General product description M20
Version 8 dated 15.03.00 10
Siemens Information and Communication Products
A
The Siemens M20 offers the following functions:
Additional Features:
• Dial tone
The SIEMENS M20 provides no dial tone at all or two permanently defined types of dial tone, as selected.
• Power management/backup routine
• DTMF
DTMF tones can be generated.
• PIN handling (protection can be activated/deactivated)
• Reload capability (software update)
Interfaces:
One serial interface (control, data transmission and software updates)
• SIM card reader interface for 3 V SIM cards.
• Analog interface for headset and microphone connection (telephone receiver)
• Digital Audio Interface (DAI)
Echo suppression for handsfree mode can be implemented by an external connection
• Ringer interface
Different ring volumes can be set
• Input port
The power supply status of the application can be signalled on the display (network operation, battery operation,
battery supply jeopardized, no display)
• Display interface
Display controller for dot display can be controlled (2 lines x 13 characters).
• Connector
All interfaces with the exception of the antenna (type: SMR nano) are fed out by means of a connector on the
hardware side. The connector is mechanically stable, the associated jacks can be purchased and installed world-
wide by the integrators.
• Interface for a keypad with 4 x 6 keyboard matrix.
• Interface to a tuning fork contact (hookswitch)
• Power supply
• On switch
3.1 Teleservices
Table 3-1 Teleservices
No GSM standard Teleservice Reference Available
via AT+C
Available
via MMI
1 TS11 Telephony GSM 02.03 A.1.1 5.3 6.5
2 TS12 Emergency Call GSM 02.03 A.1.2 5.3 6.5
3 TS21 Short Message MT/PP GSM 02.03 A.1.3 5.6 6.5.13
4 TS22 Short Message MO/PP GSM 02.03 A.1.3.1 5.6 –
5 TS23 SMS Cell Broadcast GSM 02.03 A.1.3.2 5.6 6.5.13
6 TS62 Teleservice Automatic G3 fax GSM 02.03 A.1.5 5.5 –
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