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One
of the best ways to handle availability of data from remote sites is to have
alternate communications channels. In particular, these should have no common
points of failure. This includes:
· Physically
separated channels, so that channels in the same microwave link or fiber optic
cable are not considered physically separate. Also entry points into buildings
or sites need to be different.
· Different media,
so that if one type of media suffers a failure, the other type is not affected
(e.g. weather conditions affect radio-based communications)
· Automated
switchover from one communications channel to the other within the performance
requirements of the functions using the channels
Keywords:
Backup, communications
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