Monday, July 21, 2008
Future of 4G Technologies Emerging
According to In-Stat reports, the primary 4G technologies are expected to be Long-Term Evolution, Ultra-Mobile Broadband and IEEE 802.16m WiMax. The International Telecommunication Union is expected to release an official definition of wireless 4G technology in 2008 or 2009.
Sophos Strengthens Next-Generation Web Security with WS1000
IT security and control firm Sophos today announced the latest version of its WS1000 web appliance, which brings together enterprise-grade policy and URL filtering with trusted real-time security filtering–all managed on one easy-to-use platform. The new Sophos solution enables businesses to effectively protect against growing web threats at the gateway, which are not adequately protected by current market offerings. The WS1000 also offers network administrators improved oversight and reporting of web browsing behaviors in their organization.
Sprint Nextel Plans $5 Billion for 4G Wireless Broadband Network
Sprint Nextel has indicated that it expects to spend more than $5 billion to build a nationwide 4G wireless broadband network. The carrier will market the services associated with the new network under the name Xohm.
Linksys Dual-Band Wireless-N Gigabit Router
The Dual-Band Wireless-N Gigabit Router is really four devices in one box. First, there's the dual-band Wireless Access Point, which lets you connect to the network without wires. There's also a built-in 4-port full-duplex 10/100/1000 Switch to connect your wired-Ethernet devices together at up to gigabit speeds. The Router function ties it all together and lets your whole network share a high-speed cable or DSL Internet connection
Thursday, July 17, 2008
Smart Network Devices (SND) unveiled the world's smallest autonomous network camera at Embedded World 2003 in Nurnberg.
Smart Network Devices (SND) unveiled the world's smallest autonomous network camera at Embedded World 2003 in Nurnberg Measuring only 3 x 6 x 2cm and with an estimated material cost of under Eur 70.00 it sets new standards in network-supported security and video-surveillance technology
Connecting either to Ethernet or directly to the Internet, it carries out image compression at a speed capable of supporting M-JPEG at between 5 and 10frame/s.
The camera is a reference design, based on the SND Micro WebTarget board.
It uses the newest CMOS image-sensor technology and a Hyperstone 32bit RISC/DSP CPU for image compression.
Data from the sensor passes through a buffer unit to the CPU, where it is compressed into JPEG-format and then made available to the network through a 100Mbit/s Ethernet interface.
The small size and the low costs come from the minimising the system's hardware components.
The CMOS image sensor produces digital data, eliminating costly and expensive conversion of an analogue video signal.
The image sensor automatically handles the primary image processing (colour filter, automatic white balance, adaptive sensitivity according to light conditions, Gamma correction etc) so that downstream image processors are unnecessary.
Image compression into JPEG-format is through software.
The image acquisition and compression is under the control of SND's HyNetOS embedded network operating system.
This provides all necessary drivers (CMOS-sensor, Ethernet) and communication protocols (TCP/IP, HTTP, FTP) as well as a file system for plug-in to random networks or directly to the Internet.
A wireless variant of the network camera module, based on SND's Micro BlueTarget Bluetooth board, is planned for the 2nd quarter of 2003.
The corresponding Bluetooth-protocol-stack for HyNetOS is available now.
The network camera reference design is available now as an evaluation kit, complete with full hardware schematics for volume manufacturing.
The HyNetOS is available under license.
• Smart Network Devices: contact details and other news
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Connecting either to Ethernet or directly to the Internet, it carries out image compression at a speed capable of supporting M-JPEG at between 5 and 10frame/s.
The camera is a reference design, based on the SND Micro WebTarget board.
It uses the newest CMOS image-sensor technology and a Hyperstone 32bit RISC/DSP CPU for image compression.
Data from the sensor passes through a buffer unit to the CPU, where it is compressed into JPEG-format and then made available to the network through a 100Mbit/s Ethernet interface.
The small size and the low costs come from the minimising the system's hardware components.
The CMOS image sensor produces digital data, eliminating costly and expensive conversion of an analogue video signal.
The image sensor automatically handles the primary image processing (colour filter, automatic white balance, adaptive sensitivity according to light conditions, Gamma correction etc) so that downstream image processors are unnecessary.
Image compression into JPEG-format is through software.
The image acquisition and compression is under the control of SND's HyNetOS embedded network operating system.
This provides all necessary drivers (CMOS-sensor, Ethernet) and communication protocols (TCP/IP, HTTP, FTP) as well as a file system for plug-in to random networks or directly to the Internet.
A wireless variant of the network camera module, based on SND's Micro BlueTarget Bluetooth board, is planned for the 2nd quarter of 2003.
The corresponding Bluetooth-protocol-stack for HyNetOS is available now.
The network camera reference design is available now as an evaluation kit, complete with full hardware schematics for volume manufacturing.
The HyNetOS is available under license.
• Smart Network Devices: contact details and other news
• Email this article to a colleague
• Register for the free Electronicstalk email newsletter
• Electronicstalk Home Page
Other hardware for establishing networks or dial-up connections
Other hardware for establishing networks or dial-up connections:
Multiplexer: device that combines several electrical signals into a single signal
Network Card: a piece of computer hardware to allow the attached computer to communicate by network
Modem: device that modulates an analog "carrier" signal (such as sound), to encode digital information, and that also demodulates such a carrier signal to decode the transmitted information, as a computer communicating with another computer over the telephone network
ISDN terminal adapter (TA): a specialized gateway for ISDN
Line Driver: a device to increase transmission distance by amplifying the signal. Base-band networks only.
Multiplexer: device that combines several electrical signals into a single signal
Network Card: a piece of computer hardware to allow the attached computer to communicate by network
Modem: device that modulates an analog "carrier" signal (such as sound), to encode digital information, and that also demodulates such a carrier signal to decode the transmitted information, as a computer communicating with another computer over the telephone network
ISDN terminal adapter (TA): a specialized gateway for ISDN
Line Driver: a device to increase transmission distance by amplifying the signal. Base-band networks only.
Some hybrid network devices
Some hybrid network devices:
Multilayer Switch: a switch which, in addition to switching on OSI layer 2, provides functionality at higher protocol layers.
Protocol Converter: a hardware device that converts between two different types of transmissions, such as asynchronous and synchronous transmissions.
Brouter: Combine router and bridge functionality and are therefore working on OSI layers 2 and 3.
Digital media receiver: Connects a computer network to a home theatreHardware or software components that typically sit on the connection point of different networks, e.g. between an internal network and an external network:
Proxy: computer network service which allows clients to make indirect network connections to other network services* Firewall: a piece of hardware or software put on the network to prevent some communications forbidden by the network policyOther hardware for establishing networks or dial-up connections:
Multiplexer: device that combines several electrical signals into a single signal.
Network Card: a piece of computer hardware to allow the attached computer to communicate by network.
Modem: device that modulates an analog "carrier" signal (such as sound), to encode digital information, and that also demodulates such a carrier signal to decode the transmitted information, as a computer communicating with another computer over the telephone network.
ISDN terminal adapter (TA): a specialized gateway for ISDN.
Line Driver: a device to increase transmission distance by amplifying the signal. Base-band networks only.
Multilayer Switch: a switch which, in addition to switching on OSI layer 2, provides functionality at higher protocol layers.
Protocol Converter: a hardware device that converts between two different types of transmissions, such as asynchronous and synchronous transmissions.
Brouter: Combine router and bridge functionality and are therefore working on OSI layers 2 and 3.
Digital media receiver: Connects a computer network to a home theatreHardware or software components that typically sit on the connection point of different networks, e.g. between an internal network and an external network:
Proxy: computer network service which allows clients to make indirect network connections to other network services* Firewall: a piece of hardware or software put on the network to prevent some communications forbidden by the network policyOther hardware for establishing networks or dial-up connections:
Multiplexer: device that combines several electrical signals into a single signal.
Network Card: a piece of computer hardware to allow the attached computer to communicate by network.
Modem: device that modulates an analog "carrier" signal (such as sound), to encode digital information, and that also demodulates such a carrier signal to decode the transmitted information, as a computer communicating with another computer over the telephone network.
ISDN terminal adapter (TA): a specialized gateway for ISDN.
Line Driver: a device to increase transmission distance by amplifying the signal. Base-band networks only.
Common basic network devices
About Computer Networking Device, here's the explamation : Common basic network devices:
Gateway: device sitting at a network node for interfacing with another network that uses different protocols. Works on OSI layers 4 to 7.
Router: a specialized network device that determines the next network point to which to forward a data packet toward its destination. Unlike a gateway, it cannot interface different protocols. Works on OSI layer 3.* Bridge: a device that connects multiple network segments along the data link layer. Works on OSI layer 2.* Switch: a device that allocates traffic from one network segment to certain lines (intended destination(s)) which connect the segment to another network segment. So unlike a hub a switch splits the network traffic and sends it to different destinations rather than to all systems on the network. Works on OSI layer 2.
Hub: connects multiple Ethernet segments together making them act as a single segment. When using a hub, every attached device shares the same broadcast domain and the same collision domain. Therefore, only one computer connected to the hub is able to transmit at a time. Depending on the network topology, the hub provides a basic level 1 OSI model connection among the network objects (workstations, servers, etc). It provides bandwidth which is shared among all the objects, compared to switches, which provide a dedicated connection between individual nodes. Works on OSI layer 1.
Repeater: device to amplify or regenerate digital signals received while setting them from one part of a network into another. Works on OSI layer 1.Some hybrid network devices:* Multilayer Switch: a switch which, in addition to switching on OSI layer 2, provides functionality at higher protocol layers.
Gateway: device sitting at a network node for interfacing with another network that uses different protocols. Works on OSI layers 4 to 7.
Router: a specialized network device that determines the next network point to which to forward a data packet toward its destination. Unlike a gateway, it cannot interface different protocols. Works on OSI layer 3.* Bridge: a device that connects multiple network segments along the data link layer. Works on OSI layer 2.* Switch: a device that allocates traffic from one network segment to certain lines (intended destination(s)) which connect the segment to another network segment. So unlike a hub a switch splits the network traffic and sends it to different destinations rather than to all systems on the network. Works on OSI layer 2.
Hub: connects multiple Ethernet segments together making them act as a single segment. When using a hub, every attached device shares the same broadcast domain and the same collision domain. Therefore, only one computer connected to the hub is able to transmit at a time. Depending on the network topology, the hub provides a basic level 1 OSI model connection among the network objects (workstations, servers, etc). It provides bandwidth which is shared among all the objects, compared to switches, which provide a dedicated connection between individual nodes. Works on OSI layer 1.
Repeater: device to amplify or regenerate digital signals received while setting them from one part of a network into another. Works on OSI layer 1.Some hybrid network devices:* Multilayer Switch: a switch which, in addition to switching on OSI layer 2, provides functionality at higher protocol layers.
different types of networks
topology : The geometric arrangement of a computer system. Common topologies include a bus, star, and ring. See the Network topology diagrams in the Quick Reference section of Webopedia.
protocol : The protocol defines a common set of rules and signals that computers on the network use to communicate. One of the most popular protocols for LANs is called Ethernet. Another popular LAN protocol for PCs is the IBM token-ring network .
architecture : Networks can be broadly classified as using either a peer-to-peer or client/server architecture.Computers on a network are sometimes called nodes. Computers and devices that allocate resources for a network are called servers.
protocol : The protocol defines a common set of rules and signals that computers on the network use to communicate. One of the most popular protocols for LANs is called Ethernet. Another popular LAN protocol for PCs is the IBM token-ring network .
architecture : Networks can be broadly classified as using either a peer-to-peer or client/server architecture.Computers on a network are sometimes called nodes. Computers and devices that allocate resources for a network are called servers.
MakSat WindMAX
High Power OFDM Radio Router/Bridge with Multiple modes like Access Point/Client/Bridge and operates in IEEE 802.11b/g standards. s.
Network Router
A network router is a small electronic device that allows you build a home network simply. The home router serves as the core or "centerpiece" of the network to which computers, printers and other devices can be connected. Networking with a router helps you to. For example you want to share files between computers, share an Internet connection between computers
share a printer, or connect your game console or other home entertainment equipment to the Internet.
share a printer, or connect your game console or other home entertainment equipment to the Internet.
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