Hitachi CU-HD500 - System Settings and Intercom

20
Service information
Intercom system setting
C U H 5-M A IN B oard
SW19,21
2 wire
4 wire
SW1 –No.6
RTS
Clear
com
SW18,20
2 wire
4 wire
1
2
3
4
O N
5
6
7
8