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23.1.3
Typical uses
Requirements for using
modem
Configuration of Devices
Modems
•
To transmit NMEA messages. •
•
To transmit real-time data
Example of use
Step
Description
1.
The reference is equipped with a modem.
2.
The rover is equipped with a digital cellular phone.
3.
Ensure that the modem is switched on.
4.
The rover digital cellular phone contacts the selected reference of which the phone
number was pre-defined. Refer to "23.3 Creating a New Device".
5.
One rover can dial in to the reference modem at a time.
6.
As soon as the reference modem is contacted, it sends its data to the rover digital
cellular phone that has called.
Several modem numbers can be pre-defined on the rover. Dialing a different
number changes the reference station.
AT command language must be supported by the modem. Refer to "23.3 Creating a New
Device".
To download raw observations from a remote location.
•
GPS1200+
578
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