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Date:      Sun, 18 Jul 2004 16:58:44 +0200
From:      Marc Fonvieille <blackend@freebsd.org>
To:        Warren Block <wblock@wonkity.com>
Cc:        freebsd-doc@freebsd.org
Subject:   Re: docs/69225: PATCH-Serial comms chapter has wrong acronym for Transmit Data
Message-ID:  <20040718145844.GE84500@abigail.blackend.org>
In-Reply-To: <20040718071535.V20959@wonkity.com>
References:  <200407181300.i6ID0QXA032696@freefall.freebsd.org> <20040718071535.V20959@wonkity.com>

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On Sun, Jul 18, 2004 at 07:28:56AM -0600, Warren Block wrote:
> >
> >I'd change SD for TD which is the correct term in our case (or TxD, but
> >in this case RD must be changed for RxD).  TD is the data transmitted by
> >the DTE (our computer) to the DCE (modem), RD is data to DTE from DCE.
> >These descriptions come from a time where half duplex was common.
> >s/Transmitted/Transmit/ etc. is not mandatory, in fact both versions are
> >used.
> 
> You're right, but I'd never seen the "Transmitted" form until a web 
> search this morning.
>

I just read ITU-T V.24 recommendation (which is identical to RS232 for
signal description and names), they use Transmitted and Received data.

> >So I'd keep the description but I'd s/SD/TD which is correct.
> 
> Now that I look at it more, TxD/RxD are used earlier in the chapter, and 
> are the more correct way to go.  I think these are probably how they are 
> listed in the EIA spec.
> 
[...]

I don't know for TxD/RxD, I don't have access to any recommendation
stating it's TxD not TD.

Marc



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