DoorBird D21 Série Manuel D'installation page 13

Should these requirements not be fulfilled, it may occur, for example that the
performance of audio and video is poor or push notifications are delayed or do
not arrive on your smartphone or tablet at all.
High-speed Internet (via landline): DSL, cable or optical fibre
Network: Ethernet, with DHCP
STEP 1: SWITCHING OFF POWER
Switch off the power to all wires leading to the assembly location, i.e.
the door chime, electric door opener, power supply unit for the video
door station etc.
STEP 2: DISMANTLING THE EXISTING DOORBELL
Should there already be a doorbell or door station on the exterior wall of the
house, please dismantle it.
STEP 3: DETERMINING THE ASSEMBLY LOCATION
The device uses an ultra wide-angle hemispheric lens so that even when the
person is a minimum distance of 50 cm (19.68 in) away from the device, a low
installation height is sufficient. The lens is therefore not mechanically adjustable.
The camera lens should be located at an altitude of at least 125 cm (49.22 in).
You may check this prior to the final mounting.
When choosing the assembly location, consider the lighting conditions. Avoid
direct sunlight, direct backlight and reflective surfaces.
Do not expose the device to direct sunlight. The housing temperature
NOT I C E
can exceed the maximum allowed temperature limit. This can result
in damage of electric and mechanic components of the device and
injuries especially when touching exterior parts of the device. White
and bright silver-colored front plates absorb less sunlight than dark
ones.
An image sensor must not be exposed to direct sunlight for an
NOT I C E
extended period of time. Direct sunlight will "blind" the camera
and may permanently bleach the small color filters on the image
sensor chip.
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