\documentclass{standalone}

\usepackage{tikz}
\usetikzlibrary{backgrounds, positioning, shapes.symbols}
\usepackage{helvet}
\renewcommand*{\rmdefault}{\sfdefault}

\begin{document}
\begin{tikzpicture}
  [
    font=\footnotesize,
    faraday/.style={minimum size=3cm, draw, dashed},
    duplexer/.style={draw,fill=white},
  ]

  \node[faraday, label={[anchor=south east]above right:Faraday cage}] (faraday) {};

  \node[above left=-0.50cm and 2.8cm of faraday, label=above:nepes] (nepes)
    {\includegraphics[width=1.2cm]{server}};
  \node[right=0.3cm of nepes, label=above:B200-mini] (b210o)
    {\includegraphics[width=1.2cm]{b200-mini}} edge (nepes);
  \node[below right=0.35cm of faraday.north west] (anto)
    {\includegraphics[width=0.3cm]{antenna}};
  \draw (b210o) -| node [pos=0.2, duplexer] {B7} (anto);

  \node[below left=-0.50cm and 2.8cm of faraday, label=below:ofqot] (ofqot)
    {\includegraphics[width=1.2cm]{server}};
  \node[right=0.3cm of ofqot, label=above:B200-mini] (b210n)
    {\includegraphics[width=1.2cm]{b200-mini}} edge (ofqot);
  \draw (nepes) -- (b210o);
  \node[above right=0.35cm of faraday.south west] (antn)
    {\includegraphics[width=0.3cm]{antenna}};
  \draw (b210n) -| node [pos=0.2, duplexer] {n78} (antn);

  \draw (nepes) -- (ofqot);

  \node[right=1.5cm of faraday, label=above:RM500Q-GL] (quectel)
    {\includegraphics[height=1.2cm]{quectel}};
  \node[above left=-0.1cm and 0.2cm of faraday.east] (aq2)
    {\includegraphics[width=0.3cm]{antenna}} edge (quectel);
  \node[above=-0.2cm of aq2] (aq1)
    {\includegraphics[width=0.3cm]{antenna}} edge (quectel);
  \node[below=-0.2cm of aq2] (aq3)
    {\includegraphics[width=0.3cm]{antenna}} edge (quectel);
  \node[below=-0.2cm of aq3]
    {\includegraphics[width=0.3cm]{antenna}} edge (quectel);
  \node[right=1cm of quectel, label=above:idefix] (idefix)
    {\includegraphics[width=1.2cm]{server}}
    edge (quectel);

\end{tikzpicture}
\end{document}