RTS SIP-ISDN, Hardware & Software Manual, Page: 16 / 102

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3.3 Earthing of the system
For EMC reasons an earthing via the earthing screw of the system must be carried out in
either case.
3.4 Operational elements on the front side
The system has an illuminated graphical display with a resolution of 160 x 32 Pixels and
21 operating buttons.
On the right next to the display there are two softkeys whose current functions are indi-
cated on the display. In the middle there are two buttons for navigation (selection up-
wards/downwards), two buttons for accepting/dropping calls as well as an
OK
button.
The numerical pad supports in addition to the numerics
0...9
the ’
*
’ and ’
#
’ key. For text
entries the numerical pad can also be used as normal keypad.
The operation is similiar to standard mobile telephones.
FIG. 3 OPERATIONAL ELEMENTS ON THE FRONT SIDE
ATTENTION Earthing
A lacking earthing can cause functional deficiencies within the unit.
!
Softkeys Navigation
buttons
Establish connection
Accept call
Drop/
Main menu
Keypad for
dialling/ text entry
B channel
shift
Confirm
entry/
Graphical
display
Status window