Computer Spot

Occasionally, problems may occur with your wireless router. When they do you are likely to lose all or partial access to the internet, and so you will want to resolve them as quickly as possible.

The first thing to do is work out whether you have completely lost access, or whether it is just running very slowly. If it is down completely then it is likely that your internet service provider is having problems and you may not be able to overcome it.

When your net goes down completely your modem will normally display a warning signal in the form of a flashing light, or the absence of the light that normally indicates that the internet is working.

Your router may also display a similar warning-the modem input light may change to red, may flash or may stop showing.

When this happens you can try and reboot both the router and the modem. However if this does not work you are likely to have to wait till your service provider corrects the problem. Read the rest of this entry →

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The range of operation is decided mainly by the access point that you have. The power of your access points would decide on how long or how far off you can carry your laptop or your client desk top from the access point.

The range of operation is normally not set in a fixed way, but is realized when you move away from the access point.

Where there is not enough signal strength for the system to log on and work on the network, it can disconnect from the network. This will be the limitation caused by the location of the wireless network. As a user, you should be aware of these limitations and the maximum you range you can cover at your home.

You might have to reconnect if you go out and come back in. This could spoil any server based work if it is running when you are moving out of the network space or hot spot. Read the rest of this entry →

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Now that the iPad 3G + WiFi has just come out, there are going to be many people wondering what sort of data plan they will have to buy for their new device.

Luckily there are two options, and neither have the crazy contracts that the iPhone does. The first option is a $14.99 per month data plan limited to 250MB, and the second options is a $29.99 unlimited plan.

Both plans also include access to any AT&T hot spot, of which there are 20,000 in the US alone. Regardless of which plan you choose, it will renew on a monthly basis, unless you cancel it.

Cancellation can easily be done right on the iPad itself. The interesting thing is that for billing purposes, AT&T actually gives you a fake mobile number. Along with cancelling, you can also add or modify any data plan right from the device as well. Read the rest of this entry →

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Components that make up your wireless system are simply the two units: one, the wireless router or the access point and two, the wireless card or the connectivity over a WiFi card.

In the case of the access point, you can also connect to an Ethernet network or to a broadband internet line. That is the additional facility that you might have on your wireless router.

On your wireless card, if you have configured with a server allocated IP address, it is easy for your laptop to be placed anywhere and still get connected to any of the servers there, provided they are also configured in the same way.

Dynamic allocation is therefore, the best method for connection where you might move in and out of multiple networks or there are multiple numbers of people who might log in and out of the network. Under all these circumstances you will find that the laptop is better configured and equipped to work at ease with this wireless modem. Read the rest of this entry →

If your selection and choice of equipment are in line with the details provided in the earlier chapters, then the installation of these equipments is going to be done in a jiffy! Let us take a detailed look at how you are going to install your equipment at home and get started!

Follow the steps listed below:

1. Selection of the equipment

You need to select the equipment that matches your needs. Use the selection procedure that has been listed in the earlier chapter.

In addition to that, you might have to collect information from all the vendors or as many vendors as you are comfortable with.

This could be about 3 to 4 vendors so that you have a fair number for comparison. You can also check out the web sites that sell these products. It is easy to collect a quote from these web sites and you can also make a quick comparison of all these products as well.

In addition to these, you need to also ensure that all the short listed equipment meets your needs as listed earlier. You should also check out whether these equipments are in line with the standards. You should be buying, obviously, from only those buyers who meet these standards. Read the rest of this entry →

Placing your Access Points is critical to the performance of the entire wireless network that you install.

Why is this so?

The signal strength is an important constituent that contributes to the success of your wireless network. Every access point has a range that it can cover.

If your house is larger than the range that is specified, you might have to add another access point so that you do have the right signal strength for ease of operation. This will have to be done, even if the area of your house increases and you want coverage over an extended area.

Ideally, you should start with the building plan. You should know where the walls come and where you have other electronic sources that could hurt the signal strength of your access point. But you should also note that though most of the devices based on 802.11b standards claim to cover an area of 300 m, it is safer to plan for 250 m. Read the rest of this entry →

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When you first bring your router home, you can run it straight out of the box. It is often possible to simply plug it into the mains, plug the modem into it and search for the wireless signal. You can connect your computer to it right away with a nice, clean, strong signal and are away!

But then so can everyone else who can see your signal. The problem is that a wireless router will broadcast its presence far and wide, within the limits of it’s signal strength.

If it is in the very middle of your home, then it may not reach far outside but set it next to a wall and you could be providing a free internet service for all of your neighbors. Read the rest of this entry →

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Interaction with a computer requires sight-in order to take in the information from the computer you must be able to read the screen, or see the pictures. To do something as simple as using the mouse you must be able to see the cursor moving around on the screen, so with these obstacles in mind, how can a blind or visually impaired person use a computer?

There are varying degrees of visual impairment. For people with less severe visual problems there are screen magnifiers available that will make the text and the cursor large enough to see.

When the visual impairment is severe enough, this no longer works and other measures are needed. This is where assistive technology comes in, acting as the eyes of the user. Read the rest of this entry →

A wireless system requires you to have a wireless card that does the job of receiving and transmitting data. This is either on your computer or laptop.

Most laptops, as I said earlier, come with the card installed on it. All that you have to do: go to your operating system and enable the card. You can start using it immediately.

Well, this might not be the case with all machines or laptops. Please note that there are also laptops that fitted with Bluetooth and not with WiFi. In these laptops and machines, you need to install the wireless card to get it connected to the access point. Read the rest of this entry →

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For every one of the systems that we discussed earlier there are devices that would enable communication. In case of WiFi equipments too, you will find a number of WiFi equipments that meet your needs.

You need to have an access point which will tie to a static server over an Ethernet network as shown in figure 1.3. Access points are wireless nodes that are configured to receive and transmit wireless RF signals on a network.

It also serves to connect the computers across a network. They also bridge the wired Ethernet network with the wireless systems. Read the rest of this entry →