User guide
Doortello Business
Issue 1.00
Page 4
Connections
92 mm
100 mm
Microphone Loudspeaker
ES speakerphone. Front and back view.
Volume control
of an existing speakerphone grid, i.e. inside existing old door stations, customer
designed installations, parking house information systems, etc. Using the plastic
adapter frames it is also possible to the install the ES modules in existing letter
boxes or pedestals.
The door phone needs to be connected to a analogue telephone line using two
wires, further the optional external power supply can be use to power the
illumination and the heating element of the unit. The modules of the door station
are connected together using the internal DB bus. Fir the BG version an external
chime button encoding unit is available to connect them to the DB bus. Up to 127
single chime button and a dial pad with 16 buttons (12 for the dial and 4 free
programmable functional buttons) can be connected to the Doortello Business
door phone using the DB bus.
The unit has also two integrated dry driver contacts to command door openers or
other applications, like video cameras. A serial RS 485 interface for the connection
of peripheral expansion units completes the connection block of the device.
The programming of the telephone numbers and all other features are done using
a DTMF dial. A complete description of the programming can be found in the
chapter
Programming.
DB Bus
Line impedance
