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Developing Modem Applications
80-99208-1 Rev. D 5-21
Position Location Determination
The GSP-1620 modem has a “get position” AT command,
AT$QCPLS, that provides a latitude and longitude location as
well as a confidence value.
This command has a parameter to select between getting the
current position (via making a new request) or returning the
last stored position:
• If you select the current position and you are NOT in a
call, the modem returns “
ERROR.”
• If you select the stored position and there is no stored
position (you have never done a position request), the
modem returns “
ERROR.”
Note
For more information, see Position Location Service ($QCPLS) on page
6-66.
Using Packet Data
Globalstar and the GSP-1620 modem offer direct Internet
connectivity by bridging the “last thousand mile” air gap
using LEO satellites. This section details the capabilities
offered by the GSP-1620 modem for user connectivity and
packet data transmission.
The GSP-1620 modem lets the application device (DTE)
connected to the modem originate or receive a “packet data
call.” It establishes a PPP session, connects to the Internet,
and then establishes a session with a host application at the
remote end.
Note
For a comparison of packet and asynchronous data, see Table 5-1 on
page 5-4. For information about asynchronous data service, see Using
Asynchronous Data on page 5-30.