Call profiles can be set up in any smartphone as well as in modern landline and cordless telephones. Generally, a call profile is configured directly in the address book [contacts] entry of the caller. There, specific actions can be assigned to the telephone number of the participant. For instance, a special ringtone, a particular volume, indication through vibration, or silent mode can be selected for the telephone number. In some devices it is also possible to directly reject particular telephone numbers with the call profile.