OK, i will try again without MAX using inverted mode. How to set it in HSerout command?
I am sure about the RX TX connection, besides, with the pc communication there are no problems.
And i will try also numeric mode (atv0, if i am corect?)

Well, it would be easy to give up on it, but it looks like nobody tried yet with Siemens. And anyways i like doing this things, so i will keep on going untill its working anyhow, and than i will try to get it working with original cable (sometimes i am an optimist )

Thanx for your help, Ioannis, i appreciate it.


P.S. I have a feeling, that this must be some stupid little ditail which is missing. As allways, so..