one of my remote offices has ONE T1 for all their in/outbound traffic. They have NO other route in the event that T1 goes down (no POTS lines, at least as far as I can tell from doing an LTM on all routes in LD 21). Would it be better to purchase another T1 as backup or just order some POTS lines? there are about 70 people there. If i go with a T1, should I order it from a different vendor? AT&T provides the one we currently have.