Vaisala Hydromet Data Collection Platform - Manual (Page 154)

User's Guide ______________________________________________________________________
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4. It is impossible to have default parameters that would work
everywhere with all different telephone network infrastructures. If
the default parameters do not seem to work, you should try
manually, for example, by using a PC terminal program, to
establish a modem connection between the weather station and the
data collection system, and to find out the correct parameters. Also
note that the default parameters are seldom optimal, for example,
in minimizing the connection time.
ORBCOMM Interface
The ORBCOMM interface uses Low-Earth-Orbiting (LEO) satellites,
enabling the use of low power and small antenna in the transmitter
terminals. The ORBCOMM system provides also bidirectional satellite
communications through Internet e-mail.
There are two main transfer modes between the Ground Control Center
(GCC) and the remote site (system).
- Message mode: Both the remote site and the GCC have
simultaneous contact with the satellite.
- Globalgram mode: The satellite receives a message from the
remote site and the satellite stores the message for transmission
until it has contact with the GCC.
The ORBCOMM interface complies with ORBCOMM Serial Interface
Specification with Document ID E89959915-Revision C. It has been
tested with the Panasonic KX-G7101 ORBCOMM subscriber
communicator. Panasonic KX-G7101 contains also a GPS receiver,
which can be used for acquiring location and accurate time information.
More information on ORBCOMM is available at
http://www.orbcomm.com.