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IT Baseline Protection Manual - The Information Warfare Site

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Safeguard Catalogue - Communications Remarks<br />

____________________________________________________________________ .........................................<br />

S 6.26 Regular backup of PBX configuration data<br />

Initiation responsibility: PBX officer<br />

Implementation responsibility: Administrators<br />

Regular backups must be made of the data stored in the PBX<br />

(telecommunications facility). This can be done by means of an internal or<br />

external tape drive. <strong>The</strong> backup cycle decisively depends on the number of the<br />

executed administration processes. As an example of a reasonable frequency,<br />

data backup after approx. 50 administration activities can be assumed. On the<br />

basis of the very common rate of one change per subscriber and year, a<br />

resultant backup cycle of one month can be established for 600 subscribers. In<br />

addition to these regular backups, data should also be saved after any<br />

fundamental changes have been made.<br />

Additional controls:<br />

- Are regular data backups made?<br />

- Can the PBX (telecommunications facility) be started-up correctly by using<br />

the existing data backups?<br />

- Have appropriate tests already been carried out?<br />

- Are the backup tapes held in safe storage?<br />

____________________________________________________________________ .........................................<br />

<strong>IT</strong>-<strong>Baseline</strong> <strong>Protection</strong> <strong>Manual</strong>: Oktober 2000

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