S&C SpeedNet SDR 1, Instruction Sheet, Page: 11 / 16

S&C Instruction Sheet 1075-510
11
Installation
Table 5. OSI Model
Data Unit Layer Function
Host IED
(Intelligent
Electronic Device)
Layers
Data
Application
Network process to application
IntelliRupter® PulseCloser® Fault Interrupters/
IntelliTeam® Automatic Restoration System
Presentation Data representation and encryption
Session Interhost communication
Segments Transport
End-to-end connections and reliability
(UDP/TCP)
Media
SpeedNet SDR
Radio
Packets Network Path determination and logical addressing (IP)
Frames Data Link Physical addressing (MAC and LLC)
Bits Physical Media, wireless, fiber optics, and wire
Network Example Use of private IP addresses is strongly recommended when configuring a SpeedNet SDR
Radio network. The following example of a SpeedNet SDR Radio network uses several
private IP subnets from the 192.168.0.0 block of private addresses.
The SpeedNet SDR Radio network, depicted in Figure 1, contains three Ethernet seg-
ments. The first segment uses the 192.168.200.0 Class C subnet, encompassing a range of
addresses from 192.168.200.1 to 192.168.200.254. The second segment uses the 192.168.201.0
Class C subnet, encompassing a range of addresses from 192.168.201.1 to 192.168.201.254.
The third segment uses the 192.168.202.0 Class C subnet, encompassing a range of addresses
from 192.168.202.1 to 192.168.202.254. All three radios share the 192.168.203.0 Class C subnet
for their wireless interfaces. It is over this common subnet that traffic is routed between
Ethernet segments.
SpeedNet SDR 1
192.168.203.1
SpeedNet SDR 2
192.168.203.2
SpeedNet SDR 3
192.168.203.3
192.168.200.1 192.168.201.1 192.168.202.1
192.168.200.2
192.168.201.2 192.168.202.2
Radio Network
Figure 1. Multi-network using SpeedNet SDR Software Defined Radios.