I have a new addition to the family coming. It's an Executone 16 button set very similar to a call director in appearance. It is a model # E-316R(B) Key Telephone Set. Does anyone know anything about this set? Is it really 1A2 or something else? It has 2 25 pair amphenols as I would expect to find on a key set this big. And the most important question- Does anyone have a practice for this gem? All searches on google have been fruitless. I would really like to not have to guess about the wiring in a set with 50 pairs. Thanks guys.