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Application Guidelines
Establishing an IP Address
IP addresses and subnet masks are established by the user locally at the terminal interface. IP
addresses are stored in SC-IP nonvolatile memory and retained when there is no power to the card.
In setting up the SC-IP, individual IP addresses are required for the T1/DDS interface, the modem
interface, and the Ethernet (LAN) interface. Each IP address is associated with a subnet mask which
further subdivides a standard class address for routing within an organization. A station submask
indicates the bits used for network identification. A sending station checks the bits to see if the
receiving station is on its LAN or a remote. For a remote, the sending station selects a default router
from an internal table.
From the factory, the SC-IP's modem interface is pre-configured with a default address of
192.168.11.220 with a subnet mask of 255.255.255.000 for initial remote dial-in. For the other
interfaces, the factory default is no IP addresses or masks.
INCOMING
IP TRAFFIC
Figure A-1
076R200-000
Issue 2
DEFAULT ROUTER
IP DESTINATION:
191.254.2.1
(NOT LOCAL)
Using Subnet Masks
SpectraComm IP Router Card
Installation and Operation Manual
LOCAL
NETWORK
189.254.0.0
189.254.2.1
189.254.2.4
IP Addresses
A-5
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