How to call PABX with bloquei DDC (The procedure of a power which is off the DDC is: 1. meet the connection; 2. disconnect the connection; 3. meet again. In a connection charge in the second step of the procedure above, the connection drops, and thus the connection is not made and the number of destination vai not pay for this link.) I am using MFCR2. In an installation made in the arm and I changed recompilava the libmfcr2 editing the file mfcr2.ce changing the value of the line mfcr2-> clear_back_persistence_check from 0 to 3000. It is done in Elastix without having to recompile the libmfcr2?