Can anyone help me on this? I have a CS1000 5.0. When I left work yesterday everything was fine. When I returned today I was not able to use TTY 1 which is a serial connection into my PC that I used everyday for the past 2 years. I tried my partners PC which has TTY 2 and also a serial connection that always worked to no avail. I moved my serial port to TTY 3 and was able to login so I know its not a serial cable issue. No programming has been changed. Can I reseat the QSDI card without affecting service? Its currently seated in Core 0 which is the inactive core right now. I have heard that messing with TTY ports can sometimes cause the switch to INI. I don't want to drop 3000 users and get fired. Any thoughts?