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GMT00 @Track Air Interface Protocol

TRACGMT100AN001 – 19 –

charging, the external power supply will power the unit, otherwise the internal

backup battery will supply power for unit.

 2: The external power supply will charge the internal backup battery when ignition on

is detected or when the internal backup battery capacity is less than 30 percent if

ignition is off. During charging, the external power supply will power the unit,

otherwise the internal backup battery will supply power for unit.

 <Agps Mode>: A numeric to indicate whether to enable AGPS. AGPS is helpful to improve

the ratio to get GPS position successfully and reduce the time to get GPS position.

 0: Disable the AGPS function.

 1: Enable the AGPS function.

The acknowledgment message of AT+GTCFG command:

 +ACK:GTCFG,

Example:

+ACK:GTCFG,080100,135790246811220,,0003,20090214093254,11F0$

Parameter

Length(byte)

Range/Format

Default

Protocol Version

XX0000 – XXFFFF,

X∈{'A' – 'Z','0' – '9'}

Unique ID

IMEI

Device Name

<=10

'0' – '9' 'a' – 'z' 'A' – 'Z'

Serial Number

0000 – FFFF

Send Time

YYYYMMDDHHMMSS

Count Number

0000 – FFFF

Tail Character

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