Motorola G24 Guide Developer's Manual page 40

Improved OEM Features
2. The G24 opens a TCP/IP stack as one of its "sockets" (it must know the target's IP address
and port number).
3. Once the connection is established, data is transferred freely in both directions (upload and
download).
Connection with another G24 using the "GPRS Manager"
The following occurs when creating a TCP/IP connection with another G24 using the "GPRS
Manager":
1. The OEM on the target side (server) uses the "GPRS Manager" application. When using this
application the TCP/IP is external to the OEM. (External TCP stack is used).
2. The target side activates the "server application" (The term "server application" means an
application that has the ability to listen on a given IP address and port number).
3. After connecting to the GPRS network, the "server" sends its IP address to the G24 using an
alternative connection (for example, CSD, SMS and so on).
4. The server application listens on a known port, waiting for G24 to connect.
5. The G24 connects to the same GPRS network as the server, and receives an IP address
(using the +MIPCALL command).
6. The G24 initiates a TCP/IP connection with the listening "server". (It knows the IP address
and port number of the server).
7. Once the server is connected, the TCP/IP connection is created and data can be transferred
freely in both directions (upload and download).
1-6 AT Commands Reference Manual December 31, 2007