The use case is to connect with a Qt Application to a local TCP server (written in Symbian C++).

For this open a TCP/IP connection to the LocalHost with QTcpSocket:

iTcpSocket = new QTcpSocket(this); 
iIpAddress = QHostAddress(QHostAddress::LocalHost).toString(); 
iPort = 9393; 
iTcpSocket->connectToHost(iIpAddress, iPort); 

This works fine as long as the default connection is a valid connection. We can use a valid internet accesspoint or a WLAN ad-hoc accesspoint. And in this way the connection to the local server is successful open the communication to the TCP-Server works.

But if we need just a local connection and do not want to open a connection with a access point i.e without using the connection management (access point, bearer), is not working with this way.