Intelimax+4G User Manual
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IP Stack Auto Mode
When using IP STACK Auto the modem will behave as an IP Serial modem. When using
this mode the modem will transfer all incoming packets via the serial port to the host and
vice versa. The modem connects to the 3G/4G networks and acquires an IP address and
then runs the IP STACK server or client mode.
Intelimax+ IP Stack can be configured as a Server or Client mode. In Server mode, the
Intelimax+ will act as a socket server. The modem will listen on a specific TCP/UDP port
waiting for an incoming client socket connection. As soon as the client drops the socket
connection, the Intelimax+ will go back to socket listening mode as per IP stack
configuration. On the other hand, with client mode the Intelimax+ will try to establish a
socket connection to a preconfigured server IP address or DNS name and port number.
The client mode also supports a secondary server IP address just in case the primary
server cannot be reached. The in-built IP stack feature supports smarts such as PPP link
check, TCP link check, PPP link timeout, TCP link timeout and MTU settings.
Secure socket using SSLv3 can be used in both these modes as well as IP Stack Manual
Mode. Further detail on how to configure secure socket is in the IP Stack tab section.
IP Stack Manual Mode
With IPStack manual mode, the modem doesn’t initiate the PPP connection. The modem
will rely on the host on serial port to send the PPP initiation commands and acquire a
WAN IP connection.
The AT command to start the PPP session and open a socket is AT$$IPCTOS. The AT
command to close the socket and PPP session is AT$$IPCTCS.
Further AT command detail is included at the end of this manual.
Serial Modem Mode (Transparent / Pass-through)
This mode allows for the serial interface to connect through to the cellular module in the
modem. In this mode, the Intelimax+ processor still has some control and processing
abilities over the serial AT commands and connection processes. Used for Packet
Switched Date (PPP Pass-through) or Circuit Switched Data (CSD).
Circuit Switch Data Call
Circuit switch is a legacy style of communication where the user dials in to the modem
data terminating number. Circuit Switched Data call only operates under 3G network.
Standard set of AT commands used with Circuit Switch Call:
ATD Dial the Data number
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