From: Bruce Lane
Subject: Re: telex interface
Date: Thu, 28 Nov 2002 23:31:32 -0800
Organization: Blue Feather Technologies
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In article ,
> On 28 Nov 2002 04:40:03 -0800, the renowned BGH_Behnam@yahoo.com
> (Behnam Ghiaseddin) wrote:
> >hi all
> >I want to build a circuit which can send and recieve telex
You're joking, right?
> Telex?! You want to send data to a '43 printer or something?
> IIRC (and subject to bad memory), it's something like 20mA
> current loop at 110 baud. Maybe someone else remembers.
Actually, that's TWX, Telex's successor (handy that I spent about
three years with Western Union's old field service division). Original
Telex service is 50 baud, using 5-level Baudot code, with either a 60mA
or 20mA current loop interface depending on the machine type.
As far as I know, Telex is all but extinct. There may be some few
remote areas where it's still in use, but the advent of the Internet and
cheap long distance has pretty much killed it.
Oh, FWIW: It's really doubtful you could get a modern PC to do that
sort of thing without some external hardware.
Bruce Lane, Owner and Head Hardware Heavy,
Blue Feather Technologies -- http://www.bluefeathertech.com
Amateur Radio: KC7GR (Formerly WD6EOS) since 12-77.
kyrrin (a/t) bluefeathertech dot-com (Reassemble to use)
"I'll get a life when someone demonstrates to me it would be superior to
what I have now..." (Taki Kogoma)