Importer Plus Technical Instruction Manual Pre-installation tasks
Issue 0.02 2010-03-29 Page 2-5
Network switch. Incorporating a network switch (see Figure 2.1 on page 2-3) ensures that the
connection to the Importer Plus carries only SPS PAD and I2E data, and that the connection to the
digital STL carries only exciter link data, MPS PAD (for the NE IBOC, Exporter or Exporter Plus),
and any traffic for other devices at the transmitter site.
Network bandwidth. It is assumed that the Importer Plus and NE IBOC, Exporter or Exporter
Plus have fixed IP addresses. Because STLs have limited total throughput, the available networking
bandwidth depends on how much of the throughput is being used for audio or other services.
Determining available bandwidth depends on the type of STL and how it is being used.
STL capacity
The required STL capacity on the LAN channel varies based on protocol, service mode and the
number of secondary audio channels. You may require a bandwith of up to 150 kb/s.
IP address information
Since the Importer Plus will be connected to the NE IBOC, Exporter or Exporter Plus over a LAN,
you will need to determine the IP addresses for the Importer Plus, the NE IBOC, Exporter or
Exporter Plus, and the gateway. Consult with your network manager for this information. If they are
to be connected together directly, as shown in Figure 2.1 on page 2-3, the choice of IP address is
arbitrary. For example the following could be used:
• NE IBOC, Exporter or Exporter Plus IP: 10.10.10.10
• Importer Plus IP: 10.10.10.12
• Gateway IP: 10.10.10.2
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