【多选题】
Acme Booster Corporation has a corporate policy stating that all routing devices will have their configurations backed up to a corporate server on a weekly basis. Their CUE module is a component of the Cisco CallManager Express device. Which three parameters will ensure successful backup of the CUE module configuration?（）
A、ATFTP server must be present and available to the CUE module.
B、The CUE module must have modify permissions on the backup server directory.
C、The CUE module must be in an offline mode prior to instituting the backup.
D、An FTP server must be present and available to the CUE module.
E、The CUE module must copy the configuration and messages to separate directories on the backup server.
F、The CUE module must have read and write permissions on the backup server directory.
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