SAMSUNG InstallationDCS-816 February, 19994-34.2 Monitor LED Indication and Memory Backup SelectionAfter verifying proper operation of the power supply, turn your system ON to check the operationof the monitor LED on the base board. The LED should flicker rapidly indicating the mainprocessor is functioning.Now move the Memory Backup Selector to the ON position (Figure 2-5). Failure to do so mayresult in a loss of programming data and customer data in the event of a power failure.4.3 PCB VerificationBefore connecting all MDF cabling, plug in a test cable to the Champ connector on the base board(Figure 2-3). Connect a display set and verify that it is working.Use maintenance program MMC 727 (System Version Display) to verify the system version andsoftware version and to confirm the status of installed cards. Otherwise, please contact yourdealer for advice.Remove the test cable and plug in an amphenol-type cable and an RJ-45 cable to the MDF.Proceed with the rest of the installation.4.4 Default Trunk and Station NumberingAt the beginning of system operation the CPU reads the expansion slot and the option connectionsfor the presence of a card and identifies the type. It stores this as the default configuration.The system assigns trunk numbers beginning with 701. Station numbers begins with 201. Thekeyset connected to the lowest port is assigned to the operator by default and all incoming trunkcalls ring the station until the default data is changed by programming.Station and trunk numbers can be changed, rearranged and reassigned as needed using programMMC 724 (Dial Numbering Plan).