AT Commands Reference Manual - wireless netcontrol GmbH

Chapter 4: Using the Commands
Packet Data
When using the packet data, it is recommended to implement a "keep alive" mechanism.
The H24 memory resources should not be used as a buffer for the user, the user maintains its own
memory and flow control in its own application. The H24 has finite limited resources such as
network related, SIM card and phone memory. In general the user should use a single resource at
a time. As an example, when H24 packet data network resources are in an active session, user
should not manually detach from the network or place a CSD call etc.
Note: The basic packet data concept is be “always connected” and there is no charge for being
connected (only per real data transferred). packet data users are advised to connect the
packet data network once in the beginning of a session and remain connected rather then
to toggle from online to offline and back in a high rate. In specific cases when this is
needed, contact customer care for advice and knowledge base.
Establishing Packet Data PDP Context
When using the packet data network for any IP data, you must be attached to the packet data
network before activating PDP context.
Activating a Saved Profile in H24
AT+CGATT=1
//By default, after power-up, the H24 attaches to the packet data
network, if possible (if the network and SIM allow)
AT+CGATT?
//Check your connection status
AT+CGDCONT=1,"IP","RTY","123.32.45.9"//Context definition example
Two Ways to Activate PDP Context
Each of the two main ways in which to activate PDP context are described below.
Using the Packet Data Wizard Application
1. Double-click the button predefined as the dialer for this provider to automatically establish
PDP context. If the H24 was not previously attached to packet data, it will be attached
automatically.
2. Setup configuration.
3. Enter into the wizard, the parameters provided by your operator.
4. Set definitions to allow your http/ftp browser to use the H24 as a port to the Internet.
5. Usage:
• Open the packet data Manager.
• Double-click the dialer icon to select and activate the provider of your choice (multiple
providers may be displayed in
the list).
• After dialing, your temporary IP address, the packet data session message will be
displayed.
• Minimize the packet data wizard window and use your http/ftp browser (Internet
Explorer, Netscape).
April 15, 2010 H24 - AT Commands Reference Manual 4-17