IT Baseline Protection Manual - The Information Warfare Site

Safeguard Catalogue - Communications Remarks
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S 5.1 Removal, or short-circuiting and grounding,
of unneeded lines
Initiation responsibility: Head of Site/Bldg Technical Service
Implementation responsibility: Administrator; Site/Bldg Technical Service
It is advisable to remove unnecessary lines. If this is not feasible due to the
resulting disruption of operations (opening of ceilings, window-sill and floor
ducts), the following measures are useful:
- marking those lines which are not needed in the review documentation and
deleting the entries in the documentation kept in the distributor;
- opening of all strap connections and crosscuts of free lines in the
distributors (to the extent possible);
- short-circuiting the free lines at both cable ends and in all affected
distributors;
- grounding of free lines (ground connection) at both cable ends and in all
affected distributors. If this causes ground-induced ripple pickup, singleend
grounding will be sufficient;
- ensuring that lines no longer needed will be removed when other relevant
work is carried out.
Additional controls:
- Who decides on the need for lines and on the required reserves?
- Who verifies proper short-circuiting and grounding?
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IT-Baseline Protection Manual: Oktober 2000