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在Mr. Treumann不厌其烦地帮助下，TW39PUUS 终于和T1000联通了！
失败的原因是：
1、主控电路板上的模式默认设置为“点对点”，而应更改为“交换机”模式；
2、通讯接口电路板的模式默认设置为“单流”，而应更改为“单流三态”模式。
附件中我附上了视频和图片。
感谢Mr. Treumann！

Thanks to Mr.Treumann's tireless efforts, TW39PUUS has finally been connected to T1000!
The reason for the failure is:
1、The mode on the master board is set to "point-to-point" by default, but should be changed to "switch" mode.
2、The mode of the communication interface circuit board is set to "single flow" by default, but should be changed to "single flow three-state" mode.
I have attached the video and pictures in the attachment. Thank you, Mr.Treumann!

向大家请教几个问题：
1、TW39PLUS这块板卡有什么用途？
2、这块板卡上的LED灯表示什么（详细说明一下）？
3、这块板卡上的小黑色的按钮怎么用的？
4、它可以联接本地的两台电传机，联机后的两台电传机能通讯吗？如果能，我能认为这块板卡就相当于一台电传交换机（我没有见过电传交换机是什么样子）？
5、如果有许多台机器，能通过TW39本地互相联通吗？
感谢！

I have a few questions for you：
1. What is the purpose of this TW39PLUS board?
2. What does the LED light on this board indicate (please provide a detailed explanation)?
3. How to use the small black button on this board?
4. It can connect two local telex machines. Can the two telex machines communicate after being connected? If so, can I consider this board equivalent to a telex switch (I have never seen a telex switch)?
5.If there are multiple machines, can they communicate with each other locally through TW39?
thanks ！

Mr.Treumann给我回信说：我的视频中机器还有问题（视频中按TW39上的小黑按钮后，T1000就能自动开始打印了。但我的T1000没有自动打印，还要再按一下T1000最左边的“联机键”，才能开始打印！）！搞了这么多天了，马上要发疯了！ 对于刚入门的“小白”，这也太难了！谁能拍个TW39和T1000正确联机的视频吗？多谢了！
Mr. Treumann replied to me, saying that there is still a problem with the machine in my video: after pressing the small black button on the TW39 as shown in the video, the T1000 should start printing automatically. But my T1000 does not start printing automatically; I have to press the 'Online Button' on the far left of the T1000 again to begin printing! After struggling with this for so many days, I'm about to lose my mind! For a beginner 'newbie' like me, this is just too complicated! Who can make a video showing the correct way to connect the TW39 and T1000? Thank you so much!

zmhqh hat geschrieben: ↑So 9. Nov 2025, 08:40 I have a few questions for you：
1. What is the purpose of this TW39PLUS board?
2. What does the LED light on this board indicate (please provide a detailed explanation)?
3. How to use the small black button on this board?
4. It can connect two local telex machines. Can the two telex machines communicate after being connected? If so, can I consider this board equivalent to a telex switch (I have never seen a telex switch)?
5.If there are multiple machines, can they communicate with each other locally through TW39?
thanks ！

Hello Hua,

I'll try to give you a short answer to your questions.
1. The TW39 board connects your teleprinter to the i-Telex system. (i-Telex is a modular system, there are also boards for other connections, e.g. ED1000)
2. The LED lights of each interface indicate different states of the interface. You will find a detailed descrition in the link below.
3. The button of each interface has different functions. (e.g. setup, enable, disable) Please see link below.
4. Your board has two equal interfaces. On each interface you can connect a teleprinter. Yes, if you have connected two teleprinters, they can communicate to each other internally. (without internet)
5. Yes, see 4.

In the following link there is a detailed description of the i-Telex system. Unfortunatelly it's only in German available. Please use a translator. If you have troubles in understanding something, please ask again. Don't worry!

https://wiki.telexforum.de/index.php?ti ... _(i-Telex)

Regarding you issue with the teleprinter I have an idea. I have also a T1000 with TW39 interface. I could not test it on the i-Telex today but I did some tests with a telepringer tester. I could generate some weird behaviour.

I assume, that your teleprinter is connected with wrong polarity. Can you try to change the wires in the terminal A14 / A18 and test again?