modeloConfigSUNAT.xml

 <system.serviceModel>
    <bindings>
      <basicHttpBinding>
        <binding name="SunatDocumentosBinding" closeTimeout="00:01:00" openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00" allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard" maxBufferSize="65536" maxBufferPoolSize="524288" maxReceivedMessageSize="65536" messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered" useDefaultWebProxy="true">
          <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384" />
          <security mode="Transport">
            <transport clientCredentialType="None" proxyCredentialType="None" realm="" />
            <message clientCredentialType="UserName" algorithmSuite="Default" />
          </security>
        </binding>
      </basicHttpBinding>
    </bindings>
    <client>
      <endpoint address="https://www.sunat.gob.pe/ol-ti-itcpgem-sqa/billService" binding="basicHttpBinding" bindingConfiguration="SunatDocumentosBinding" contract="Sunat.billService" name="ServicioSunat" />
    </client>
  </system.serviceModel>