32 CHAPTER 2: D IAL P LANNBX System Database The NBX system database contains a default dial plan that is initiallyloaded at the factory and is reloaded if you purge the database.■ NBX V3000 system — default 4-digit plan■ SuperStack 3 NBX system — default 4-digit plan■ NBX 100 — default 3-digit planChanges that you make to any system settings, including changes madeby importing a modified dial plan configuration file, are stored in thedatabase. When you reboot the system, it loads the database with anychanges that you have made. The NBX system database includes all ofthe settings necessary for system operation.NBX System Dial Plan You can import a dial plan configuration file to provide the system with aset of operating instructions for managing the telephone system.Alternatively, if you have made changes to the currently loadedinstructions through the NBX NetSet utility, you can export the dial planconfiguration file to save it. You can also make changes by editing theconfiguration file off-system, using any ASCII editor, and then importingthe modified file. You can easily reuse a given configuration file on manysystems. For more information, see “Importing and Exporting Dial PlanConfiguration Files” on page 47.The system is shipped with several default dial plan configuration files,typically, a 3-digit and a 4-digit file for each country that is supported.In addition, the file samples.txt contains several examples that illustratehow you can configure the dial plan configuration file to control how thesystem manages incoming and outgoing calls.Normally, you completely configure a dial plan before you start to use thesystem to control the telephones. Although you can make changes later,major changes in the dial plan can disrupt the system.Decide whether you want to use a 3-digit or 4-digit dial plan before youcreate the dial plan, autodiscover, or manually add telephones or otherdevices to the NBX system.When you import a dial plan, some parameters of the system changeimmediately. Others change only when you reboot the NBX system.3Com recommends that you reboot the NBX system each time that youchange the dial plan.
