Operation for the file type to be transferred between the IDU and the external server. The options with prefix 'download' are files to be transferred from the server to the IDU. The options with prefix 'upload' are files to be transferred from the IDU to the server. To download IDU certificate, the OIDs genEquipSecurityCfgSecurityFileName, genEquipSecurityCfgSecurityFileFormat and genEquipSecurityCfgSecurityFileType should be set prior the operation of download security file. To upload CSR file, the OID genEquipSecurityCfgSecurityFileName should be set prior the operation of upload CSR file. To download CLI string, the OID genEquipMngCfgCliScriptFileName should be set prior the operation of download cli-script. To download warning banner file, the OID genEquipSecurityCfgWarningBannerFName should be set prior the operation of download warning-banner.