Plantronics Calisto Pro Troubleshooting-Common screen icons and warning messages Common screen icons and warning messages: Searching for base: Appears when the handset is not connecting to the base or is beyond range of the base (range is up to 300 feet). Make sure the AC Power adapter and telephone cord are connected. If the problem persists, you may need to re-register the handset with the base (see “Registering your handset with the charging base” on page 40 of the user guide). Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website