HI Thanks for your answer. I was check again and I confirm that is else problem than I referring in my first message. I was talk with my teleco and hi tell me that in my ss7 CGB is missing parameter of range blocking only hi get range 32 , When i send CGB , that I should send 3 parameters (1 cic, range and mask). But what I understand on his side only get always message to all 32 channels newer mind what range I send . Central of my teleco it's simply ignore my CGB from this reason. If he send me CGB that working fine. Answer for you last question: We do interconnect testing now. Have you any suggestions ?? Best Regards Grzegorz Maciak -- Regards IT Manager of Conino L.T.D phone:224937014,224937007 ICQ number: 619538873 email: gm at conino.com.pl