Comelit MT 40705 - Manual (Page 14)

2.6 Dip Switch Settings.
Termination and Master/Slave: Set the switches according to your configuration.
S1
Figure 7 – Keyboard DIP Switches
Table 1 - S1 Switch Setting
8
NO SETTING DESCRIPTION
1
ON
DOME1 Termination
OFF
2
ON
DOME2 Termination
OFF
3
ON
J-BOX Data2 Termination
OFF
4~6 OFF Reserved
7
ON DOWNLOAD ON
OFF DOWNLOAD OFF
8
ON SLAVE
OFF MASTER
ON
9J 1 2 3 4 5 6 7 8