Backups can be to any media, it's an open platform. NAS, SAN, Tape, DVD libraries etc. Usually the customer implements their own corporate backup strategy - or we can provide advice.
But the media aren't used as an archive to extend the retention period, and that's the difference.
Many devices out there which state "Dual DVD" etc have a limited amount of storage online and need the media to be replaced every couple of days. To enable a playback of a call from last month means a manual dip into a catalogue of disks, finding the right one and restoring the call. This at the very least is inconvenient and an added time delay in response to to a customer complaint, but is also costly to manage.
Some clients implement upto 13 year retention strategies, that's a lot of DVD s ;-) Others 6-18 months and never have to touch the system for playbacks.
Hope that helps.
James |