User's Manual

March 1, 2002 Page C7
If the network IP address is registered with its country’s Network Information Center then
the gateway may be nothing more than a conventional router.
If, on the other hand, the network IP address is one of the RFC1597 private addresses the
gateway must be a proxy server of some sort. For example, the gateway may provide
RFC1631 Network Address Translation services.
Additional security measures such as firewalls may be added at the customer’s
option.
DC Power Supply
The DC power supply is located in the equipment room and supplies DC power to operate
all of the ARCi hubs in the installation. In a single sector hub configuration a single power
cable is furnished which has two power connectors on the outside end
1
and is run along
with the signal cables from the hub antenna to the equipment room. In a multi-sector
hub configuration separate power/telemetry cables can be run to the equipment room
from each ARCi Hub, or an Outdoor Junction Box (OJB) can be installed in the vicinity of
the hub antennas (rooftop / tower structure) and a single appropriately sized cable run to
the equipment room. See the
Hub Installation Details section of this manual for more
information.
The electronics in the hub antenna are designed to function with a DC voltage at the hub
nominally 8.5 Vdc +/- 0.5 V.
In a single sector hub the voltage drop on the power cable is calculated and the DC power
supply voltage is set in the equipment room. The current drawn by a single hub (both
transmitter and receiver) is 950 mA +/- 10%.
In a multi-sector hub where an OJB is employed, the power supply remote sense samples
the DC voltage at the distribution terminals within the OJB and returns the sample to the
DC power supply via the DC power sense cable.
See the
Hub Installation Details section of this manual for more information on
recommended power supplies
1
Within a given ARCi hub antenna, the transmit and receive electronics are housed in separate inner
enclosures and have separate power connectors.