Train timetable site for whole Thailand

Hello everyone,
I am searching for Train timetable site / list when and from where trains are comming.
From place A to B.
Most important for me is when/how to move from BKK to Laos border.
From Cambodga border to BKK.
And maybe from Pattaya to Laos border.

Thank you.

Take a look here.  There are many other sites, just Google.

Thailand Trains

Here is a link to an individuals website that was very helpful to my travels within Thailand:

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