[GreenKeys] [Bulk] Re: i-Telex, revisited...

[Henning Treumann]

Jeff,

we are working on a modification of our software (firmware)
to connect also 60WPM machines without the TW39 dialler unit.
The (for our network needed) answerback is emulated by software
on the board.
But this makes it necessary to switch (auto start) the motor somehow
when a call comes in.
If a machines has such an idle line timer installed, as all my USTTY
machines have surprisingly, the modification can be done only by software.
For machines without such a timer there will be also need of a hardware
modification to switch the motor with a relay.

But anyway, an original Telex machine is still first choice in operation.

Die "dual mode" board as you call it emulates a teleprinter at one port
of the board.
You can operate it with a terminal software at the serial port. But is
stand alone
and receives and stores also messages without any computer/terminal
connected.


Henning DF3OE
i-Telex: 92612

2016-02-02 10:43 GMT+01:00 Jeffrey D Angus <jdangus at att.net>:

> On 2/2/2016 3:26 AM, Henning Treumann wrote:
>
>> Yes, this is exactly how the TW39 Telex signalling operates.
>>
> *grins*
> See, I have been paying attention. ;-)
>
>> At least the TELEX network was working original TW39.
>> As I recall TWX was ASCII with model 33s, wasn't it?
>>
> It was a lot of things.
> TWX had been around since the '30s, so I'm sure they were using
> Model 15s, 19s, 28s, 32s in the "three row" system (Baudot) and
> later started using the 33s and such in the "four row" (ASCII) mode.
> <https://en.wikipedia.org/wiki/Telex#Teletypewriter_eXchange>
>
> But the point I was trying to make, is I think the TW39 interface on
> the i-Telex board is set up to do exactly what the Lorenz Dialer is
> expecting. NOT what American/Western Union/TWX dial control
> units are expecting to see from the "central office."
>
> And this is why you have the "dual mode" board with both TW39
> and a serial loop connection.
>
>
> --
> Jeff-1.0
> wa6fwi
> http://www.foxsmercantile.com
>
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