Concox GT03C User Manual page 10

upper left corner, the latitude of lower right corner, the longitude of lower right corner, IN#".
E.g.
FENCE,ON,1,N22.541183,E113.916,N22.557743,E113.892334,IN#
The terminal will reply "OK" if set successfully. Any time the terminal enters this rectangle fence, it
will send alarm message to the preset SOS numbers.
 Go out fence SMS:
Any number send the command
upper left corner, the latitude of lower right corner, the longitude of lower right corner,
OUT#".
E.g.
FENCE,ON,1,N22.541183,E113.916,N22.557743,E113.892334,OUT#
The terminal will reply "OK" if set successfully. Any time the terminal leaves this rectangle fence,
it will send alarm message to the preset SOS numbers.
(3) Example of alarm message
While the Geo-fence function is activated, each time the terminal enters or leaves the fence area,
there will be alarm message sent to the preset SOS numbers.
E.g.
GEO FenceOut[DateTime:12-06-01 14:58:03] http://maps.google.com/maps?q=N22.577137,E113.
916785
GEO FenceIn[DateTime:12-06-01 14:58:03] http://maps.google.com/maps?q=N22.577137,E113.9
16785
4.5.2 Disable Geo fence
Send SMS to disable geo-fence function:
After get reply "OK", geo fence function is off.
4.5.3 Check Geo fence status
Send the command
SEEFENCE#
If geo fence is off, it will reply SMS "Switch:OFF".
If geo fence is on, it will reply SMS
"Switch:ON;State:IN&OUT;Lat:N22.567000;Lon:E113.890000,Radius:100M;Fence Type:Circle."
"FENCE,ON,1,the latitude of upper left corner, the longitude of
FENCE,OFF#
to check whether geo fence function is on or off.