Applications
RFI-9256 Radio Modem User Manual
Page 43 of 109
Figure 15: Simplex point-to-point network
Even though user data is only flowing in one direction, there is data being transmitted from the master to the
slave in the form of acknowledgments for each packet received.
The simplex point-to-point network has the same configuration as the basic point-to-point network, except
that now the slave is configured with an outgoing directional bias and the master is configured with an
incoming directional bias.
6.3 Multiple Slave Point-to-point Network
The multiple slave point-to-point network can be expanded to allow two slave units to be connected to a
single master using point-to-point links. This configuration is shown in Figure 16.
RFI-9256
Master
RFI-9256
Slave 1
Main
DT
E
1
Main
DT
E
1
RADIO CONFIGURATION
Unit is a SLAVE
Network Address: 54
Hopping Pattern: 18
Rx Address: 2000
PROTOCOL CONFIGURATION
Main Port: Point-to-point to 1000
SERIAL CONFIGURATION
Main Port: 115200, 8N1, Hardware Flow
RADIO CONFIGURATION
Unit is a MASTER
Network Address: 54
Hopping Pattern: 18
Rx Address: 1000
PROTOCOL CONFIGURATION
Main Port: Point-to-point to 2000
Aux Port: Point-to-point to 3000
SERIAL CONFIGURATION
Main Port: 115200, 8N1, Hardware Flow
Aux Port: 9600, 8N1, No Flow
RFI-9256
Slave 2
Aux
DT
E
2
RADIO CONFIGURATION
Unit is a SLAVE
Network Address: 54
Hopping Pattern: 18
Rx Address: 3000
PROTOCOL CONFIGURATION
Aux Port: Point-to-point to 1000
SERIAL CONFIGURATION
Aux Port: 9600, 8N1, No Flow
Aux
DT
E
2
Figure 16: Multiple slave point-to-point network
In this scenario, the radios are configured in the same way as for the basic point-to-point network, however
now the auxiliary port must be configured in point-to-point mode and given the destination address as the
address of slave 2. This allows all data transmitted on DTE1 on the master to be received by DTE1 on slave
