Consumers Of Two-Way Radio Batteries are Pleased With New Choices and Lower Prices

Written by Cut-Rate Batteries

Continued from page 1

Cut-Rate Batteries has come ontorepparttar scene with a completely different model. Even after shaving prices down -- sometimes by as much as 70% -- it still is able to back its high-quality batteries with a full, 12-month warranty and 100% money back guarantees.

It's a good mix and business consumers have wasted no time showing loyalty to their new bottom line.



Monika Wencek, Media Relations Cut-Rate Batteries, LLC Forest Lake, MN (P):651-204-9990

It is a joint effort of the Media Relations specialist and the webmaster

Optical Wireless Security

Written by Lightpointe Communications

Continued from page 1

The interception of optical wireless systems operating with narrow beams inrepparttar infrared spectral wavelength range is far more difficult. In fact, military organizations or government entities that rely heavily on extremely secure transmission technologies were amongrepparttar 139080 earliest users of optical wireless communication systems as a way to avoid signal interception. Therefore, it is understandable whyrepparttar 139081 study of FSO technology in military labs and security agencies dates back several decades. Inrepparttar 139082 early days of FSO development,repparttar 139083 ability to transmit information at high data rates was actually a less important factor thanrepparttar 139084 fact that FSO technologies offered one ofrepparttar 139085 easiest and most secure ways to exchange information between remote locations. The small diameter ofrepparttar 139086 beam of typically only a few meters in diameter atrepparttar 139087 target location is one ofrepparttar 139088 reasons why it is extremely difficult to interceptrepparttar 139089 communication path of an FSO-based optical wireless system: The intruder must knowrepparttar 139090 exact origination or target location ofrepparttar 139091 (invisible) infrared beam and can only interceptrepparttar 139092 beam withinrepparttar 139093 very narrow angle of beam propagation. Even more difficult,repparttar 139094 intruder must have free and undisturbed access torepparttar 139095 installation location ofrepparttar 139096 optical wireless transceiver and be able to install electronic equipment without being observed. Inrepparttar 139097 majority of cases,repparttar 139098 installation location does not allow free access to a potential intruder becauserepparttar 139099 installation location is part ofrepparttar 139100 customer premise such asrepparttar 139101 roof or an office (when optical wireless equipment is installed behind windows).

The direct interception of an optical wireless beam betweenrepparttar 139102 two remote networking locations is basically impossible becauserepparttar 139103 beam typically passes throughrepparttar 139104 air at an elevation well above ground level. Due torepparttar 139105 fact thatrepparttar 139106 transmission beam is invisible and that any attempts to blockrepparttar 139107 beam would occur nearrepparttar 139108 optical wireless equipment terminus points,repparttar 139109 transmission process imposes another obstacle. Picking uprepparttar 139110 signal from a location that is not directly located withinrepparttar 139111 light path by using light photons scattered from aerosol, fog, or rain particles that might be present inrepparttar 139112 atmosphere is virtually impossible because ofrepparttar 139113 extremely low infrared power levels used duringrepparttar 139114 optical wireless transmission process. The main reason for excluding this possibility of intrusion isrepparttar 139115 fact that light is scattered isotropically and statistically in different directions fromrepparttar 139116 original propagation path. This specific scattering mechanism keepsrepparttar 139117 total number of photons orrepparttar 139118 amount of radiation that can potentially be collected onto a detector that is not directly placed intorepparttar 139119 beam path well beyondrepparttar 139120 detector noise level

Summary Optical wireless communication systems are amongrepparttar 139121 most secure networking transmission technologies. Unlike microwave systems, it is extremely difficult to interceptrepparttar 139122 optical wireless light beam carrying networking data becauserepparttar 139123 information is not spread out in space but rather kept in a very narrow cone of light. To intercept this invisible light beam,repparttar 139124 intruder must be able to obtain direct access torepparttar 139125 light beam. Due torepparttar 139126 very narrow beam diameter, interception ofrepparttar 139127 beam can virtually only be accomplished atrepparttar 139128 customer premise whererepparttar 139129 system is installed. At that point, it would be certainly easier for an intruder to plug directly intorepparttar 139130 network by usingrepparttar 139131 existing copper-based infrastructure (e.g. unplug a CAT 5 networking cable and plug it into a laptop). Scattered light can not be used as a method of interception. Moreover, higher protocol layers can be used in conjunction with layer one optical wireless physical transport technology to encrypt sensitive network information and provide additional.

Lightpointe are a pioneer in the development of Optical Wireless products based on free-space optics (FSO) technology. Lightpointe's wireless solutions are installed and supported in the UK by WAN Partnership Ltd. For more information and discussion about Wireless technologies please visit

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