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port on the Smart-Net Gateway. The devices will automatically be detected and no
additional configuration is necessary.
There are a few points to keep in mind when installing a Smart-Net Network:
•Polarity – The Smart-Net network uses standard RJ-11 connectors to make it
easy and convenient to wire and extend. If standard telephone cable is used, it is
important to ensure that it is not of a “flipped” type. The cable must be “straight-
through”, that is pin 1 on one end of the cable must conduct directly to pin 1 on
the other end of the cable. The same goes for all the pins on the cable.
•Topology – The recommended topology of wiring devices in the Smart-Net
Network is in a “daisy chain” fashion. That is, each additional device should
extend from the last device on the network. Wiring the network this way will
ensure reliable communication and the longest distances. Branching off to other
groups of Smart-Net devices from one point will cause signal errors and greatly
deteriorate the reliability and maximum distance of the network.
•Cable Grade – Using Category 5 or Category 6 wire will support the longest
distances with minimal communication errors. However, if the network is very
short, lower grade cable may be used.
Configuring an IP Address
When the Smart-Net Gateway has been powered up for the first time, it will attempt to
retrieve an IP Address with DHCP. If a DHCP server is unreachable, it will set a default
IP Address of 169.254.x.x (where x.x is the last two bytes of the Smart-Net Gateway’s
MAC Address) with subnet mask 255.255.0.0. The device will also listen to a Multicast
group at 224.0.10.10 on port 6082.
Using the IPGatewaySetup Java Utility
The supplied Java program, “IPGatewaySetup”, will configure Smart-Net Gateways via
the Multicast group described above. When changes are made to a Smart-Net Gateway
with this utility, DHCP will be automatically disabled to ensure your configuration
changes take effect. To configure the IP Address with the IPGatewaySetup Java Utility,
perform the following steps:
1. Connect the Smart-Net Gateway to the same networking hardware as a PC with
the Java Virtual Machine runtime environment installed.
2. Power on the Smart-Net Gateway and wait about one minute for it to initialize.
3. Run the program “IPGatewaySetup” on the PC.
•For example, on Windows, open a command prompt, change to the directory
where “IPGatewaySetup” is installed, and type:
java –cp . IPGatewaySetup
