WM_PRJ_M13_UGD_001 - 001
20th July 2004
© 2004
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Wavecom Confidential & Proprietary Information
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5.1.3 Checking the communication with the modem
! Connect the RS232 link between the DTE (port COM) and the modem
(DCE).
! Configure the RS232 port of the DTE as follows:
! Bits per second: 115.200 bps,
! Data bits: 8,
! Parity: None,
! Stop bits: 1,
! Flow control: hardware.
! Using a communication software such as Hyperterminal, enter the
AT
↵ command. The response of the modem must be
OK
displayed in
the Hyperterminal window.
! If the communication cannot be established with the modem, do the
following:
! Check the RS232 connection between the DTE and the
modem (DCE),
! Check the configuration of the port COM used on the DTE.
! Example of AT commands which can be used after getting started the
modem:
!
AT+CGMI
: modem answer is “WAVECOM MODEM” when
serial link is OK.
!
AT+CPIN=xxxx
: to enter a PIN code xxxx (if activated).
!
AT+CSQ
: to verify the received signal strength.
!
AT+CREG?
: to verify the registration of the modem on the
network.
!
ATD<phone number>;
: to initiate a voice call.
!
ATH
: to hang up (end of call).
For further information about these AT commands and their associated
parameters, refer to document [1].
5.1.4 Resetting the modem
For resetting the modem, a hardware reset signal is available on pin 14 of the
Sub HD 15-pin connector (RESET).
The reset of the modem is carried out when this pin is low for at least 500 µs.
WARNING
: This signal has to be considered as an emergency reset only. For
further details about the reset of the modem, refer to paragraph 7.6.
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