Talk:Data Terminal Ready

The system doesn't work
Should have been deleted. --Wtshymanski (talk) 17:00, 28 November 2009 (UTC)


 * I agree. If I'd seen the AFD I'd have said "strong delete". Jeh (talk) 09:14, 24 June 2010 (UTC)

External links modified
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 * Added archive https://web.archive.org/web/20070125091854/http://www.alphamicro.net:80/resources/GPRS_functional_overview.pdf to http://www.alphamicro.net/resources/GPRS_functional_overview.pdf

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Incorrect Interpretation and Reference to RS232 Standard
The statement "According to the RS232 standard" is incorrect and the document referenced in citation #1 is not actually the RS232 standard. I actually have a genuine paper copy of EIA RS-232-C and, regarding DTR, it states (direct quote):

"Circuit CD - Data Terminal Ready (C.C.I.T.T. 108.2)

Direction: To data communication equipment

Signals on this circuit are used to control switching of the data communication equipment to the communication channel. The ON condition prepares the data communication equipment to be connected to the communication channel and maintains the connection established by external means (e.g., manual call origination, manual answering or automatic call origination).

When the station is equipped for automatic answering or received calls and is in the automatic answering mode, connection to the line occurs only in response to a combination of a ringing signal and the ON condition of Circuit CD (Data Terminal Ready): however, the data terminal equipment is normally permitted to present the ON condition on Circuit CD whenever it is ready to transmit or receive data, except as Indicated below.

The OFF condition causes the data communication equipment to be removed from the communication channel following the completion of any 'In process' transmission. See Circuit BA (Transmitted Data). The OFF condition shall not disable the operation of Circuit CE (Ring Indicator).

In switched network applications, when circuit CD is turned OFF, it shall not be turned ON until Circuit CC (Data Set Ready) is turned OFF by the data communication equipment"

The meaning of "communication channel" or "In process transmission" are subject to interpretation. The V.250 standard referenced in the citation describes just one particular application of the RS-232-C standard, not every application.

24.222.21.162 (talk) 19:38, 17 June 2022 (UTC)