This is the length of time in seconds CDRouter will wait for a TransferComplete! event when the USP agent is downloading a firmware image. In most cases the default value of 5 minutes should be sufficiently long, but if the firmware image is large this value may need to be increased.
Note this testvar is also used as the time in seconds the USP agent takes to install a new firmware image and boot after the image has been downloaded.
This testvar was added in CDRouter 13.7