what is an advantage to an alarmed carrier pds over a hardened carrier pds?

A protective distribution organisation (PDS), also chosen protected distribution system, is a United states of america government term for wireline or fiber-optics telecommunication system that includes terminals and adequate acoustical, electric, electromagnetic, and physical safeguards to permit its employ for the unencrypted manual of classified data. At 1 time these systems were called "approved circuits".

A complete protected distribution system includes the subscriber and concluding equipment and the interconnecting lines.

Description [edit]

The purpose of a PDS is to deter, discover and/or make hard physical access to the communication lines carrying national security data. A specification called the National Security Telecommunication and Information Systems Security Teaching (NSTISSI) 7003 was issued in December 1996 past the Committee on National Security Systems.^[ane] Blessing authority, standards, and guidance for the design, installation, and maintenance for PDS are provided by NSTISSI 7003 to U.South. government departments and agencies and their contractors and vendors. This instruction describes the requirements for all PDS installations within the U.S. and for low and medium threat locations outside the U.S. PDS is commonly used to protect SIPRNet and JWICS networks. The document superseded one numbered NASCI 4009 on Protected Distribution Systems, dated Dec 30, 1981, and part of a document called NACSEM 5203, that covered guidelines for facility design, using the designations "cerise" and "black".^[1]

There are 2 types of PDS: hardened distribution systems and uncomplicated distribution systems.

Hardened distribution [edit]

Hardened distribution PDSs provide meaning physical protection and can be implemented in iii forms: hardened carrier PDSs, alarmed carrier PDSs and continuously viewed carrier PDSs.

Hardened carrier [edit]

In a hardened carrier PDS, the data cables are installed in a carrier constructed of electrical metallic tubing (EMT), ferrous conduit or pipe, or rigid sheet steel ducting. All of the connections in a Hardened Carrier System are permanently sealed completely around all surfaces with welds, epoxy or other such sealants. If the hardened carrier is buried under ground, to secure cables running betwixt buildings for case, the carrier containing the cables is encased in concrete.

With a hardened carrier system, detection is accomplished via homo inspections that are required to be performed periodically. Therefore, hardened carriers are installed beneath ceilings or above flooring so they tin can be visually inspected to ensure that no intrusions have occurred. These periodic visual inspections (PVIs) occur at a frequency dependent upon the level of threat to the environment, the security classification of the data, and the access control to the area.

Alarmed carrier [edit]

As an alternative to conducting homo visual inspections, an alarmed carrier PDS may exist constructed to automate the inspection process through electronic monitoring with an alarm organisation. In an Alarmed Carrier PDS, the carrier organization is "alarmed" with specialized optical fibers deployed inside the conduit for the purpose of sensing audio-visual vibrations that usually occur when an intrusion is being attempted on the conduit in order to gain admission to the cables.

Alarmed carrier PDS offers several advantages over hardened carrier PDS:

1. Provides continuous monitoring 24/7/365
2. Eliminates the requirement for periodic visual inspections
3. Allows the carrier to be hidden above the ceiling or below the floor, since periodic visual inspections are not required
4. Eliminates the need for the welding and epoxying of the connections
5. Eliminates the requirement for concrete encasement outdoors
6. Eliminates the need to lock down manhole covers
7. Enables rapid redeployment for evolving network arrangements

Legacy alarmed carrier systems monitor the carrier containing the cables being protected. More than advanced systems monitor the fibers within, or intrinsic to, the cables existence protected to plow those cables into sensors, which detect intrusion attempts.

Depending on the government organization, utilizing an alarmed carrier PDS in conjunction with interlocking armored cablevision may, in some cases, let for the emptying of the carrier systems altogether. In these instances, the cables being protected tin can be installed in existing conveyance (wire handbasket, ladder rack) or suspended cabling (on D-rings, J-Hooks, etc.).

Continuously viewed carrier [edit]

A Continuously Viewed Carrier PDS is 1 that is under continuous observation, 24 hours per day (including when operational). Such circuits may be grouped together, but should be separated from all non-continuously viewed circuits ensuring an open up field of view. Standing orders should include the requirement to investigate any endeavour to disturb the PDS. Appropriate security personnel should investigate the area of attempted penetration within xv minutes of discovery. This type of hardened carrier is not used for Top Hugger-mugger or special category information for non-U.Due south. UAA.^{[ clarification needed ]} UAA is an Uncontrolled Access Area (UAA). Like definitions include Controlled Admission Area (CAA) and Restricted Access Area (RAA). A Secure Room (SR) offers the highest degree of protection.

Therefore, from the least protected (least secure) to the nigh protected is as follows:

UAA RAA CAA SR

Uncomplicated distribution [edit]

Simple distribution PDSs are afforded a reduced level of physical security protection as compared to a hardened distribution PDS. They use a simple carrier system and the post-obit means are acceptable under NSTISSI 7003:

1. The data cables should be installed in a carrier
2. The carrier can be constructed of whatever textile (e.g., forest, PVT, EMT, ferrous conduit)
3. The joints and access points should exist secured and be controlled by personnel cleared to the highest level of data handled past the PDS
4. The carrier is to be inspected in accordance with the requirements of NSTISSI 7003

See likewise [edit]

• National Information Systems Security Glossary

References [edit]

1. ^ ^{a b} "Protective distribution system" (PDF). National Security Telecommunication and Information Systems Security Instruction number 7003. Committee on National Security Systems. December xiii, 1996. Archived from the original (PDF) on July 13, 2006. Retrieved October 2, 2013.

•  This article incorporates public domain material from the General Services Assistants document: "Federal Standard 1037C".

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Source: https://en.wikipedia.org/wiki/Protective_distribution_system

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