Satel SATELLINE-EASy Podręcznik Użytkownika Pobierz pdf (Strona 85)

SATELLINE-EASy Pro

User Guide v.1.5

Järjestelmä Modeemi

Y 1, 2

Z 1, 3

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 use in

the transmission of subsequent reply packets.

11.3.2 Virtual Mode Routing

Please contact SATEL for more information of Virtual Mode Routing.

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Satel SATELLINE-EASy Podręcznik Użytkownika Strona 85