Connection Between Two Points; System Of One Base Station And Several Substations - Satel SATELLINE-EASy User Manual

Reception addressing has
been set OFF.
The radio modem will
transfer all received
data to the RS-232 -
interface.
10.2.1

Connection between two points

When forming a connection between two points it is recommended that both the reception and
transmission addresses are identical in both radio modems. This is the easiest way to control
addresses and the risk caused by interference from other systems operating in the same area is
minimal.
Example: by setting all addresses of both radio modems to a value ´1234´, they will accept
only those messages which contain this address, and they will use this same value when
transmitting data.
If the channel is reserved for use only by the said network, or if the terminal devices are
responsible for addressing, it is not necessary to use addressing in the radio modems.
10.2.2

System of one base station and several substations

In systems with several substations, the base station must know to which substation each message
is intended, and from which substation each received message originates. Usually terminal
devices handle addressing completely, but it is also possible to use the addressing functionality of
the radio modems.
Reception addressing
been set OFF.
The radio modem
consider the characters of
the address as a part of the
data and will send all the
characters to the RS-232
interface.
76
has Reception addressing
been set ON but there is no
address in the data packet.
will
Data will appear on the RS-
232 interface ONLY if the
first 2 characters of the
data match either of its own
RX address.
modem will remove those 2
characters of data.
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