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| Application overview
Private networks are deployed where it is vital to have security
or independence from public networks, or where there is no
longer a suitable communications infrastructure to support
operations as a result of natural disaster or conflict. Private
network operators include government agencies; peacekeeping
missions; the military; natural disaster, emergency response
and civil defense organizations; transport infrastructure
and commercial business enterprises. They deploy point-to-point
microwave radio systems where the speed or costs of deployment
for wired, fiber or satellite communications are not commercially
feasible or viable due to distance, difficult terrain or harsh
environments. |
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| Commercial perspectives
Microwave radio delivers private networks the flexibility
to [1] swiftly secure robust, independent communications over
distance and terrain [2] transport vital voice, data and Internet
communications from remote sites back to a backbone network
[3] cost-effectively meet government, commercial or community
imperatives for emergency communications capability. |
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| Aprisa™
digital microwave radios
The 4RF Communications Aprisa digital microwave radios enable
always-on connectivity and the robust transmission of Internet,
voice and data traffic between two fixed points over distances
up to 100 kilometres. They transport data for security, control
and monitoring; voice services including phone, PABX, mobile
radio; and IP traffic such as LAN, VoIP and video. The radios
are typically deployed in remote monitoring applications,
for connection to backbone networks, and access links back
to central command and control locations. |
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| Aprisavantage
The Aprisa radio delivers two key benefits to network operators
requiring secure, robust communications capability, or the
reinstatement of connectivity.
Superior performance Sub 3
GHz licensed frequency bands enable extremely reliable transmission
over long distances and difficult terrain, particularly over
water and partly obscured paths. These regulated bands permit
exclusive frequency assignment guaranteeing carrier-class
performance and minimizing interference. The RF design integrates
high-performance digital processing techniques including FEC
(Forward Error Correction), interleaving, and advanced radio
equalization to minimize transmission degradation from interference
and atmospheric effects. Sophisticated modulation techniques
in the radio platform enable highly efficient transmission
in narrow channels. This enables the optimisation of available
spectrum where that resource may be limited and/ or expensive.
Straightforward integration and flexibility The
design of the Aprisa enables swift network integration and
redeployment. The radio features an in-built multiplexer managing
integrated data, voice and IP traffic, which simplifies deployment
by eliminating the requirement for external equipment. Advanced
plug-in, customer-configurable interface modules facilitate
ease of integration with both legacy and next generation network
elements. The embedded element management applications enable
remote configuration, diagnostics and monitoring; and SNMP
allows straightforward integration to management systems.
These features minimize field service calls, and reduce the
cost of installation and ongoing management supervision.
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| Noted applications
1. Protection from the deadly threat posed by an active volcano
and lahar
overflow
2. Transmission of weather monitoring data for an airforce
meteorological
service
3. Establishing communications for peace-keeping missions
4. Relay of mission-critical monitoring information received
from a satellite
to a rescue response centre
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