If the 6000 needs a straight-through cable to connect to a computer, then it is logical that to connect two receivers, you'd need a crossover cable.
Think about the pin wiring, and it's pretty clear.
The cable supplied is the one 98% of the people would use.
I've read that some receivers can do box-to-box transfers, but since I never had two of the same kind, I've always read that as "copy the firmware" from one box to the other.
IF they can transfer settings too, that could be very useful where you have two, and want to move blind scan info to another box.
The traditional way would be to scan, then hook that box to your computer, save all the satellite settings, have the
ability to edit them on your computer, and then write the settings you have backed up to any receiver you like.
The two significant features are that you have a backup, and you can edit on your computer.
Both are very handy! -
PS: and we know why any such feature exists.
So, imagine how a hacker would best use it.
I can see moving the firmware would be very handy.
But moving the setup might be, too.
I won't go into how a dealer might visit an end users house and update him, but will leave that to your imagination.
. . . and he wouldn't even need to carry a laptop . . .