I believe I have used this in the past. There is a screenshot on the page which dates is back to 2008. Last update is 2010, so do not expect it to support the newest OTRS features.
The one I used was quite simple. Download and install. Make sure you can connect to the database from the machine that runs OTRS manager. We stopped using it as our old server at the time was not so happy with the additional load. If you have a decent server this should not be a problem.
Arnol.d
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