In one aspect a communication terminal comprising a first interface, a
second interface is provided, and a connection unit. The first interface
for connecting to a first network for the bidirectional transmission of
information between the first interface and a central communication
device, arranged in a first network. The second interface allows a link
can be establishment with a radio network. The communication terminal is
established as a base station for the radio network, when the connection
unit is activated. The radio network is a WLAN.