Change out m2250 on opt 11 rel 25 to m2616. Was able to out the ATDN 1849 and add it to the new 2616 key 0. All work well and can 0 out from call pilot. Not able to 0 out from any phone on the pbx. Looking for help getting my internal 0 out to front desk back. I think that I need to out ATDN 0 and build it in ld 23 to ncfw to 1849. Do not know how to out ATDN 0.