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MPTP | MPTP commands 33

Reception

Depending on the authorization of the Control Centre which sent the request, a new tracking process may

be created or the request may be disregarded altogether. Cf. section 2.1.3 for more information.

Command format

Length: 39…46 characters

Command*

Trigger type

Service state

Radius

(Limit)

Method

(Allowed value)

Area centre

(Trigger special data)

Interval

(Data)

4 1 1 1 1 1 1…4 1 1 1 24 1 1…5

?TRG _ 0 _ 1 _ 1000 _ 0 _ N68.28.43,9_

E027.27.02,4

_ 15

*) cf. section 3.1 for description of this field.

The special fields of the command are as follows:

Field Description Range

Trigger type Trigger type of complex tracking request

message, as defined in section 4.2.1.4. In

this case, the trigger type number is 0.

0…9

Service state Activity of tracking process. Value 1 should

be used; otherwise the process will not be

activated.

0…1

Radius Radius of tracked area. 1…9999 (m)

Method Method of area tracking, as described above:

0: report while outside the area

1: report while inside the area

2: report arrival

3: report departure

4: report arrival and departure

0…4

Area centre Coordinates of centre point of the area, in

WGS-84 format.

cf. field Position in

section 3.1.

Interval Time between sending of tracking reports, in

minutes.

The value in this field is also used when the

GPS receiver is off when the terminal

receives the request. It defines the interval

at which the GPS is automatically switched

on for checking the instrument’s position in

1…65534 (mins)

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 106 107

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