i am ordering an AT&T circuit for one of my offices. i am also going to order a T1 card, but I'm not even sure exactly what that card is called. It is NOT a PRI circuit. Does the name of the card have anything to do with the release? and how can i tell if i even have room in the cabinet for a t1 card? it's for a remote location. I think the T1 card can only go in one specific cabinet anyway, correct? thank you.