My manager recently replaced his black M3904 set with a black Phase III phone that has a sticker on the back with the part # NTMN34GA. When I do an IDU of his TN the part # that comes up is NTMN03EA. How does the part # update in the PBX? And if the phone is black why does the sticker on his new phone show a 34 instead of an 03? I appreciate your help. Thank you.