QIC-PC II Connection Issues

If you encounter these QIC-PC II errors, take the appropriate corrective action:

Connection timed out QIC-PC II could not establish a connection to the server
  Causes Cannot establish communication to the server
  Corrective action Verify that your PC is connected and communicating with the network.
Connection reset by peer Connection refused.
  Causes A communication error occurred
  Corrective action Verify that your PC is still connected and communicating with the network because your network went down.
Requested terminal device unavailable Requested session is unavailable
  Causes You have exceeded your number of terminals
  Corrective action You are logged in somewhere else.  Close those open terminals first.