The phone is a Mitel Superset 4150. Ext. 200 with three total apperanceson keys 1,3,5. CO Lines built on Key 2,4,6,8,10. key 12 DND, 13 headset, and 14 direct page. Keys 7,9 and 11 are blank. I have a PKM 48 with BFS keys to page ext's 201-210. Co trunks are built an NON-direct dial trunks 101-105 in trunk group 1. no day service, N1 and N2 go to Express messaging to play auto attendant after hours.