FAQ (Frequently Asked Questions)

    * General
    * Coverage
    * Capacity
    * Performance
    * QoS
    * Security
    * Hardware
    * Mobility
    * AWMS
    * Network Deployment Considerations
    * More Q&As on Network Security
    * Appendix - AWMS configuration Requirement

In Pinellas, the $3.1-million grant from the U.S. Department of Housing and Urban Development will be divided among 12 agencies. The grant is 27 percent higher than the amount awarded last year.” If we had not gotten funded, then all of the programs would have been in very deep trouble," said Sarah K. Snyder, executive director of the Pinellas County Coalition for the Homeless. "Some of them might have been closed down.” Hillsborough County received $3.6-million, which will fund 20 programs operated by different service providers, including the Salvation Army, Alpha House and the Tampa Housing Authority. The grant award is slightly less than last year is because it supports only existing programs, said Lesa Weikel, a spokeswoman for the Homeless Coalition of Hillsborough County. According to an annual survey conducted by the Pinellas County Coalition for the Homeless last year, 5,195 people in Pinellas County are homeless. That is a 10.5 percent increase from the year before. The next count will be done at the end of this month.

Essay is not only a catalogue of a person’s knowledge, information and ideas but it is a person’s response to that knowledge, information or ideas.

What is F/B?

F/B stands for Front-to-Back Ratio. It is the ratio (in dB) between the forward gain to the gain off the rear of the wireless antenna. The forward gain is the peak gain on the main lobe of the wireless antenna. The gain off the rear may be defined as the gain at exactly 180 degrees from the main lobe, or it may be defined as the average or peak gain from 90 degrees to 270 degrees from the main lobe. The second definition of rear gain is the best to use. A F/B of 10-15 dB is considered fair or poor. A F/B of 15-20 dB is considered good, and F/B of 20-30 dB is very good. F/B above 30 dB is superior!

What Antenna Polarization should I use?

Most Point-to-Multipoint Wireless LAN systems use V-Pol (vertical polarization). This allows the use of inexpensive vertical omnidirectional wireless antennas. Higher-density areas are beginning to use more H-Pol (horizontal polarization) antennas for PtMP. Point-to-Point (backhaul) systems may use either vertical or horizontal polarization as long the same polarization is used at each end. Horizontal polarization may perform slightly better when transmitting through a forested area, otherwise there is very little difference in propagation effects. Most standard Telex Wireless antennas are vertical polarization except -H versions of the dish antennas and the 2445AA sector antenna. The 2401 patch antenna may be mounted for either polarity.

Will CP (Circular Polarization) help my system?

Normally, a wireless LAN or wireless ISP has a set of channels or frequency sets that are either vertically-polarized or horizontally-polarized, or some of each. Since the Circular Polarized wireless antenna responds (theoretically) equally to either polarization at a level of 3 dB down from maximum signal, there is not much reason to add CP to a system that already has vertical, horizontal or both polarizations. This won't gain additional spectrum for the wireless ISP. Polarization discrimination is generally a good thing, and CP wireless antennas have no discrimination against linear-polarized signals or interference. However, CP wireless antennas do work well in situations where the polarization is not pure vertical or pure horizontal, such as in downtown areas with lots of multiple reflections from buildings, airborne applications, over-water systems and indoor applications where the client antenna can be either vertical or horizontal or anywhere in between (such as a laptop or PDA antenna). The 2405 circular polarized, ceiling-mount wireless antenna works great in these indoor situations.

Like many would-be 802.11b hackers, I'm increasingly obsessed with pushing more bits further and faster for less cost (I believe the unofficial goal of our community wireless project is to provide infinite bandwidth everywhere for free. Of course, there are problems with  approaching infinity, but it's still fun to try!)

The work that Andrew Clapp and others have done is helping to demystify the ancient black magick of Resonance (i.e. antenna building). And so, over last weekend, some friends and I decided to give it a go for ourselves.

(standard disclaimer): Anything you do with your gear is YOUR RESPONSIBILITY. This is a stupid idea that will probably ruin your radio, set your house on fire, bring the FCC to your door, ruin your crops, and send famine and pestilence across the land. And as the operator, it is YOUR RESPONSIBILITY to not take the word of some raving lunatic on the web with funny colored hair, and find things out for yourself. Your mileage will vary. I'm probably lying. You have been warned.

Anyway, our first run was a direct rip-off of Andrew Clapp's terrific original design (knowing next to nothing about antenna construction, it's helpful to start off with a working known good.) By using PVC, all-thread, washers, some cheap copper tubing, a Pringles can, and some scrap cardboard, we were able to make a prototype shotgun yagi in a matter of hours. Having a couple of other excited alpha geeks around can help move construction projects along very quickly.

by:

Rob Flickenger
Jul. 05, 2001 05:20 PM
Permalink

The very last step is to add an IP address for the MikroTik router to use. Click on ‘IP’ and then ‘Addresses’ and add a new IP address by clicking the ‘+’ button. In the ‘Address’ field, you may type in the IP address of your choice (for this example we will use ‘192.168.10.1/24’ and in the ‘Interface’ field, select ‘bridge1’ Click ‘Apply’ and ‘OK’

That’s it! You have successfully created a WDS network between two or more Access Points. Each Access point in this WDS network will be setup EXACLTY the same way as I have show here. The only thing that will change from Access Point to Access Point is the IP address. In short, all SSID’s, Frequencies, Bands, Bridges, etc will be identical between different Access Points, apart from the IP Address.

If Windows ever notifies you about a weak signal, it probably means your connection isn't as fast or as reliable as it could be. Worse, you might lose your connection entirely in some parts of your home. If you're looking to improve the signal for your wireless network, try some of these tips for extending your wireless range and improving your wireless network performance.

Turn your standard WIFI antenna into one just like the $30 range extender antennas for about 5 cents! Follow these easy steps, and then check out the video if you need extra clarification. Digg if you like my very first Instructable.