The Messaging server backs up Messaging data over the customer LAN to an external FTP server. This data can be backed up at the same time as the server data or independently. In the event of a system failure, the information stored on the external server is used to restore the system. Messaging data backup may easily reach 50 Gigabytes or more. Customers may be unable to support transfers of single files of this size. Hence, Messaging data backup consists of multiple files, small enough to be transferred in a customer environment.
Messaging supports the File Transfer Protocol (FTP), Secure File Transfer Protocol (SFTP), and Session Control Protocol (SCP) backup methods. The system administrator who is administering network backups needs to be aware of the possible file storage sizes and the limitations of the storage size on the customer data network.
A system administrator can limit the user mailbox size of storage so that users do not have more than 10 minutes of voice storage in the mailbox. A system administrator can also limit the number of days a message can remain in a mailbox before the message is deleted. Currently, the system default is 45 days, that is, a message remains in the mailbox for 45 days before being deleted. The system automatically deletes messages during the nightly audits after the message age equals the administered number of days.