Bosch GSM 509 - Manual (Page 18)

Keypad lock
To avoid making calls accidentally you can lock
the keypad:
Press »MENU«
Press
If you try to activate one of the keys, the dis-
play will tell you that the keypad is locked. The
keypad lock is, however, automatically dis-
abled
– during an incoming call until you have
finished your conversation
– when the telephone is placed in the
handsfree car kit
When you want to unlock the keypad again:
Press »UNLOCK«
Press
Unstructured supplementary
services (USSD)
On some networks you have the possibility of
sending unstructured supplementary service
strings to your network. This is a feature
completely defined by your network allowing
direct communication between you and the
network. An example of a USSD could be that
entering a certain code of digits and/or letters
terminated by a
tells your network to send
you a scale of charges. A USSD service string
should always be terminated by pressing the
-key and »CALL«.
In order to be able to send USSD service
strings you must enter the Phone setup menu
and select »Speed dialling off«. Pressing the
relevant keys 0 to 9 for one second will lead
you to the alpha mode enabling you to enter
letters and digits instead of only digits.
Contact your network operator for further
information.
1
2
1
2
Setup menu
Keypad lock
32 33
Calculator (Menu 8)
Enter the Setup menu by pressing »MENU«
Select »Calculator«
When you enter this menu your phone acts as
an ordinary calculator.
How to use the calculator
The equal-sign (=) is found on the right hand
function key.
Hold down the relevant key for one second to
get the desired arithmetic operation.
Key Operation
1 Addition (+)
2 Multiplication (*)
3 Square function (x 2 )
4 Subtraction (-)
5 Division (/)
6 Square root ( √ )
7 Percentage (%)
8 Fractions (1/x)
9 Exponent (E)
M+ or decimal point (press briefly)
0 MC
MR or -/+ (neg./pos.) (press briefly)
Quick survey
By pressing
you get access to a survey of
what arithmetic operation is placed on what
key.
An arithmetic operation can then be selected
directly from the survey by pressing the assign-
ed key briefly.
Calculation examples
5 plus 2
Press 5, hold down 1 for one second, press 2
and press =
»7«
8 divided by 4
Press 8, hold down 5 for one second, press 4
and press =
»2«
Square root of 8
Press 8 and hold down 6 for one second
»2.8284271«
15 per cent of 60
Press 6, 0, hold down 2 for one second,
press 1, 5, hold down 7 for one second »9«
-5.2 times 10,000
Press 5,
, 2, , hold down 2 for one
second, press 1, hold down 9 for one second,
press 4 and finally =
»-52000«
As soon as a figure is stored in the memory this
will be indicated on the display by .
You can access the memory by pressing
or
the -key (MR).
The memory is reset each time you switch off
your phone.
Back to standby mode
Press »CLEAR« and hold down »EXIT« for
one second.
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