### Backup Using the IP Telephone File Server Application as a File Server

This operation provides periodic back up of FTP data to a primary and/or secondary server running the file server application software. The data can be backed up every month/day/hour or minute, the latter used normally for testing.

The FTP data backup operation acts like the TFTP firmware distribution, but in reverse. The backup process works by the IP Telephone File Server Application building a list of the files in its FTPdata subdirectory and issuing a request to the file server to GET these files. The file server then issues multiple HTTPS “GET requests” back to the client to collect the backup list and all the files the list contains. Only new or newer files are downloaded and stored in the file server BackUp directory.

Automatic FTP data recovery is provided to the end user. When the telephone makes a request to the FTP server and that server is not there for some reason, the local IP Telephone File Server Application server will make a request to its designated Primary, then Secondary file server to see if the file is available there. If found, the file is downloaded and stored locally before being served to the local customer. This mode of operation can also help to deliver personal phone data to users who roam in a corporate network and log in elsewhere, provided a Uniform dial plan is used.

To use the backup feature, you must assign a number of configuration items:

1. Choose the mode for each given IP Telephone File Server Application server (client or file server).
2. Enable the FTP Backup option in the INI setting.
3. Assign a primary and optional secondary file server address in each IP Telephone File Server Application client.
4. Select the frequency of update. The default is hourly.

To check the backup operation, place a file in the FTPdata subdirectory and check that it is received and stored in the Backup directory of the designated file server.