Batboard

I picked up a Motorola N1019B tone paging generator recently. I am wondering if anyone has info on this unit (what are the pinouts for the 8 terminals on the back?)

Thanks a lot!

FireRadio

#1 = ground
#2 = mike shield
#3 = tone out/mike Hi pin 2
#4 = PTT
#5 = Mike pin 3
#6 = Mike pin 4
#7 = external power -
#8 = external power +