All, I am very new to pbx hardware and equipment and any help will be greatly appreciated. I am now the proud owner of a TDM422p and Iaxy/S100I. The server is running debian testing so I first installed the asterisk deb package. To get the zap modules, I compiled zaptel-1.0-RC2. After some configuration, everything worked as expected. Then the server crashed -- locked up hard. Nothing in the logs, completely frozen. This is a server that typically runs months on end with no problems. After repeated crashes, I tried different slots in the computer to put the TDM422p on different IRQ settings. I also upgraded to asterisk-1.0-RC2 (compiled from source). Still had lockups, but I couldn't get the board on its own irq. So I moved it to another machine where it could have its own irq. Now that machine locks up. The lockups always occur within 1-4 hours. When running, the pbx works just as intended, but the crashes are making the system unusable. I am pulling my hair out with this problem and my SO wants me to give up the project. Any and all help will be greatly appreciated! Thanks, David