GPRS/GSM IP Communicator Installation | en 15
Bosch Security Systems, Inc. Installation and Operation Guide F01U133268 | 03 | 2010.05
Figure 3.4 Connections for PSTN (Contact ID) over GSM Mode
Callout Description
1a Power connection from ITS-DX4020-G to the control panel (12 VDC only) using
the supplied Molex cable
1b Power connection from ITS-DX4020-G to the control panel (12 VDC only) using
the bus terminals
2 Bus terminals on the control panel
3 PNL/PSTN connection from ITS-DX4020-G to the control panel
4 Phone terminals on the control panel (connect to the Ring [R] and Tip [T]
terminals)
1b
R
RH
T
TH
3
B
G
R
Y
4
1a
2
R
RH
T
TH
B
G
R
Y
3
4
2
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