Examples of Cameras with Wireless Capability
Vivotek Wireless 802.11g Network Camera with Dual-Codec Network Camera and 2-way audio, Includes 6mm lens. 0.5 Lux / F2.0 (Typical); 0 Lux (10 meters IR Lens on) MJPEG/MPEG4 Compression Selectable. Up to 15 frames at 704x480 + Optimal Synchronization of Audio & Video + UPnP & DDNS Support +Intelligent Motion Detection + Pre/Post Alarm Snapshots + Extended I/O for Sensor & Alarm + Day / Night Lens Support (Optional) + Auto Iris Lens Support (Optional). Temperature: 0~40 C(32~102 F)
Wireless IEEE802.11g and Ethernet network interface for flexible installation. It supports the WPA (Wi-Fi Protected Access) and WPA2 protocols to provide the best security measures for wireless networks. 1 lux, F2.0 It provides MPEG4 or Motion JPEG images at up to 30 frames per second in all resolutions up to VGA 640x480 pixels. It can operate in light conditions as low as 1 lux. Up to 30 frames per second in all resolutions ranging up to 640x480. 4.0 mm, F2.0, fixed iris, horizontal viewing angle: 55°
IQeye302 camera with wireless capability and 4 - 10 mm lens (36 - 88 degree). Requires an additional card to provide wireless function. Includes power supply. This camera is an intelligent imaging system with a 2 Megapixel color imager with 0.3 lux sensitivity. Provides Digital pan, tilt, zoom. 1/2" 1600 x 1200 CMOS digital imager, . Selectable windowing and subsampling, AGC or selectable gain, Adjustable spot meter window, Configurable color balance, Variable JPEG compression ratio, Text and graphic overlays. Ethernet: RJ45 10/100BASE-T, Connections: Power: 12-33 V DC power supply, Console Port: 230 Kbps over 9-pin D serial. Relay I/O: 6 screw terminals, two in, two out, 12V DC power out, Camera mount: 1/4 - 20 threaded mount. 10/100BASE-T Fast Ethernet, Integrated HTTP and FTP servers, Built Clients: SMTP (email) , BOOTP, FTP, SNMP, Telnet, TFTP, Protocols: TCP, IP, UDP,
Then add the wireless card for the IQ camera:
Wireless IEEE 802.11b-compliant card with Patch Antenna and cable. High Power Version - 200 mW Long Range LAN Card is a flexible data communications system implemented as an extension to, or as an alternative for, a wired LAN, lease line, Internet access etc.
Contact us if you would like some more suggestions, or need pricing for any of these cameras 1-800-431-1658 or 914-944-3425
How Wireless Networks Work
And, how to set one up
If you've been in an airport, coffee shop, library or hotel recently, chances are you've been right in the middle of a wireless network. Many people also use wireless networking, also called WiFi or 802.11 networking, to connect their computers at their organization or home, and an increasing number of cities use the technology to provide free or low-cost Internet access to residents. In the near future, wireless networking may become so widespread that you can access the Internet just about anywhere at any time, without using wires. Some care must be taken when setting up a wireless network. Wireless radio signals can be blocked by buildings or trees. They work best when you have line-of-sight between the locations. Here’s more information about how they work.
WiFi has a lot of advantages. Wireless networks are easy to set up and inexpensive. They're also unobtrusive - unless you're on the lookout for a place to use your laptop, you may not even notice when you're in a hotspot. In this article, we'll look at the technology that allows information to travel over the air. We'll also review what it takes to create a wireless network in your organization.
We'll start with a few WiFi basics. A wireless network uses radio waves, just like cell phones, televisions and radios do. In fact, communication across a wireless network is a lot like two-way radio communication. Here's what happens:
1. A computer's wireless adapter translates data into a radio signal and transmits it using an antenna.
2. A wireless router or network access point receives the signal and decodes it. It sends the information to the rest of the network or Internet using a physical, wired Ethernet connection.
The process also works in reverse, with the router or network access point receiving information from the rest of the network or Internet, translating it into a radio signal and sending it to the computer's wireless adapter. An IP camera is also a computer and it can use an internal WiFi radio or an external radio to communicate with the rest of the network just like any other wireless laptop.
The radios used for WiFi communication are very similar to the radios used for walkie-talkies, cell phones and other devices. They can transmit and receive radio waves, and they can convert 1s and 0s into radio waves and convert the radio waves back into 1s and 0s. But WiFi radios have a few notable differences from other radios:
- They transmit at frequencies of 2.4 GHz or 5GHz. This frequency is considerably higher than the frequencies used for cell phones, walkie-talkies and televisions. The higher frequency allows the signal to carry more data.
- They use 802.11 networking standards, which come in several flavors:
o 802.11b was the first version to reach the marketplace. It's the slowest and least expensive standard, and it's becoming less common as faster standards become less expensive. 802.11b transmits in the 2.4 GHz frequency band of the radio spectrum. It can handle up to 11 megabits of data per second, and it uses complimentary code keying (CCK) coding.
o 802.11g also transmits at 2.4 GHz, but it's a lot faster than 802.11b - it can handle up to 54 megabits of data per second. 802.11g is faster because it uses orthogonal frequency-division multiplexing (OFDM), a more efficient coding technique.
o 802.11a transmits at 5GHz and can move up to 54 megabits of data per second. It also and uses OFDM coding. Newer standards, like 802.11n, can be even faster than 802.11g. However, the 802.11n standard isn't yet final.
- WiFi radios can transmit on any of three frequency bands. Or, they can "frequency hop" rapidly between the different bands. Frequency hopping helps reduce interference and lets multiple devices use the same wireless connection simultaneously.
You may be wondering why people refer to WiFi as 802.11 networking. The 802.11 designation comes from the Institute of Electrical and Electronics Engineers (IEEE). The IEEE sets standards for a range of technological protocols, and it uses a numbering system to classify these standards.
As long as they all have wireless adapters, several devices can use one router to connect to the network or Internet. This connection is convenient and virtually invisible, and it's fairly reliable. If the router fails or if too many people try to use high-bandwidth applications at the same time, however, users can experience interference or lose their connections.
Next, we'll look at how to create a wireless network in your organization
Building a Wireless Network
If you want to take advantage of public WiFi hotspots or start a wireless network in your organization, the first thing you'll need to do is make sure your computer or camera has the right wireless gear. Most new laptops and many new desktop computers come with built-in wireless transmitters. If your laptop doesn't, you can buy a wireless adapter that plugs into the PC card slot or USB port. Desktop computers can use USB adapters, or you can buy an adapter that plugs into the PCI slot inside the computer's case. Many of these adapters can use more than one 802.11 standard. IP cameras can also be found with built-in wireless capability. Some cameras come with a slot where you can plug in a wireless card (like the IQ302W), while others can be made wireless by adding an external wireless device point.
Once you've installed your wireless adapter and the drivers that allow it to operate, your computer should be able to automatically discover existing networks. This means that when you turn your computer on in a WiFi hotspot, the computer will inform you that the network exists and ask whether you want to connect to it. If you have an older computer, you may need to use a software program to detect and connect to a wireless network.
Being able to connect to the Internet in public hotspots is extremely convenient. Wireless networks in your organization are convenient as well. They allow you to easily connect multiple computers or IP cameras and to move them from place to place without disconnecting and reconnecting wires. Be careful because these radio signals can be blocked by walls. Sometimes the signal will go through and sometimes not. It depends on the structure of the wall.
If you already have several computers networked in your organization, you can create a wireless network with a wireless access point. If you have several computers that are not networked, or if you want to replace your Ethernet network, you'll need a wireless router. This is a single unit that contains:
1. A port to connect to your cable or DSL modem
2. A router
3. An Ethernet hub (ethernet.htm)
4. A firewall
5. A wireless access point
A wireless router allows you to use wireless signals or Ethernet cables to connect your computers to one another, to a printer and to the Internet. Most routers provide coverage for about 100 feet (30.5 meters) in all directions, although walls and doors can block the signal. If your organization is very large, you can buy inexpensive range extenders or repeaters to increase your router's range. You can also use device access points with higher output power.
As with wireless adapters, many routers can use more than one 802.11 standard. 802.11b routers are slightly less expensive, but they're slower than 802.11a or 802.11g routers. Most people select the 802.11g option for its speed and reliability.
Once you plug in your router, it should start working at its default settings. Most routers let you use a Web interface to change your settings. You can select:
The name of the network, known as its service set identifier (SSID) -- The default setting is usually the manufacturer's name.
The channel that the router uses -- Most routers use channel 6 by default. If you live in an apartment and your neighbors are also using channel 6, you may experience interference. Switching to a different channel should eliminate the problem.
Your router's security options -- Many routers use a standard, publicly-available sign-on, so it's a good idea to set your own username and password.
Security is an important part of an organizations wireless network, as well as public WiFi hotspots. If you set your router to create an open hotspot, anyone who has a wireless card will be able to use your signal. Most people would rather keep strangers out of their network, though. Doing so requires you to take a few security precautions.
To keep your network private, you can use one of the following methods:
- Wired Equivalency Privacy (WEP) uses 64-bit or 128-bit encryption. 128-bit encryption is the more secure option. Anyone who wants to use a WEP-enabled network has to know the WEP key, which is usually a numerical password.
- WiFi Protected Access (WPA) is a step up from WEP and is now part of the 802.11i wireless network security protocol. It uses temporal key integrity protocol encryption. As with WEP, WPA security involves signing on with a password. Most public hotspots are either open or use WPA or 128-bit WEP technology.
- Media Access Control (MAC) address filtering is a little different from WEP or WPA. It doesn't use a password to authenticate users - it uses a computer's physical hardware. Each computer has its own unique MAC address. MAC address filtering allows only machines with specific MAC addresses to access the network. You must specify which addresses are allowed when you set up your router. This method is very secure, but if you buy a new computer or if visitors to your home want to use your network, you'll need to add the new machines' MAC addresses to the list of approved addresses.
Wireless networks are easy to use and inexpensive to set up, but be careful about how they are set up and the security used to protect them.
If you would like more information about wireless cameras, please contact us at 1-800-431-1658 or 914-944-3425 or use a contact form.
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