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17. Set the time interval
ACC on time interval (default is 20 seconds)
Command: 805+password+Blank+T
Sample: 8050000 20
Reply: SET OK
T means the time interval, the unit is second,
It from 0 to 18000 seconds,
When T=0 means close GPRS.
ACC off time interval (default is 180 seconds)
Command: 809+password+Blank+T
Sample: 8090000 180
Reply: SET OK
T means the time interval, the unit is second,
It from 0 to 18000 seconds,
When T=0 means close GPRS.
The minimum time interval is 10 seconds.