AASTRA DT4x2 for MD Evolution User Guide EN - Manual (Page 146)

Installation
MD Evolution – Cordless DT412 / DT422 / DT432 146
Note: Avoid using a screwdriver as it may damage the
screw.
Chargers
Desktop charger for DT412/DT422
The desktop charger is used for charging your phone, but also for
storing it when you are placed at one location, for example at your
desk.The tilted design facilitates the use of handsfree operation, i.e.
in loud speaking mode. The charger is delivered with a plug-in
power supply and is connected into an ordinary wall socket.
Charging rack
Note: See also separate Installation Guide, supplied
together with your phone.
The charging rack is used for charging your phone and/or spare
batteries. When charging spare batteries an adapter is needed. The
wall mounted charging rack and its power supply are a modular
system which enables a number of installation configurations.
Each power supply can support several charging racks with four
positions for phones and/or batteries in each rack (see technical
specifications for the charging rack).
As the phone cannot distinguish between a desktop charger and
the charging rack, it is recommended that the alert signal is
silenced when placed in a rack, see section “ DT4X2 Adjustments ”
on page 125. There is also a SIM parameter that can be set in the
SIM card programmer by your system administrator.