User's Manual

Applications
Crescendo UHF Half-Duplex User Manual Page 46 of 78
7.1.3 Multiple Destination Point-to-point Network
Multiple destinations can be used by configuring any number of remote units and then changing the
destination address of the base unit using local command mode. This scenario is shown in Figure 15.
Crescendo
Base
1000
Crescendo
Remote
1001
Main
DTE
RADIO CONFIGURATION
Address: 1000
PROTOCOL CONFIGURATION
Main Port: Point-to-point to 1001 or 1002
SERIAL CONFIGURATION
Main Port: 19200, 8N1, Hardware Flow
DTE
RADIO CONFIGURATION
Address: 1001
PROTOCOL CONFIGURATION
Main Port: Point-to-point to 1000
SERIAL CONFIGURATION
Main Port: 19200, 8N1, Hardware Flow
Main
Crescendo
Remote
1002
RADIO CONFIGURATION
Address: 1002
PROTOCOL CONFIGURATION
Main Port: Point-to-point to 1000
SERIAL CONFIGURATION
Main Port: 19200, 8N1, Hardware Flow
DTE
Main
Figure 15: Multiple destination point-to-point network
The point-to-point destination address on the main port of the base unit determines which remote unit the
base is connected to. To change the point-to-point destination address on main port, the follow these steps:
Enable the local command mode on the main port by transmitting the escape sequence (see section
6.5.3 on page 37).
Use the AT command to change the main port point-to-point destination (ATS52=1001).
Return the port to online state using the online command (ATO).
Other configuration parameters which may help in fine tuning the system operation are:
Rx packetiser timers. See page 18 for more information.
Max packet size. See section 5.3.5 for more information.
Singlecast retries. See page 25 for more information.