For anyone who was wondering, this was the reply I got when I e-mailed the instructor with my question:
You can't telnet into the system with BC9...you must have BC11 and the NIU board.
The NIU will have an IP address assigned to it with a LAN connection, and you can FTP into that and transfer the
disk contents with an FTP command. I use WSFTP LE from IPswitch.com, it's easy (and free).
There are a lot of FTP programs out on the web that make it so much easier than using a DOS window.
So, the short answer is that you can't do it with BC9...better off with a spare HDU and swap them out
occasionaly to keep them updated.
You used to be able to do it with MDDISKTOOL and a special SCSI cable that would dump directly to a
PC, but I don't know if that is still available. Also, PCREGEN can handle something similar..basically,
it sucks all the data off the system with a series of print commands,
and regenerates files that will rebuild the system from ground zero. It is NOT a backup of the system, just the
customer data (routes, phones, etc...) that will recreate your system in the event that you have to reload from
a brand new disk with no backup on it.