Hello Ruud,
as far as I'm able to read Dutch language, Henk already gave a lot of infos.
Here are some more hints to get the T1000 working with RTTY...
Do you talk about the T1000 machine presented two years ago in this thread:
viewtopic.php?f=207&t=1716
???
Ruud hat geschrieben: ↑Do 10. Jun 2021, 08:53
....., so my question is if your pinout list is for i-telex use or for use with a rtty converter comparator.
This is the wrong question, the pinout has nothing to do with either (i-)Telex or RTTY!
The characters used are the same with both applications (International Telegraph Alphabet No. 2)..
So the right question should be: What kind of interface/technique is needed to connect this specific T1000 with a RTTY-converter??
As you wrote this machine was already used with RTTY and has a 40mA interface, first step is to get the machine to the online-mode. That means to switch it on from outside via the ADoS8-plug by giving a "line current" to pin1 and pin4. (Wire bridges between pin2+3 and pin 5+6 should be established)
Importend:
If you are not sure about the type of interface, at first ensure that NO MODIFICATIONS have been made to the interface assemblies inside the machine. (Radio amateurs like to modify everything !!

)
For this purpose, STT and LAT PCBs have to be extracted and examined, make photos and show us here.
How to extract the PCBs you'll find in the document "T1000_Ausbauanleitung.pdf" on PDF pages 13 to 15, download here:
viewtopic.php?f=102&t=102
And please tell us the complete type numbers of the modules written on both sides of the PCB or make detailed pictures. This helps identifying the kind of interface used in your T1000!
If you are sure about the 40mA-interface, proceed as follows:
Connect a variable voltage power supply (at least 30V) and a resistor (220-470 Ohms, 1Watt) in series to pin 1+4, measure the current by means of a multimeter and increase voltage. Sometime the current should incease, too.
At a level of about 20 -30 mA the machine should turn on...
Now the disconnect button
Schlusstaste.jpg
should light up and you are able to write on the keyboard (50 Baud).
If not, change polarity and try again.
If everything works as described, your RTTY-converter has to deliver 40mA at 30-60V...
If no current comes up with both polarities and the machine doesn't react any way, you may have a tone interface.
Check that by means of a high-Z headphone (1000-4000 Ohms) on pin 1+4 of the ADoS8 plug.
In case of a tone interface a converter from voltage/current of the RTTY equipment to tone is necessary.