Panasonic System 850 Operating Instructions Manual page 19

Board Setting
Before installing this board, the following settings should be
made by qualified service personnel or system installers.
1. Confirm that jumper connectors (CN101, CN201,
CN301, CN401, CN501, CN601, CN701, and CN801)
on the board are positioned as shown below.
20
1
CN801
2
1 2
CN101