Communication Manager consists of hardware to perform call processing, and the software to make it run. You use the administration interface to let the system know what hardware you have, where it is located, and what you want the software to do with it. You can find out which circuit packs are in the system and which ports are available by entering the command list configuration. All there are variations on this command that display different types of configuration information. Use the help function to experiment, and see which command works for you.