Mossad,
In the future, please post using only English. This will allow everyone to review, read and respond.
As for your question, R2 is a very difficult and complicated signaling protocol. My recommendation is that if you can move to ISDN, do so quickly and don’t look back.
There must be one or more parameters that need to have a setting that you have not set. You need to check on this.
Mike M
mike_voiP@hotmail.com