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RFI-9256 Radio Modem User Manual Page 41 of 96
Each segment of the network consists of a master that is either connected to a DTE or to a slave that is on
another segment of the network. The transmissions from master 1 will be output on the main port of slave 1,
and thus be re-transmitted by master 2. In a similar fashion data received by master 2 will be output on its
main port and thus retransmitted by slave 1 back to master 1.
5.7 Hayes Dial-up Networking
The simplest form of Hayes dial-up networking is shown in Figure 16.
RFI-9256
Master
RFI-9256
Slave 1
Main
DTE
Main
DTE
RADIO CONFIGURATION
Unit is a MASTER
Network Address: 19
Hopping Pattern: 3
Local Address: 1000
PROTOCOL CONFIGURATION
Main Port: Hayes Dial-up
SERIAL CONFIGURATION
Main Port: 115200, 8N1, Hardware Flow
RFI-9256
Slave 2
Main
DTE
RADIO CONFIGURATION
Unit is a SLAVE
Network Address: 19
Hopping Pattern: 3
Local Address: 2000
PROTOCOL CONFIGURATION
Main Port: Hayes Dial-up
SERIAL CONFIGURATION
Main Port: 115200, 8N1, Hardware Flow
RADIO CONFIGURATION
Unit is a SLAVE
Network Address: 19
Hopping Pattern: 3
Local Address: 3000
PROTOCOL CONFIGURATION
Main Port: Hayes Dial-up
SERIAL CONFIGURATION
Main Port: 115200, 8N1, Hardware Flow
Figure 16: Hayes dial-up network
A single master unit can dial either slave 1 or slave 2. Either slave can dial the master unit.
Example dial strings from the master are:
 ATD200001<CR> : Dial the auxiliary port of slave 1 (address 2000, extension 01).
 ATD300092<CR> : Dials the internal menu system of slave 2 (address 3000, extension 92).
An example dial string from slave 1 is:
 ATD 100000<CR> : Dial the main port of the master (address 1000, extension 00).