GLOBALSAT TR-203A - Manual (Page 91)

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15 Simple Command
You could send simple commands by SMS to TR-203 to activate the following functions.
Note:
Before sending the simple commands, you still have to set the concerning parameters.
For example, you have to set the phone number for voice monitor.
Note:
To enable the simple command, please make the parameter A5=1.
For example, GSS, 011412000010789,3,0,A5=1*2c!
Simple Command Activated action Equal Command
“rs” Re-start TR-203 LH
“ir” Immediate report N1
“pr” Periodic Mode M2
“ol” On-line Mode M3
“pk” Parking Mode M6
“vm” Voice Monitor N4
“sp” Standby Mode M7