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Wireless Communication

This rapidly growing segment of the communication industry has the potential of providing high-speed high-quality information exchange between portable devices. Wireless communication enables several applications including multimedia Internet-enabled cell phones, automated highway systems, smart homes and appliances and videoconferencing, among others.

4,616 Questions

What percent of kids have cell phones?

The majority of kids in the US have cell phones. Since the question was asked in 2008, costs of cell phones have dropped to point where price is not a barrier to owning them.

How does two-way radio work?

If the Motorola were actually a CB radio, it would be able to - the brand name doesn't matter, they all transmit on the same frequencies. However, Motorola does not manufacture any radios which transmit on the 11 metre Citizens Band.

How many watts is 9 amps?

You cannot "convert" 9 amps in watts. Amps are a unit of electric current, and watts are a unit of electric power.

Power is given by

P = IV

where P is power, I is current and V is voltage. To determine the power (or wattage) you must know both the current and voltage.

How do you call a UK landline from your new zealand mobile?

most of New Zealand mobile phone numbers start with:

  • 021 (vodafone network)
  • 027 (telecom network)
  • 022 (2degrees network)

So when calling from the UK you would drop the FIRST '0' from the 021, 027, or 022:

  • 0064 21 (vodafone network)
  • 0064 27 (telecom network)
  • 0064 22 (2degrees network)

(the number 0064 is the New Zealand country area code, which is for ALL mobiles and home lines)

Should kids under 16 have a cell phone?

yes. yes because there could be certain emergencies that they could use their cell phones for.

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Alternatively, I think it would be reasonable to allow the cell phones, but require them to have the ringer turned off, so that they don't disrupt classes. It might even be okay to require them to be turned off, because the school does have a phone number and a way for parents to contact students in an emergency, and most cell phone use in school is not a legitimate emergency. Students could turn the phones on if there were a legitimate emergency.

No, because it will distract them from their work. Besides, if they get in an accident and are badly hurt, they wouldn't be able to call you.

Should children be banned from using mobile phones?

Kids text and talk on the phone during class which causes them to be very distracted. Parts of their knowledge are suffering from too much cell phone use. Also, social skills may be affected by the consisent phone use.

For the same reason, you should not use a computer while the teacher is talking. From experience, I can positively say that you do not hear the teacher when you are typing on a computer.

What is kristen's cell phone number?

Kristen Kreuk's phone number is not known. Kristen Kreuk's fan mail address is Kristin Kreuk The Gersh Agency, Inc. 9465 Wilshire Blvd6th Floor, Beverly Hills, CA 90212.

Your cell phone screen went blank for no reason how do you fix it?

Either your cell phone screen has had the wires knocked loose or the screen is broken all together. I've heard you can buy the LCD screens for cell phones a lot cheaper than buying a new one. If not you may have to buy a new phone.

I had a phone do this and believe it or not if yours is having the same problem as mine you can put it in the freezer for 5-10 minutes and get about 5 minutes of screen time to recover important messages or contacts. I dont know why but being a computer nerd I figured a deep freeze may help and it did!

IT works

Who invented the razor cell phone?

1947 Bell Labs created the cellular phone so people can talk without having to walk to the person/drive he was a fine young man

Where do you get a hello kitty cell phone?

Well, I don't think you can have a "Hello Kitty Phone" But, you can find a phone COVER with a Hello Kitty design. Try looking in your nearest town/phone shop.

Like Where you got your phone.

Hope I helped!

- XxHelloKitty11xx

What cell phone does the president have?

The president has a BlackBerry "Storm". This phone is not even out yet but so how the president has one.

Can anyone give me caller tune code for the song aaoge jab tum from jab we met for my airtel mobile phone?

Hi, Just call Airel 121, talk with customer care executive, tell him/her to activate the caller tune of Jab we met- Aaoge Jab Tum Sajna [Not instrumental or Flute]. They will activate it on your Mobile.

Can you paint your cell phone?

Yes! Everyone should paint phones with acrylic paint! Remember: NEVER USE WATERCOLOR PAINT! It will not last! Acrylic paint will not leave behind any stains or marks. Personally, (without revealing my name) I would recommend using bright neon, shiny or glow-in-the-dark paint. Feel free to add your own flare or style, for example: zebra or leopard print, stripes or polka-dots and lastly, you could perhaps, paint your own picture. Like a forest, beach, next-door neighbor, or even possibly, the Mona Lisa, if you feel to do so. Just believe in yourself and you can truly paint a masterpiece!!!

Does Canada have cell phones?

Contrary to popular belief, Canada is technologically on par with the US. In some cases they are even more advanced. Of course they have cell phones.

Can texting cause arthritis?

Directly, no. But a similar syndrome to Arthritiscalled Carpel Tunnel can result from too much repetitive motion (in your wrists) if your hands are not correctly positioned when entering text or holding your cell phone for long durations. Carpel Tunnel also affects typists who spend long hours at the keyboard entering data into a computer.

The causes of arthritis to date are unknown and the use of the joints will not cause arthritis. However if there is a predisposition to one of the many forms of arthritis in a person then they are likely to start noticing it eventually in the most used joints. Carpel tunnel is often related with Rheumatoid arthritis as this is a disorder that is the result of inflammation putting pressure on the metacarpal nerve in the top of the hand near the wrist.

How do cell phone jammers work?

How Cell Phone Jammers work

Cell phones are everywhere these days. According to the Cellular Telecommunications and Internet Association, almost 195 million people in the United States had cell-phone service in October 2005. And cell phones are even more ubiquitous in Europe.

It's great to be able to call anyone at anytime. Unfortunately, restaurants, movie theaters, concerts, shopping malls and churches all suffer from the spread of cell phones because not all cell-phone users know when to stop talking. Who hasn't seethed through one side of a conversation about an incredibly personal situation as the talker shares intimate details with his friend as well as everyone else in the area?

While most of us just grumble and move on, some people are actually going to extremes to retaliate. Cell phones are basically handheld two-way radios. And like any radio, the signal can be disrupted, or jammed.

In this article, you'll see how cell-phone jammers work and learn about the legality of their use.

Disrupting a cell phone is the same as jamming any other type of radio communication. A cell phone works by communicating with its service network through a cell tower or base station. Cell towers divide a city into small areas, or cells. As a cell-phone user drives down the street, the signal is handed from tower to tower.

A jamming device transmits on the same radio frequencies as the cell phone, disrupting the communication between the phone and the cell-phone base station in the tower.

It's a called a denial-of-service attack. The jammer denies service of the radio spectrum to the cell-phone users within range of the jamming device.

amming devices overpower the cell phone by transmitting a signal on the same frequency and at a high enough power that the two signals collide and cancel each other out. Cell phones are designed to add power if they experience low-level interference, so the jammer must recognize and match the power increase from the phone.

Cell phones are full-duplex devices, which means they use two separate frequencies, one for talking and one for listening simultaneously. Some jammers block only one of the frequencies used by cell phones, which has the effect of blocking both. The phone is tricked into thinking there is no service because it can receive only one of the frequencies.

Less complex devices block only one group of frequencies, while sophisticated jammers can block several types of networks at once to head off dual-mode or tri-mode phones that automatically switch among different network types to find an open signal. Some of the high-end devices block all frequencies at once, and others can be tuned to specific frequencies.

To jam a cell phone, all you need is a device that broadcasts on the correct frequencies. Although different cellular systems process signals differently, all cell-phone networks use radio signals that can be interrupted. GSM, used in digital cellular and PCS-based systems, operates in the 900-MHz and 1800-MHz bands in Europe and Asia and in the 1900-MHz (sometimes referred to as 1.9-GHz) band in the United States. Jammers can broadcast on any frequency and are effective against AMPS, CDMA, TDMA, GSM, PCS, DCS, iDEN and Nextel systems. Old-fashioned analog cell phones and today's digital devices are equally susceptible to jamming.

The actual range of the jammer depends on its power and the local environment, which may include hills or walls of a building that block the jamming signal. Low-powered jammers block calls in a range of about 30 feet (9 m). Higher-powered units create a cell-free zone as large as a football field. Units used by law enforcement can shut down service up to 1 mile (1.6 km) from the device.

Electronically speaking, cell-phone jammers are very basic devices. The simplest just have an on/off switch and a light that indicates it's on. More complex devices have switches to activate jamming at different frequencies. Components of a jammer include:

Antenna

Every jamming device has an antenna to send the signal. Some are contained within an electrical cabinet. On stronger devices, antennas are external to provide longer range and may be tuned for individual frequencies.

Circuitry

The main electronic components of a jammer are:

* Voltage-controlled oscillator - Generates the radio signal that will interfere with the cell phone signal

* Tuning circuit - Controls the frequency at which the jammer broadcasts its signal by sending a particular voltage to the oscillator

* Noise generator - Produces random electronic output in a specified frequency range to jam the cell-phone network signal (part of the tuning circuit)

* RF amplification (gain stage) - Boosts the power of the radio frequency output to high enough levels to jam a signal

Power supply

Smaller cell phone jammers are battery operated. Some look like cell phone and use cell-phone batteries. Stronger devices can be plugged into a standard outlet or wired into a vehicle's electrical system.

Do Mady and Cara Gosselin have cell phones?

According to Kate Gosselin, both Mady and Cara have hand-me down iPhones from their mother.

If you go to Kate's website, Kate Plus my 8, and click on questions and answers (Q&A) and read some then it's obivious they have one, although they have thousands of rules about it (they are listed on the site) and there is no telling what their number is, besides, that is one of the rules, 'no answering unknown calls/texts' and, if they do answer, Kate looks at their cell and reads the messages and has this code so she can read it whenever and there is another rule going along with that: 'No deleting meassages' she can somehow tell if they deleted one.

A link to the website is under Related Links.

What is meaning of cell phone error pps 6180?

This is an automated message from some cell phone providers such as AT&T, Cingular and several others that lets the caller know that the number they are trying to reach is either out of service range (in an area without coverage), disconnected, or temporarily unreachable for another reason.

If you're sure you're dialing the right number and you know the person hasn't changed their number, try calling back at a later time.

(Source): AT&T Wireless

What is georgie henley's cell phone number?

georgie.henley.pretty@hotmail.co.UK

http://www.facebook.com/profile.php?ref=profile&id=100000919041336

whoever wrote this is lying this isn't georgie henleys email its a girl called Megan crintchs

What is Lauren London's cell phone number?

Lauren London is an American actress and model who was born on December 4, 1984. London's e-mail address is not made available to members of the public. However, fans can contact her via her fan mail address which is William Morris Endeavor Entertainment, 9601 Wilshire Blvd., 3rd Floor, Beverly Hills, CA 90210-5213, USA.

Does dog the bounty hunter have a cell phone?

He is a bounty hunter who communicates with his team which drive different cars and they all need phones to keep in touch with the cops and each other.

How do you watch Disney channel on your cell phone?

There are several ways, but the one I use is the simplest.

Go to Wikipedia and find out what the episode you want to see is called and then search it on youtube. Before watching, make sure the user you selected has all 3-4 parts, otherwise it is tedious trying to find the next part right after something exciting, dramatic, or funny has happened.

There is the rare case where no one on youtube has posted the episode, which is annoying, but rare.