
Rev 1.1 9/22/14 35
Communicating with the
USR3500
ATD<phone
number>;
(Do not forget the « ;
» at the end for
« voice » call)
Communication established.
PIN code not entered (with +CMEE =
1 mode*).
AOC credit exceeded or
communications is already
established.
Communication has
been lost
Store the parameters
in EEPROM
The configuration settings are stored
in EEPROM (non-volatile memory).
Start Courier M2M
application
* The command AT+CMEE=1 switches to a mode that enables a more complete error diagnostic.
6.11. IP Data Connection
Enter AT+WOPEN=1 to start the Courier M2M application. A startup banner will display.
Use AT+WOPEN=0 to stop the application.
Lib Version 1.9.1
Courier M2M Wireless Device
Application Started
To use IP data services, you need to configure an APN. Your cellular account needs to
have data services, and the cellular provider must provide you with an APN string.
Example: Enter AT$CGDCONT=1,”m2m.apn.com” to set the APN.
Note: The APN string: “m2m.apn.com” is a sample. Do not use.
Use AT+CGREG? to verify GPRS registration.
AT+CGREG?
+CGREG: 0,1
OK
A response with 0,1 indicates that your device is registered on the GPRS network. A
response of 0,0 would indicate not registered. Once you are registered, Courier M2M
will automatically activate a PDP context. Enter AT$IP to verify the device’s IP address.
AT$IP
$IP: "<deviceID>",0,"203.0.113.1"
OK
Refer to the Courier M2M Application Guide at http://www.usr.com/support/3500 for
more information regarding data connections.
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