also the key in back is for "free calls by owner" thats what that does, put key in turn it now 25 cents is not required to make a call, local or long distance.
I think the only diffrence on the 707 and 727 is the rom, otherwise their identical, or so i was told years ago, and think gtel also sold it but no luck finding manual, but didnt matter to me as a had a brand new 909 (no PTT button) i need the stand for, the 707 was a bonus it was going to be junked, but held on to it.