Digium ISDN cardsWith the digium ISDN cards the tracing is different than the tracing at the Sirrix cards. You have to connect via SSH to the linux console of your T300/500 and connect to the asterisk system. asterisk -rvvv To check the available spans, enter following command: pri show spans To start now a debug session enter following command: pri debug span xx Where xx is the number from the the previous 'show spans'-command. when you have analyzed the session, you can deactivate the debug again: pri no debug span xx |