4 installation setup instructions, A) dip switches settings, S201 switches settings – V-Tech DT-IP Technical Guide User Manual
Page 25: Sw201 switches settings, Item bit state descriptions bit-1, Bit-2, Bit-3, Bit-4, Ip-2 wire system technical guide, Dip switch status(defaults are off)

2.2.4 Installation Setup Instructions
DIP Switch Status(Defaults are OFF)
a) DIP switches settings:
ON(1)
=
OFF(0)
=
ON
ON
S201 switches settings:
Total 6 bits switches.Bit-6 is used to set the video impedance matches.
Functions of bit1 to bit 5 are reserved.
1 2 3 4 5
6
ON
1 2 3 4 5
6
ON
SW201 switches settings:
Bit state
Setting
Bit state
Setting
Set to high
impedance
Match video
impedance
Item
Bit state
Descriptions
Bit-1
/ /
Reserved
Bit-2
Villa application mode
Apartment application mode
Bit-3
Set to "on",press Direct Call Guard Unit on monitor to
call switchboard
Set to "off",press Direct Call Guard Unit on monitor to
call local Guard monitor
Bit-4
Set as common door station
Set as door station
1 2
3
4
ON
1 2
3
4
ON
1
2
3 4
ON
1
2
3 4
ON
1 2 3
4
ON
1 2 3
4
ON
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IP-2 wire system technical guide