Both the J890 and J892(J892 also has an ASCII comm switch) have a switch pack, consisting of eight DIP switches. The switch pack is located at the rear (top center) of the unit. The switch pack is mounted on the l/O processor board, and uses switches 1 to 5 to determine the drop address. Switches 6-8 are always set towards the right. The diagram below shows the J890/J892 drop address DIP switch location and settings.