I have 5 sights with Inter-Tel AXXESS's that are tied together with T1's, I am interested in putting a T1 in to tie one of the AXXESS PBX's to a Nortel Option 81C. The Inter-tels are able to five digit dial to each other and i'm looking to make the Nortel to Inter-tel as transparent as possible. Has anybody out there done this already or have any suggestions? changing the Nortel to an Inter-tel isn't even an option.