Couple of questions hoping someone canhelp out with. I am population our box in group A with DS1 and DS3 cards. The backplane will house a Electrical I/F 84 SMB. Just curious how I connect to the SMB. Not exactly sure what a SMB is. I want to easily connect my DS1's and DS3's to the backplane and stay on one side of the box, either A or B. Thanks for the help...