3. Operation3-14 February 2001 3160-A2-GB21-90If you chose a port, the Portn LEDs screen lists the LED signals, two at a time,on the second line. A vertical bar at the left of the LED name indicates thecondition is ON, while an underscore indicates the condition is Off.5. Use the and keys to scroll LED names onto the screen.Changing Configuration OptionsThe DSU/CSU is an intelligent device that displays only valid options for thecurrent configuration. Therefore, you are only presented with menu choices thatare consistent with the current configuration and operational state of theDSU/CSU; invalid combinations of configuration options do not appear. Forexample, menus displayed for the Model 3160 (2 ports) and the Model 3164(4 ports) differ due to the number of ports available. Also, if the DTE Drop/Insert(DSX-1) interface selection is disabled, many of the menu choices do not appear.Be aware that although all options are shown in this guide, what you see on yourDSU/CSU varies with your configuration.The DSU/CSU offers configuration options located in the following memory areas: Active (Activ) – This is the configuration option set currently active for theDSU/CSU. Before a configuration option set becomes active for the DSU/CSU,you must save the set to the Active area. When the DSU/CSU is shipped fromthe factory, the Active configuration option set is identical to the Factory set.This area can be written 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 DSU/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 DSU/CSU market. Factory 2 options are read-only.F1 F2 F3Portn LEDs:_DTR _TXD
