Rainbow Electronics GM862-QUAD-PY - Manual (Page 52)

Easy GPRS User Guide
80000ST10028 Rev. 4 - 16/07/08
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 52 of 63
Define GSM Context AT#GSMCONT=0,”IP”,” 3359009000”,”0.0.0.0”
GPRS Context Activation AT#SGACT=0,1
You have to define GSM context filling in the information of the Internet Service Provider Number.
Next step is activation of GSM context which gives as reply the IP of the module assigned by network:
AT#SGACT=0,1
#SGACT: 217.200.58.225
OK
Configuration for the module that opens connection (client):
Define PDP Context AT+CGDCONT=1,”IP”,”ibox.tim.it”,”0.0.0.0”
GPRS Context Activation AT#SGACT=1,1
You have to define PDP context filling in the information of APN in this example: ibox.tim.it.
Next step is activation of GPRS context which gives as reply the IP of the module assigned by
network.
AT#SGACT=1,1
#SGACT: 217.201.142.223
OK
Now, on the server side, before opening socket in listen it is possible to define an accept firewall chain
in order to filter IP of the senders.
Then with the AT command AT#SL=1,1,1024,0 the socket will be set in listen on the port #1024:
Firewall Setup AT#FRWL=1,” 217.201.142.223”,”0.0.0.0”
Socket Listen AT#SL=1,1,1024
On the client side, you can open the connection with the remote host with IP address 217.200.58.225
on the port 1024 (as in example):
Socket Dial AT#SD=2,0,1024,” 217.200.58.225”
NOTE: IP of the modules can be verified with the following AT command line: AT#CGPADDR=