User's Manual

keep alive time is shorter then select this function will be OK.) This function is very useful while using UDP

to prevent report lost.

Send a keep alive packet right before a due reports if no data stream within certain time: Parameters: On/Off,

and idle time.

Some GSM provider might cut connection, if there is no data within certain time. It might result report lost

in this “fake connection” duration. For example, you can set parameters in this region, ex 20 mins. (it means

if the unit did not send any data in this 20 mins (including keep alive or normal reports) ), then it will send a

keep alive packet to check if the GPRS connection is valid or not. If not, it will actively reconnect to GPRS

network.

Special command for SMS mode:

If the GT3200ST is not in the GPRS online status, user can send command &&Y02 or &&Y04 to ask unit to

connect to server. This command can be sent from any device via SMS;

&&Y02:

When received this command, system will actively try to connect to server in next 600 seconds.

&&Y04,[connection time],[report interval]:

For example: &&Y04, 3600, 60

When received this command, system will connect to server in the next 3600 seconds, and send one

report out every 60 seconds.

4. [Roam report]