Cordless phones have made significant advances in recent years and have given land lines staying power in the face of the growth of mobile phones. Increases in range is one of the best new technologies. The 1st cordless phones could barely leave the room they started in. Today's phones can keep a clear signal in the next door neighbor's house.
Other features such as voicemail, caller ID, intercom functions, and others have made the cordless phone especially successful, especially in the work place.