We went to take over a large site with a G3 on it, had engineers code changed by losing company connected up the laptop, and it wouldn't connect. in the g3 panel there is no pace to program the downloader ID or system ID so unless you know them you are not connecting to the panel unless you crash it and reprogram it.
When we install a new system them site is then sent to our server which generates a system ID and puts our downloader ID in to the panel, then if we take a laptop to that site the only way to connect to it is to export the file from our server and import it on our laptop.
Might of missed something but where on a G3 can you programe the downloader ID ?