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Description:
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dlDownloadKey OBJECT-TYPE
SYNTAX DisplayString
ACCESS read-write
STATUS mandatory
DESCRIPTION
"This string is used as a security key to enable downloads.
Unless this string is correctly set, the transponder will not
permit a download sequence to commence. This string is useful
for downloading to multiple transponders via broadcast or
multicast addressing.
The dlDownloadKey must begin with the dlDeviceKey string of the
active firmware image for the device specified by dlDownloadDevice
if a download is to be permitted. The dlDeviceKey value can also
be obtained from the DEVICE-KEY parameter in the distribution file
header. The dlDeviceKey value is embedded in the running firmware,
which permits the security check to be made. It is expected that
all firmware images for one device will have the same dlDeviceKey.
The value written to dlDownloadKey may have the version string of
the new firmware appended to dlDeviceKey. The key will only
permit the download if the version of the download firmware is
newer than that of the firmware being replaced. If the version
string is not present, then the version check is not made.
As inclusion of the version string in dlDownloadKey is optional,
this should not be relied upon as the means by which the version
string is transferred to the device.
This value for this object reverts back to a zero length
string after the end of any download or download error.
The value of this object should only be changed when
dlDownloadStatus is done(6). Attempts to change the object
during any other state results in termination of the download
in progress and an error being recorded. The actions associated
with detecting an error are described by Note 4 of the download
state diagram presented earlier in the document. The object
value will not be cleared and the new value shall be accepted.
The default value is a 0 length string. This object is volatile."
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