Siemens SINAUT MD720-3, System Manual, Page: 26 / 76

SINAUT MD720-3 in Terminal Mode
SINAUT MD720-3
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C79000-G8976-C211
4.5 Entering AT commands
The SINAUT MD720-3 is controlled by AT commands, which are entered either by
the connected application or manually by terminal program.
Working with a terminal program
To be able to control the device directly via AT commands, use a terminal program,
e.g. HyperTerminal.
Note the following settings:
Make the connection: COM port to which the device is connected
Speed: 19200 Bit/s
Data bits: 8
Parity: N o
Stop bits: 1
Duplex: F ull
PIN in Terminal-Mode
Enter the PIN
If the LED S blinks slowly (1 time each second), the SINAUT MD720-3 waits for a
PIN entry.
In Terminal-Mode the PIN need to be entered using the AT command AT+CPIN.
Example:
Command: at+cpin="0000“ // Input incl. “ “
Response: OK
The number of permitted trial to enter the PIN is limited by the SIM card.
Normally three attempts are allowed, i.e. you may enter two times back-to-back a
wrong PIN, at the third attempt the right PIN must be entered, otherwise the SIM
will be blocked. In this case the SIM card can only be unblocked by entering the
PUK.