You can get information about the ports and cards at any time by telneting into the Adtran. Go down to modules and then you can go into the menu for each card.

There's tons of good stuff, but here's just a couple of the more useful ones. This screen shows which channels are in use on an Octal BRI card. Obviously, the first and second column are the two bearer channels, and the third is the D channel. Each A represents and "Analog" call or modem session.

This one shows which channels are in use on each of the PRI lines going into the PM3. You see that the first PRI is full of "Analog" calls, and the second PRI has a few calls on it too. Feel free to look at the other menus too.