Man Machine Interface
Version 8 dated 15.03.00
142
Siemens Information and Communication Products
6
Man Machine Interface
6.1
Overview
The Siemens M20 can be operated either via an MMI or with AT+C commands. One interface only should be used at any
given time. Simultaneous operation of both interfaces has not been provided for although no algorithm preventing simul-
taneous operation of both interfaces exists.
Access to data services is performed with AT+C commands and is thus not supported by the MMI.
The main parts of the user interface are:
• LCD display (dot-matrix, 2 lines, 16 characters)
• 21 keys (12 keyblock, 9 function keys)
• Handset (microphone and loudspeaker)
• Hookswitch
• Buzzer
Note
: the keypad driver supports 24 keys, though only 21 keys are used by the MMI software implemented.
6.2
Keypad address matrix
Table 6-1
Keypad address matrix
Table 6-2
Description of keypad
All features offered are activated or configured using function keys or codes (menu short-cuts). The codes are selected to
conform to ETS 300 511. User guidance via menus is not supported. The user dialogs or input prompts are output in the
following languages:
• English (factory default)
• German
• French
• Portuguese
• Spanish.
KPC0
KPC1
KPC2
KPC3
KPR0
<KW3>,
<KW1>,
unused1
unused2
KPR1
<KW4>
<KW2>
<DIAL>
unused3
KPR2
<WW>
<1>
<2>
<3>
KPR3
<+>
<4>
<5>
<6>
KPR4
<->
<7>
<8>
<9>
KPR5
<SMS>
<*>
<0>
<#>
Keypad
Meaning
<0>, <1>,..., <9>, <*>, <#>
Keys
<DIAL>
Dial key (OK key)
<KW1>, <KW2>...KW4>
4 short keys
<WW>
Redial/cursor up
<SMS>
Short Message
<+>
increase volume: voice/buzzer
<->
decrease volume: voice/buzzer