GL100 @Track Air Interface Protocol
If <
report mode
> is set as 1 (Force on GPRS), the terminal will only use the secondary
backend server for backup and the SMS gate will not be used.
Example:
Configure the terminal with the command as following.
AT+GTSRI=gl100,0,
0
,cmnet,cmnet,cmnet,124.79.182.171,7001,+8613888888888,200808071000
01
The “
0
” means “TCP short-connect mode”.
The backend server sends the acknowledgement message to confirm:
+ACK:GTSRI,359231030000010,20080807100001,20090112104725,000a,0102100203
¾
TCP Long-connect Mode
Set <
active session
> as 1 by the
AT+GTSRI
command. Meanwhile, <
report mode
> cannot be
set as 2 (Force on SMS).
The terminal will connect to the backend server by TCP protocol after power on, maintaining
the connection and will never disconnect. If the connection is dropped by the network, the
terminal will try to connect again.
The terminal checks the connection status by heartbeat data. (For heartbeat, please refer to
chapter 3.4). The terminal will send the
AT+GTHBD
special command to the backend server
every specified period of time. The backend server will reply with the message
+RESP:GTHBD
. If the terminal cannot receive this message from the backend server, the
connection will be considered as dropped.
In this mode, the terminal does not attempt to connect to the secondary server or SMS
gateway even though the main server cannot be accessed successfully.
Example:
The following command is used:
AT+GTSRI=gl100,0,
1
,cmnet,cmnet,cmnet,124.79.182.171,7001,+8613888888888,200808071000
01
The boldfaced “
1
” in this command means “TCP long-connect mode” is set.
After the terminal receives the configuration command successfully, it will give the following
acknowledgement message:
+ACK:GTSRI,359231030000010,20080807100001,20090112104725,000a,0102100203
¾
UDP Mode
<
active session
> is set as 2 and <
report mode
> cannot be set as 2 (Force on SMS).
The terminal sends all messages via UDP protocol.
TRACGL100AN002
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