User manual

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Check of dialling function
Check the dialling function by dialling with DTMF tone. Command: ATDT followed by
any given number. With the command ATH, or better AT+CHUP, you can interrupt
any connection.
Transmission of a SMS
Call the SMS-service center of the provider with AT+CSCA= "+49xxxxxxxxxx" (ex-
ample for Germany).
The SMS has to be transferred to the modem in PDU-Mode. Please refer to the
description of the AT commands in Appendix 1.
11. Troubleshooting
In case the modem still reacts you can load the standard settings of the manufac-
turer with the command AT&F. Then you have to re-start the program and adjust all
settings. Please ensure that the COM-port parameters (baudrate, data bits, parity,
stop bits) are correct.
Check whether other programs use the COM- port of the computer (PC). E.g., Hot-
sync managers can retain control of the port and should be disabled when not in use.
Restart the computer and activate only the terminal program.
Connection cannot be established:
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Common mistakes that may happen are:
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• The SIM-card is not inserted to the modem.
• The PIN-number is not entered.
• A not available GSM network is selected.
• The GSM Modem is not booked into the GSM network.
• The antenna is not connected, not suitable or is damaged.
• The wrong telephone number was entered.=
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Possible system faults=
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• Another connection is active.
• The call is not answered by the receiver.=