A configuration file is required for each Asterisk module you wish to use. These .conf
files contain channel definitions, describe internal services, define the locations of other
modules, or relate to the dialplan. You do not need to configure all of them to have a
functioning system, only the ones required for your configuration. Although Asterisk
ships with samples of all of the configuration files, it is possible to start Asterisk without
any of them. This will not provide you with a working system, but it clearly demonstrates
the modularity of the platform.