This object is used to initiate file transfer between this unit and the file server identified by tftpFileServerIpAddress. A download indicates that the file transfer is from the file server (down) to the device. An upload indicates a file transfer from the device (up) to the server. This object can be used to initiate either image or parameter file downloads and a parameter file upload. There is no image file upload feature. An image file can be downloaded via either a BootP request (where the image filename and the BootP server's IP Address is unknown) or via a TFTP request where the user has configured the tftpFileName object with the path and name of the file. BootP cannot be used to download or upload a parameter file. An attempt to set this object to one of the following values: startTFTPImageDownload, startTFTPParameterDownload or startTFTPParameterUpload, will fail if either the tftpFileName or tftpFileServerIpAddress object has not bee configured. The tftpFileName and tftpFileServerIpAddress objects are ignored for BootP requests. A value of noAction is always returned to a GetRequest. Seting this object with a value of noAction has no effect. The startPrimaryImageTFTPDownload is used to initiate the download of the primary boot image. This image is only downloaded when there is a new revision of the basic boot mechanism or changes to the flash or CMOS sub-systems.