This represents one entry in the cwrRfTable. This table is largely
a read only table which provides details on the state of radio
frequency resources available on the system.
Physically each RF resource may be realized by one antenna
and its associated control hardware. A single antenna and its
associated electronics may act as more than 1 RF resource.
When an RF resource acts as both a transmit and receive resource,
the transmit and receive frequency ranges may overlap.
It is indexed by the ifIndex and cwrRfIndex.