The gtUpdateControl controls the module update process. The gtUpdateControl can be set to the following values: downloadFirmware(1) - download the firmware, entitlement or private key file given by gtFirmwareFilename from the SFTP server. There can be only one firmware per module type stored at a time, only one entitlement file per module and only one single private key. If you download a new firmware file for a type that already exists on the rack unit, the old firmware is deleted. Firmware file names must start with the module type, e.g., 'GT11_firmware_vXX.bin' or 'gt22-firmware.bin'. Entitlement files must have a file name of 'xxxxxxxxxxxxxxxx.ent', where xxxxxxxxxxxxxxxx is the serial number of the target module, as a 16 digit hexadecimal number. Private key file names must end in '.ppk'. updateModules(2) - update all modules in the chassis with the firmware previously downloaded, corresponding to their module types. updateSwitch(3) - update the GT11 with the firmware downloaded previously. deleteAllFirmwareFiles(4) - delete all previously stored firmware and entitlement files. deletePrivateKey(5) - delete the stored private key. updateEntitlements(6) - update all modules and the GT11 using the entitlement files with their respective IDs that were previously downloaded.