With cordless telephony, the handset is connected to a local base via radio technology. Cordless telephony is therefore different from mobile telephony. Although the cordless phone does make the user mobile, he is limited to the range of his base. Cordless phones have a range of about 30 meters inside buildings and about 100 meters outdoors. For the greatest possible range, the local base should be placed in a central location. The base is connected to the network provider's analogue or digital telephone connection or a router. Depending on the model, several handsets can be used with one base. If several handsets are connected to the base, the different handsets can be used as an intercom without using the external telephone network. In this case the base takes on the function of a central telephone system. The base can typically also be used to charge the handset.