial communication

message: Why was this put in? 
:To limit cable costs, all telecommunication  equipment employs multiplexing. For example  Morse code employs a series of dots and dashes to represent a character. Dots are short pulses of electrical current compared to the longer dash pulses.  Thus, short and long pulses are  multiplexed  on  the  same wire (circuit) over time.  In modern telecommunications, pulses are usually the same duration and a group of pulses are sent together to represent one character code.  A pulse can only be in one of two states but there  are  many  names for the two states.
:When on, circuit closed, low voltage, current flowing, or a logical zero,  the pulse is said to be in the "space" condition.
When off, circuit open, high voltage, current stopped, or a  logical  one, the pulse is said to be in the "mark" condition. A character
code begins with the data communication circuit in the  space condition. If the mark condition appears, a logical one is recorded otherwise a logical zero.
This is a general discussion of electrical signalling and not really the point of this article.
--Wtshymanski 17:45, 24 August 2007 (UTC)
thread_title: Stray paragraph

message: Under the example communication diagram there is description:
"In the diagram, a start bit is sent, followed by seven data bits, a parity bit and one "stop bit", for a 10-bit character frame."
However, it seems to be more like 8 bit data and no parity bit (or for some reason parity bit is included - incorrectly? - in the data bits group and not described as such).
I do not feel sure enough to make the change, so I leave a note here for someone educated in the subject.  —Preceding unsigned comment added by 88.199.35.124 (talk) 23:16, 25 February 2010 (UTC)
replies: text: The diagram did seem to be inconsistent with the text there, so I changed the text accordingly.  Parity is optional, and even, odd, and no parity were all used. --John Nagle (talk) 05:03, 29 May 2011 (UTC)
thread_title:  Error in the diagram description? 

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thread_title:  External links modified 

message: The "Operation" section of the article says that "The speed or bits per second of the line (often [is] incorrectly referred to as the Baud rate)."
Is it incorrect? That depends on what "correct" means. In the nomenclature of information theory, "baud" has come to mean the number of symbols transmitted per second. But in async-serial communication, as defined by this article, only two symbols are ever used; mark and space. Technically speaking, "Baud rate" and "bit rate" are two different concepts, but in the special case of async serial communication the numeric value of the baud rate and the bit rate will always be the same.
173.75.33.51 (talk) 02:01, 24 July 2019 (UTC)
thread_title:  Incorrectly referred to as Baud