User guide
Doortello Business
Issue 1.00
Page 13
Loudspeaker volume
Microphone volume
Doortello Business volume adjustment
First activation
Install and configure the door station as you wish. Ensure that you follow the
instructions of the single modules for a correct installation. Connect the module
together with the delivered flat cable, if needed. Select the correct addressing of
the module as described. After this you can connect the door phone with the
telephone line and the external power supply.
External power supply
- Connect FIRST the telephone line and then the external power supply.
Please note!
The external power supply voltage MUST NOT BE HIGHER THEN 12 Vdc! Check
the voltage using a voltmeter! A higher voltage may seriously damage the
device voiding you warranty! We suggest the use of out PRS 231S power
supply unit.
Please note!
You need a separate power supply unit for each door phone you are going to
install!
Please note!
The connector I/L doesn’t have a polarity. You can c/-as you wish.
- After you switch on the power supply the unit will follow an internal start up
procedure. This may take some seconds. If you have a module with LED (like the