Frequently Asked Questions
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FAQ IPS Containers Protective Distribution Systems | PDS Security | IPS Containers & Junction Boxes
| Protective Distribution Systems | PDS Security | IPS Containers & Junction Boxes |
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PROTECTIVE DISTRIBUTION SYSTEMS (PDS) A Protective Distribution System (PDS) is a traditional wire-line, or fiber-optics based telecommunications system that passes through a series of terminals. These systems are mainly found in locations with particular concerns regarding security-sensitive information processing. A complete PDS includes both a subscriber to a processing system, as well as terminal equipment that protects the chosen form of communication system. The purpose of installing a PDS is to deter, detect, or make access difficult to communication lines carrying security sensitive information. A PDS is designed to provide protection to telecommunications processing systems acoustically, electrically, electromagnetically, and physically in accordance with the National Security Telecommunications and Information Systems Security directive No. 7003 (NSTISSI No. 7003). This directive provides nationally recognized standards and safeguards implemented for transmission of encrypted classified information. A PDS will operate under one of two distinctions of distribution classification; a “Hardened Distribution System”, or a “Simple Distribution System.” Within the “Hardened Distribution System designation, there are three varying forms of distribution that provide actual physical protection to communications delivery systems. These three distribution options are a Hardened Carrier PDS, an Alarmed Carrier PDS, or a Continuously Viewed Carrier PDS. 
HARDENED DISTRIBUTION SYSTEMS Hardened Carrier Protective Distribution Systems When a Hardened Carrier PDS is utilized, data cables are installed in a carrier constructed of electrical metal tubing (EMT), ferrous conduit (a tubing system that indicates the presence of iron) or piping, or other approved ridged sheet metal ducting. All connections in a Hardened Carrier PDS are permanently sealed with welds, epoxy, or sealants. Hardened Carrier PDS may be installed below ceilings or above flooring, as well as being buried below ground. If a Hardened Carrier PDS is buried below ground, the carriers must be encased in concrete. Hardened Carrier PDS must periodically undergo visual human inspection. With this being the case, Hardened Carrier PDS located below ceilings or above flooring are preferred due to the fact these installations are more easily visually inspected. Periodic Visual Inspection (PVI) occurs with increased frequency varying on the level of threat to the environment, the security classification of the data being transmitted, and the amount of access to the control area. Alarmed Carrier Protection Distribution Systems Created as a carrier delivery system providing an alternative to Periodic Visual Inspections (PVIs), the Alarmed Carrier PDS automates the inspection process via electronic monitoring with an “alarm” system. These systems are “alarmed” with specialized optic fibers that are deployed within the chosen conduit specifically with the purpose of sensing acoustic vibrations occurring during an attempted intrusion. This vibration would be a result of an intrusion on the conduit in an attempt to gain access to the cables within. The advantages of an Alarmed Carrier PDS over a Hardened Carrier PDS indlude;
Continuously Viewed Carrier Protection Distribution Systems A Continuously Viewed Carrier PDS is under constant observation 24 hours a day, 7 days a week, 365 days a year. Standing orders for a Continuously Viewed Carrier PDS include a requirement that security must investigate any attempt to disturb the PDS within 15 minutes of the initial disturbance. Continuously Viewed Carrier circuits can be grouped together, but should remain separated from non-Continuously Viewed Carrier circuits. SIMPLE DISTRIBUTION SYSTEMS A Simple Distribution Systems offer a much lower level of security protection from a physical aspect than its Hardened Carrier PDS counterparts. These Simple Distribution Systems can also be known as Simple Carrier Systems (SCS). Simple Distribution Systems must meet the following criteria;
NATIONAL SECURITY TELECOMMUNICATIONS AND INFORMATION SYSTEMS SECURITY DIRECTIVE No. 7003
IPS Containers and PDS Junction Boxes
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