Messaging - Optus S2 User Manual

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MESSAGING

Messaging via the DATA & MAINTENANCE Port
In order to send and receive messages via the DATA &
MAINTENANCE port of the Optus MobileSat S2, an external
terminal should be connected to the port which runs
appropriate communication software. The following table lists
the message types that can be sent and received from the
DATA & MAINTENANCE port and the direction of the message.
Messages Direction Relative to MOBILESAT S2
Normal
One way
SCADA
Distress
GPS
Normal Message
This message allows 3 bytes of user information to be
transferred in either direction between the Optus MobileSat
system and the Optus MobileSat S2 transciever.
One-way Message
A One Way Message is the same as a Normal Message,
although the transmission of the message is not
acknowledged.
SCADA Message
This message is similar in structure to a Normal Message,
but the message is held at the earth station waiting for the
pre-determined Optus MobileSat S2 "wake up" time,
whereupon it is sent.
Distress Message
The Distress Message allows the earth station to know your
phone number and location (if the GPS navigational
equipment is connected to the unit). When a Distress Message
is sent via the DATA & MAINTENANCE port, the user must
both
both
in
out
out
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5 MESSAGING
enter the GPS position as it will not be read from the GPS
navigational equipment.
Note: Optus does not presently support distress messaging.
EMERGENCY
Since Optus does not support distress messaging, you
should dial your usual emergency number 000.
GPS Messaging
The Optus MobileSat S2 can be configured to operate with
GPS equipment that can be either internal or external to the
transceiver. The Optus MobileSat S2 then reports this position
via a message sent 'on request' or periodically.
This type of message can be used to monitor operating zones
of Optus MobileSat S2 users, or for GPS based fleet
management systems.
Use of Mailboxes
The Optus MobileSat S2 has 32 mailboxes or memory
locations that are used by the system to store various
information parameters of the unit. The Optus MobileSat S2
will automatically store relevant information in predefined
mailboxes. You can also set various mailboxes via the DATA &
MAINTENANCE port using an external terminal and
appropriate communication software.
These mailboxes can be used in data acquisition applications
such as remote monitoring systems. Contact your Authorised
MobileSat Dealer for more information.
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