hello guys, sorry to submit a note like this. my (new}customer told me yesterday he needs me to put in a used nec system for him tomorrow. im not sure what model it is. he doesnt even have it yet but will pick it up today. all they can tell me is the part number off a phone. it is 80573. can anyone tell me what nec uses this phone. i have had a little experiance programming the pro and elite 48. if it programs like those i can figure it out. if not i may be in a jam. anyone have an idea what system this phone goes with. thanks dave