Detailed Description Of Message Routing; Source Mode Routing; Virtual Mode Routing; Overhop Function In Source Mode Routing - Satel SATELLINE-EASy User Manual

11.3 Detailed description of Message Routing

11.3.1

Source Mode Routing

The above figure represents a network containing four (4) radio modems. Each radio modem is
given a unique address (0...3). A terminal device has been attached to the three of the four radio
modems and they communicate with each other using terminal addresses X, Y and Z, respectively.
Radio modem 0 and terminal device X together constitute the base station of the network and all
routing information of the network has been programmed into this base station.
When the terminal device X transmits a packet to (e.g.) terminal Y, radio modem 0 will detect the
address Y from the data received through the serial port. From the routing table a route 1,2 can
be found to which the radio modem also adds its own address to define the route for return data.
Radio modem 1 repeats the packet and radio modem 2 removes the address information from
the received data packet thereby transferring only the original data to the serial interface. The
address information received together with the packet is reversed (2, 1, 0) and saved to be used
in the transmission of subsequent reply packets.
11.3.2

Virtual Mode Routing

Please contact SATEL for more information of Virtual Mode Routing.
11.3.3

Overhop function in Source Mode Routing

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SATELLINE-EASy
User Guide, Version 2.3