User's Manual
106 Document Number: 0100SM1401 Issue: 12-16
IP Routing - Serial Data PTMP
As serial data uses the embedded device server (or MODBUS Gateway) the data sent over the air can also be routed. The example
below shows a PTMP topology, where the entry point radio is performing the following functions:
- Encapsulating serial data in IP frames.
- Addressing these IP frames to a multicast address.
- Forwarding the multicast frames on to the radio WAN network.
This allows the distribution of the SCADA host’s serial data to be received by all remote radios subscribed to the multicast address
and within the subnet of the radio WAN.
To simplify the example, the Character Layer and Interface setting have been shown as default values. These parameters should
match the configuration of the external serial device you are connecting to the Q data radio’s Serial Port.
Host Application
Serial Data
Remote A
Network Settings:
IP: 192.168.2.1/24
Router Settings:
WAN IP Address: 10.10.10.2/24
Route Table Entries:
192.168.1.0/24 10.10.10.1
224.240.1.1 WAN LAN
Full Duplex Entry Point
Network Settings:
IP Address: 192.168.1.1/24
Router Settings:
WAN IP Address: 10.10.10.1/24
Route Table Entries:
224.240.1.1 LAN WAN
COM1:
Mode: Serial Device Server
Character Layer: 9600,8,N,1
Interface: RS232.
Packet Layer: MODBUS
Protocol: UDP
Protocol Mode: Point to Multipoint
Node Type: Point
Remote Multicast IP: 224.240.1.1
Remote IP Port: 30010
Local IP Port: 30010
Time to Live: Same Site
Remote B
Network Settings:
IP: 192.168.3.1/24
Router Settings:
WAN IP Address: 10.10.10.3/24
Route Table Entries:
192.168.1.0/24 10.10.10.1
224.240.1.1 WAN LAN
Remote A & B (Common)
COM1:
Mode: Serial Device Server
Character Layer: 9600,8,N,1
Interface: RS232.
Packet Layer: MODBUS
Protocol: UDP
Protocol Mode: Point to Multipoint
Node Type: Multi-Point
Remote IP Address: 192.168.1.1
Remote IP Port: 30010
Local Multicast IP: 224.240.1.1
Part G – Quick Start Guide
For detailed information regarding route table entries, refer to the Static Routes section of Part G within this manual.