The use of an app allows the KX-PRW130 DECT cordless phone to become an extra handset. It can integrate up to four smartphones by WLAN to the land-line network and also allows phone calls to be made directly on the land-line network by the smartphone. The base station serves as a WLAN repeater and extends the range of the WLAN radio network. In addition, this elegantly designed cordless phone is easy to use. Thus, the base-station keyboard may be used for the answering machine for example.