The only thing that I would add to this is if your going to recover off site is check to see if all the incoming pairs from your telco are punched down at the backboard.

Our company did a disaster plan review a few years ago and found that while we had high count cables coming in not all locations had them punched down on the bix blocks. The idea was to split up our downtown customer care agents to the different suburban service centres if we had the lines available.

Our ILEC as part of the review suggested we pay them to punch down all incoming pairs to speed up the time to bring everything back on line.