802.11 wireless network site surveying and installation - download pdf or read online

By Bruce Alexander

ISBN-10: 1587051648

ISBN-13: 9781587051647

802.11 instant community web site Surveying and deploy starts with an advent to WLAN architectures and definitions after which strikes directly to web site survey methodologies, supporting you verify and deal with your site's particular wishes. The e-book delves into the set up strategy for WLAN apparatus, together with the principles and laws to which WLANs needs to adhere, a variety of hindrances that come up whilst fitting WLAN apparatus, and how one can attach WLAN items to the stressed out community. 802.11 instant community website Surveying and set up is all the advisor to acting a WLAN web site survey and effectively fitting your 802.11 instant network.This publication is a part of the Networking know-how sequence from Cisco Press, which deals networking execs beneficial details for developing effective networks, knowing new applied sciences, and construction profitable careers.

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Extra resources for 802.11 wireless network site surveying and installation

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In each case, they consume more RF spectrum. Because the overall available RF spectrum (and therefore the number of channels) is limited, you soon run out of frequency spectrum to use. The second method to get more information onto an RF wave is to compress the data. Years ago, a computer modem was able to communicate over your phone lines at 300 baud. Today, a 56-kbps modem gets much higher speeds over the same phone line as the 300-baud modem. This increase in speed results in the modem compressing the data into the same amount of space (or spectrum in the case of RF) and using the same overall bandwidth of the phone line as the 300-baud modem used.

Because there was little multipath interference (few things outside to reflect the radio signal), one antenna was sufficient and communication seemed to be fine. In this case, the customer had used a directional Yagi antenna. This antenna was chosen for its distance characteristics and ease of installation. Later it was determined that coverage was needed on the back nine of the golf course as well. Instead of adding another AP, the customer decided just to connect another directional Yagi antenna to the other antenna port and point it off in another direction (the back nine), as shown in Figure 2-16.

This increase in speed results in the modem compressing the data into the same amount of space (or spectrum in the case of RF) and using the same overall bandwidth of the phone line as the 300-baud modem used. One problem that may arise is that any noise on the phone line will reduce the modem speed. As the data is further compressed, it requires a stronger signal as compared to the noise level. More noise means slower speed for the data to be received correctly. The same is true in radio. As a receiver moves farther from a transmitter, the signal gets weaker, and the difference between the signal and noise decreases.

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802.11 wireless network site surveying and installation by Bruce Alexander

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