TODO:
- authors
- change format to A4
- wr bountry clock/ordinary clock/switch


Figure~\ref{fig:hybrid-network} depicts the topology of a \emph{hybrid}
WR/IEEE1588 network.

White Rabbit adds to PTP a mechanism (called \textit{White Rabbit Link Setup}) 
which enables to obtain the value of delay asymmetry. 
The mechanism is active only at the beginning of each WR-to-WR node connection.



\subsubsection{wrPortMode}
TODO ?
\subsubsection{calibrated}
TODO ?
\subsubsection{deltaTx}
TODO ?
\subsubsection{deltaRx}
TODO ?
\subsubsection{calPeriod}
TODO ?
\subsubsection{calPattern}
TODO ?
\subsubsection{calPatternLen}
TODO ?
\subsubsection{wrMode}
TODO ?
\subsubsection{wrAlpha}
TODO ?
\subsubsection{grandmasterWrPortMode}
TODO ?
\subsubsection{grandmasterDeltaTx}
TODO ?
\subsubsection{grandmasterDeltaRx}
TODO ?
\subsubsection{grandmasterWrMode}
TODO ?