4. Configuration3150-A2-GB24-10 March 2001 4-3Changing Configuration OptionsThe CSU is an intelligent device that displays only valid options for the currentconfiguration. Therefore, you are only presented with menu choices that areconsistent with the current configuration and operational state of the CSU; invalidcombinations of configuration options do not appear. Be aware that although alloptions are shown in this guide, what you see on your CSU varies with yourconfiguration.The CSU offers configuration options located in the following memory areas: Active (Activ). This is the configuration option set currently active for theCSU. Before a configuration option set becomes active for the CSU, you mustsave the set to the Active area. When the CSU is shipped from the factory, theActive configuration option set is identical to the Factory set. This area can bewritten to and controls the current operation of the device. Customer 1 (Cust1). This is the first of two sets of customer-definedconfiguration options. This area can be written to. Customer 2 (Cust2). This is the second of two sets of customer-definedconfiguration options. This area can be written to. Factory 1 (Fact1). This is a set of configuration options preset at the factory.This set is determined by what is considered to be the most commonconfiguration used in the CSU market. Factory 1 options are read-only. Factory 2 (Fact2). This is a set of configuration options preset at the factory.This set is determined by what is considered to be the second most commonconfiguration used in the CSU market. Factory 2 options are read-only.The configuration options are divided into functional groups. Appendix C,Configuration Options, contains a list of the configuration options and defaults.These groups are:DTE Interface Configuration OptionsNetwork Interface Configuration OptionsGeneral Configuration OptionsUser Interface Configuration OptionsAlarm Configuration OptionsManagement Configuration Options