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IT Baseline Protection Manual - The Information Warfare Site

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Safeguard Catalogue - Personnel Remarks<br />

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

S 3.12 Informing all staff members about possible<br />

PBX warning notices, warning symbols and<br />

acoustic alarm signals<br />

Initiation responsibility: PBX officer; <strong>IT</strong> Security Management;<br />

personnel committee/works council<br />

Implementation responsibility: <strong>IT</strong> Security Management, Administrators<br />

All staff members should be aware of the meaning of warning notices and/or<br />

symbols and acoustic alarms of the PBX (telecommunications facility). In<br />

particular, this includes the following:<br />

- attention signal for direct voice calling;<br />

- busy override warning signal (trunk offering tone);<br />

- indication of handsfree operation;<br />

- indication of activated direct voice calling;<br />

- indication of automatic call-back; and<br />

- indication/flash in case of an add-on (three-party) conference.<br />

<strong>The</strong> use of features which are not officially authorised can be especially<br />

crucial to <strong>IT</strong> security. <strong>The</strong> warning indicators for these features should be<br />

known to all users.<br />

Additional controls:<br />

- Do the staff know what will happen if somebody makes a busy override<br />

call?<br />

- Do the staff know what will be indicated visibly and audibly by a direct<br />

voice call?<br />

- Is it possible to discern activation of handsfree operation?<br />

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

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

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