We have an existing T1 line with AT&T for one of our 888 #. The person who used to handle our definity has ordered a T1 line by another carrier to replace the AT&T one . I would like to know if there is a DEFINITY command than can locate my existing T1 with AT&T, So I can just replaced with the new one. Also is there anything else needs to be done on the Definity switch after connecting the new T1. Appreciate any assistance.