If allowed to exit, some CAT units may try to port across a street. Fatal errors may happen. Your CAT should have a system name. The name may need to be reinitialized repeatedly until the system can read it correctly. This lets you issue voice commands to bring the unit to an online state.
Many owners give their CATs a secret password as well.
You can also get the CAT's attention by booting the system. While this is effective, it is discouraged. Too much booting will abuse the system. Such units will sit across the room with its back to you. This is pre-installed.