Action to be executed by the phone.
1. Application update - download system update file
2. Config file export - Upload config file to FTP/TFTP server. It
can then be named and saved.
3. Config file import - Download the config file from FTP/TFTP
server. The configuration will be effective after the phone is
reset.
4. Phone book export (.vcf, .csv, .xml) - Upload the phonebook file
to FTP/TFTP server. It can then be named and saved.
5. PhoneBook import (.vcf, .csv, .xml) - Download phonebook file
Logo file name to be deleted.