Digi M10 - Manual (Page 9)

Digi m10 Technical Overview
Digi International, Inc. © 2009 Page 9 of 26
1.2 Communication using a Digi m10 Satellite
Modem
Once an antenna is properly hooked up to the Digi m10 and it has a clear line of sight to the sky,
the Digi m10 can start communicating with satellites as they move overhead. Availability of
satellites is highly dependent on regional location and how busy a satellite currently is; that is, the
availability of slots.
Figure 1: SCO Report Transmission Cycle
To transmit a message through the Digi m10 to the satellite, a user must create a message and
communicate it serially to the Digi m10. See the section referring to the types of
Communication methods or the available types of messages that can be sent. At this time,
various acknowledgement and priority levels can be set as well. Once a message has been
queued up for transmission and there is a satellite overhead, the Digi m10 will attempt to transmit
the message to the satellite following the cycle shown in the above figure. When the satellite
accepts the message and transmits to the GES, the message then routes to the specified
destination.