Method of controlling call routing and a communication terminal

A method of controlling call routing via a communications network to a communication terminal (MT), which terminal is suitable for communicating, in a first mode,

• via a first radio interface (RI1) with radio network base stations (DECTS) of the communications network, and for communicating, in a second mode, via a second radio interface (RI2) with a mobile radio network (MN) of the communications network,
• wherein an Intelligent Network (IN) server unit (SERV′) of the communications network checks subscriber data stored in the mobile radio network (MN) as to whether the terminal (MT) is recorded there as attached or detached, and activates call forwarding to the selected radio network base station (DECTS) if the terminal (MT) is recorded as being detached;
• and further comprising the steps of
• translating, in said Intelligent Network (IN) server unit, a network call number (N1) of a communication request directed to the terminal into a mobile call number (N2) of the terminal,
• determining, in the terminal (MT), whether it has moved into a range covered by radio network base stations, and if it has moved into a range (RADECT) covered by a selected radio network base station (DECTS), initiating, by signalling via the mobile radio network (MN) to said Intelligent Network server unit (MSC, HLR), a switch-over of network-side routing of connection requests, which are directed to the terminal (MT) by sending an identification of said selected radio network base station and sending a detach message which activates call forwarding to said base station, and
• routing said connection requests via the selected radio network base station (DECTS), thereby facilitating communication in said first mode.