Tuesday, December 16, 2008

Hack Cable TV

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TV Alternatives

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Motorola Digital Cable Box

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Comcast Cable Modem

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Sunday, December 14, 2008

Wireless Broadband

Wireless Broadband is a fairly new technology that provides high-speed wireless internet and data network access over a wide area.

Few WISPs provide download speeds of over 100 Mbit/s; most broadband wireless access services are estimated to have a range of 50 km (30 miles) from a tower.Technologies used include LMDS and MMDS, as well as heavy use of the ISM bands and one particular access technology is being standardized by IEEE 802.16, also known as WiMAX. WiMAX is highly popular in Europe but has not met full acceptance in the United States because cost of deployment does not meet return on investment figures. In 2005 the Federal Communications Commission adopted a Report and Order that revised the FCC’s rules to open the 3650 MHz band for terrestrial wireless broadband operations.[2] On November 14, 2007 the Commission released Public Notice DA 07-4605 in which the Wireless Telecommunications Bureau announced the start date for licensing and registration process for the 3650-3700 MHz band.

Initially, Wireless Internet Service Providers (WISPs) were only found in rural areas not covered by cable or DSL.[4] These early WISPs would employ a high-capacity T-carrier, such as a T1 or DS3 connection, and then broadcast the signal from a high elevation, such as at the top of a water tower. To receive this type of Internet connection, consumers mount a small dish to the roof of their home or office and point it to the transmitter. Line of sight is usually necessary for WISPs operating in the 2.4 and 5GHz bands with 900MHz offering better NLOS performance.

Mobile wireless broadband
Wireless broadband technologies also include new services from companies such as Verizon, Sprint, and AT&T Mobility, which allow a more mobile version of this broadband access. Consumers can purchase a PC card, laptop card, or USB equipment to connect their PC or laptop to the Internet via cell phone towers. This type of connection would be stable in almost any area that could also receive a strong cell phone connection. These connections can cost more for portable convenience as well as having speed limitations in all but urban environments.

Monday, December 8, 2008

Wireless Optical Mesh Solution Networks

ClearMesh Networks Wednesday launched a wireless optical mesh solution designed to fill the gap between copper, RF and fiber in delivering 5mbps to 100mbps services to small and midsized businesses.

“There isn’t a cost-effective way for carriers today to extend fiber to SMBs,” said Fima Vaisman, ClearMesh’s senior vice president of marketing, explaining their monthly spend of $500 to $1,000 does not support a fiber trench where it is not already available. “What we provide is a solution that extends the fiber core without having to trench fiber.”

It also provides higher bandwidth than do copper and RF solutions, such as Wi-Fi and WiMAX, he said. “If a customer needs more bandwidth and they are looking for an SLA, we think there is a gap between those solutions provided at the entry level by WiMAX and Wi-Fi, and the high-end level by fiber. There is a gap in the middle. That is the gap we are trying to serve.”

Available immediately, the ClearMesh Metro Grid solution includes the ClearMesh 300 node, which can be mounted on a pole or rooftop, and the ClearMesh Management System, which provides tools for installation, diagnostics, service analysis and provisioning. The ClearMesh 300 node combines wireless and optical technologies with a Layer 2 mesh architecture to deliver business-grade Ethernet.

“The ClearMesh 300 Node is a switching platform,” explained Vaisman. “It has an Ethernet switch with 2-gigabit Ethernet capacity. Four of the Ethernet ports are copper and they are connected to optical transceivers.”

The optical transceivers, he said, are LED-based, which gives them a wider beam than systems using lasers, like free-space optics. “What that allows the product to do is be installed on a light pole as well as on top of a building,” said Vaisman. “A laser product cannot be installed on a light pole because the light pole has too much vibration, too much movement. The product wouldn’t stay locked on. With the product we have the light beams are locked on and stay locked on using automatic tracking whether on a light pole or building. With that you have a much broader ability to deploy a mesh in a metro area. If the device moves, the light cone still hits the other node.”

Each node has three optical transceivers, which operate on the license-free 850nm light band and reach 250 meters. Each transceiver is motorized, so it can move independently up and down, and 360 degrees around. “This allows each node to see three other nodes. Using that, we create a mesh,” said Vaisman, explaining the mesh requires one node to be fiber-feed, and several nodes can be fed from the same fiber to increase the capacity delivered into the mesh.

The ClearMesh node lists for $6,000, and less in volume. Considering installation costs, the company uses $5,000 per node in its ROI calculations. In contrast to trenching fiber, ClearMesh can cover seven buldings in a MetroGrid network for $35,000 in a matter of days while the fiber deployment over the same area will cost $180,000 and take months to install, he said. With a single customer per building and a single T1 replacement at $500 per month, the payback is 10 months, Vaisman said, adding a more realistic scenario is three customers per building paying $750 per month for a 10mbps service for an ROI of two months.

Yankee Group Analyst Tara Howard agrees that the ClearMesh solution serves “as a logical extension of a fiber network,” but she questions the market potential, discounting its appeal to Tier 1 companies that are laying fiber. “The opportunity is going to be with local LECs and municipalities,” she said, adding the fact that it does not compete with Wi-Fi or WiMAX is a plus.

“We don’t do what Wi-Fi does; we don’t offer mobility,” said Vaisman. “We don’t do what WiMAX does; we don’t offer five-mile reach. In a dense metro area, we offer high bandwidth and the ability to sign SLAs without any interference,” he said. The systems offers latency at one-tenth of 1ms, so 10 nodes equals 1ms of delay.

Wireless 3G DR RF Solutions

Wirelss Wide Area Network A WWAN differs from a WLAN (wireless LAN) in that it uses Mobile telecommunication cellular network technologies such as WIMAX (though it's better applicated into WMAN Networks), UMTS, GPRS, CDMA2000, GSM, CDPD, Mobitex, HSDPA or 3G to transfer data. It can use also LMDS and Wi-Fi to connect to the Internet. These cellular technologies are offered regionally, nationwide, or even globally and are provided by a wireless service provider for a monthly usage fee.[1] WWAN connectivity allows a user with a laptop and a WWAN card to surf the web, check email, or connect to a Virtual Private Network (VPN) from anywhere within the regional boundaries of cellular service. Various computers now have integrated WWAN capabilities (Such as HSDPA in Centrino). This means that the system has a cellular radio (GSM/CDMA) built in, which allows the user to send and receive data. There are two basic means that a mobile network may use to transfer data:



Packet-switched Data Networks (GPRS/CDPD)
Circuit-switched dial-up connections
Since radio communications systems do not provide a physically secure connection path, WWANs typically incorporate encryption and authentication methods to make them more secure. Unfortunately some of the early GSM encryption techniques were flawed, and security experts have issued warnings that cellular communication, including WWANs, is no longer secure.[2] UMTS(3G) encryption was developed later and has yet to be broken.


Examples of providers for WWAN include Sprint Nextel, Verizon, and AT&T.

wireless rf wlan solutions

* TrangoLINK Giga® is a split-architecture (ODU/IDU) full duplex RF microwave system link that is both native Ethernet and native-TDM.
* TrangoLINK® Apex is an all-outdoor full duplex RF microwave radio that is native-Ethernet for 100% IP traffic.
* ATLAS 4900™ is an all-outdoor native Ethernet OFDM 4.9 GHz wireless bridge that operates in the licensed Public Safety band.

Unlicensed Point-to-Point Wireless WAN Radios

* TrangoLINK-45™ is an all-outdoor, native Ethernet, multi-band OFDM wireless Ethernet bridge that is capable of operation in 4 different 5 GHz bands (5.2, 5.3, 5.4, 5.8 GHz).
* TrangoLINK-10™ is an all-outdoor, native Ethernet 5.8 GHz wireless bridge.

Unlicensed Point-to-MultiPoint Wireless WAN Radios

For delivering point-to-multipoint (PtMP) broadband access wireless WAN connectivity from a central office to many remote offices, Trango offers these robust solutions.

* Access5830™ System 5.8 GHz broadband wireless access system delivers up to 10 Mbps up to 18 miles.
* Trango M2400S™ 2.4 GHz broadband wireless access system delivers up to 5 Mbps up to 25 miles.
* Trango M900S™ 900 MHz broadband wireless access system delivers up to 3 Mbps up to 20 miles.

Sunday, December 7, 2008

Wirelss Wide Area Network

Wirelss Wide Area Network A WWAN differs from a WLAN (wireless LAN) in that it uses Mobile telecommunication cellular network technologies such as WIMAX (though it's better applicated into WMAN Networks), UMTS, GPRS, CDMA2000, GSM, CDPD, Mobitex, HSDPA or 3G to transfer data. It can use also LMDS and Wi-Fi to connect to the Internet. These cellular technologies are offered regionally, nationwide, or even globally and are provided by a wireless service provider for a monthly usage fee.[1] WWAN connectivity allows a user with a laptop and a WWAN card to surf the web, check email, or connect to a Virtual Private Network (VPN) from anywhere within the regional boundaries of cellular service. Various computers now have integrated WWAN capabilities (Such as HSDPA in Centrino). This means that the system has a cellular radio (GSM/CDMA) built in, which allows the user to send and receive data. There are two basic means that a mobile network may use to transfer data:



Packet-switched Data Networks (GPRS/CDPD)
Circuit-switched dial-up connections
Since radio communications systems do not provide a physically secure connection path, WWANs typically incorporate encryption and authentication methods to make them more secure. Unfortunately some of the early GSM encryption techniques were flawed, and security experts have issued warnings that cellular communication, including WWANs, is no longer secure.[2] UMTS(3G) encryption was developed later and has yet to be broken.


Examples of providers for WWAN include Sprint Nextel, Verizon, and AT&T.

Linksys WMP300N Wireless N PCI Network Adpater

Highlights
High-speed Wireless-N (draft 802.11n) networking for your desktop computer
MIMO technology uses multiple radios to create a robust signal that travel far and reduces dead spots
Can connect to Wireless-G and -B networks
Enhanced wireless security with Wi-Fi Protected Access™ (WPA2) with up to 256-bit encryption



Overview
Enjoy high-speed networking without wires with the Linksys® WMP300N Wireless-N PCI Adapter. The Wireless-N PCI Adapter installs in most desktop and tower PCs, and lets you put your computer almost anywhere in the building without the hassle of running network cables. You don't have to drill holes in your walls and climb through the attic or cellar to get connected to the network. Using the wireless networking technology, Wireless-N (draft 802.11n), the card delivers enhanced speed of up to 270 Mbps. By overlaying the signals of two Wireless-N compatible radios, the 'Multiple In, Multiple Out' (MIMO) technology effectively increases the data rate. MIMO uses signal reflections to increase the range and reduce 'dead spots' in the wireless coverage area. The robust signal travels farther, maintaining wireless connections. To protect your data and privacy, the card uses 256-bit WEP encryption besides WPA and WPA2 security.

Connecting Computers to TVs Wirelessly

As an alternative to using cables, you can also use Wi-Fi to connect computers and TVs wirelessly. Because televisions do not ordinarily support Wi-Fi, you will need to install a separate unit between the computer and TV. One common solution is called a Wireless PC to TV system or [i[Digital Media Receiver. These products connect via AV cable to the TV and supply Wi-Fi connections to any computer in the home.
Another wireless PC to TV connectivity option is based on Windows Media Center Edition (MCE). If you purchase a Windows XP or Windows Vista PC with the MCE application included, this system contains built in wireless connectivity support for streaming images to your television. Some of these systems also support TV tuner cards that allow your computer to receive incoming television signals. Finally, you can extend the capability of a Media Center PC across an entire wireless home network by installing a Media Center Extender product like the LInksys DMA2100.

Connecting Computers to TVs With Wires

Televisions do not normally support Ethernet cable connections. Instead, you will typically connect your laptop or desktop PC to a TV using one of the following types of audio-visual (AV) cables:


- S-Video
- HDMI
- DVI or HDMI-to-DVI
- VGA
- Any of the above - to-SCART (in Europe


A scan converter is a device that translates the computer's video signal into standard TV formats. You may need to set up a scan converter to connect your computer and TV if, between them, the two do not support any compatible combination of AV cable technologies listed above. Newer televisions, however, generally support multiple types of digital inputs, and finding the right cable should not be too difficult.

Wireless WAN Solutions

Extend your network infrastructure with long range
outdoor wireless Ethernet connections

Trango's long range fixed wireless broadband Ethernet equipment is ideal for all types of wireless wide area network (WWAN) and wireless local area network (WLAN) applications. Trango outdoor wireless networking solutions allow you to quickly, easily, and cost effectively deploy reliable, high-speed, secure wireless IP connections between multiple remote locations at distances up to 45+ miles, and enable you to eliminate your costly leased lines and avoid expensive time consuming fiber trenching.
Wireless WAN Applications

Wireless WAN applications are endless for Trango long-range wireless Ethernet bridges. For example, a business may need to link its IT infrastructure to a few outlying buildings; a university or any school may need to provide internet access to dormitories or other buildings across campus; or a hospital may need to establish a secure link to a clinic across town so that doctors may securely exchange patient information over a high-speed connection.

Whether you need to a network connection across the street, across town, or from urban to rural areas, Trango wireless WAN/LAN building-to-building outdoor networks are ideal for any private enterprise or network operator that requires high-speed connectivity between two or more remote locations. Trango long range wireless wide area network (WWAN) solutions are well suited for a wide variety of industries and applications because they deliver high-capacity bandwidth, are extremely reliable, highly secure, and can be established with minimal effort and cost.

Licensed Point-to-Point Wireless WAN Radios

* TrangoLINK Giga® is a split-architecture (ODU/IDU) full duplex RF microwave system link that is both native Ethernet and native-TDM.
* TrangoLINK® Apex is an all-outdoor full duplex RF microwave radio that is native-Ethernet for 100% IP traffic.
* ATLAS 4900™ is an all-outdoor native Ethernet OFDM 4.9 GHz wireless bridge that operates in the licensed Public Safety band.

Unlicensed Point-to-Point Wireless WAN Radios

* TrangoLINK-45™ is an all-outdoor, native Ethernet, multi-band OFDM wireless Ethernet bridge that is capable of operation in 4 different 5 GHz bands (5.2, 5.3, 5.4, 5.8 GHz).
* TrangoLINK-10™ is an all-outdoor, native Ethernet 5.8 GHz wireless bridge.

Unlicensed Point-to-MultiPoint Wireless WAN Radios

For delivering point-to-multipoint (PtMP) broadband access wireless WAN connectivity from a central office to many remote offices, Trango offers these robust solutions.

* Access5830™ System 5.8 GHz broadband wireless access system delivers up to 10 Mbps up to 18 miles.
* Trango M2400S™ 2.4 GHz broadband wireless access system delivers up to 5 Mbps up to 25 miles.
* Trango M900S™ 900 MHz broadband wireless access system delivers up to 3 Mbps up to 20 miles.