If I understood the question correctly, then the following settings will do what you want.
Using
\tableofcontents[hideallsubsections]
the general ToC shows only the section entries. The settings
\AtBeginSection[]
{
\begingroup
\setbeamertemplate{headline}{}
\addtobeamertemplate{frametitle}{\vskip-1.75ex}{}
\begin{frame}<beamer>
\frametitle{Outline}
\tableofcontents[sectionstyle=show/hide,subsectionstyle=show/show/hide]
\end{frame}
\endgroup
}
will make the partial ToCs (at the beginning of each section) show only the current section and its subsection; the headline is locally suppressed for the partial ToCs and the frametitle is shifted vertically so it starts at the top of the frame.
A complete example:
\documentclass{beamer}
\usetheme{CambridgeUS}
\useoutertheme{infolines}
\author{Co.}
\title{Work Culture}
\AtBeginSection[]
{
\begingroup
\setbeamertemplate{headline}{}
\addtobeamertemplate{frametitle}{\vskip-1.75ex}{}
\begin{frame}<beamer>
\frametitle{Outline}
\tableofcontents[sectionstyle=show/hide,subsectionstyle=show/show/hide]
\end{frame}
\endgroup
}
\begin{document}
\begin{frame}
\frametitle{General Outline}
\tableofcontents[hideallsubsections]
\end{frame}
\section{Test section one}
\begin{frame}
test
\end{frame}
\subsection{Test subsection one one}
\begin{frame}
test
\end{frame}
\subsection{Test subsection one two}
\begin{frame}
test
\end{frame}
\subsection{Test subsection one three}
\begin{frame}
test
\end{frame}
\section{Test section two}
\begin{frame}
test
\end{frame}
\subsection{Test subsection two one}
\begin{frame}
test
\end{frame}
\subsection{Test subsection two two}
\begin{frame}
test
\end{frame}
\subsection{Test subsection two three}
\begin{frame}
test
\end{frame}
\section{Test section three}
\begin{frame}
test
\end{frame}
\subsection{Test subsection three one}
\begin{frame}
test
\end{frame}
\subsection{Test subsection three two}
\begin{frame}
test
\end{frame}
\subsection{Test subsection three three}
\begin{frame}
test
\end{frame}
\end{document}
An image of the general ToC:

An image of one of the partial ToCs (the one at the beginning of the second section):

\setcounter{tocdepth}{1}? – Werner May 02 '14 at 22:42\tableofcontents, nor any\sections or\subsections, which isn't helpful. – Werner May 02 '14 at 22:42\AtBeginSubsection? – Gonzalo Medina May 02 '14 at 22:47