Speed Dsl Modem
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US $4.99
Dsl (Digital Subscriber Line)
DSL (Digital Subscriber Line)
DSL(Digital Subscriber Line) is a technology that enables to use the unused bandwidth that already exists on a regular phone line to deliver fast digital data transmission without affecting the analog telephone service used. DSL, which also commonly known as xDSL or ADSL, uses ordinary copper telephone wiring to deliver a high-speed, downstream (from the Internet to your computer) channel to subscribers and a lower-speed, upstream (from your computer to the Internet) channel to the network while at the same time providing POTS ( Plain Old Telephone Services).
DSL technology has added a new twist to the utility of telephone lines. Telephone lines, which were constructed to carry a single voice signal with a 3.4 kHz bandwidth channel, can now convey nearly 100 digitally compressed voice signals, or a video signal with quality similar to broadcast television.
DSL technologies increase the information-carrying ability of traditional copper wires. DSL enables high-speed multimedia services such as video-on-demand, Internet access, distance learning, remote corporate LAN access, and videoconferencing for anyone with access to a clean copper line.
ADSL is able to convert the existing information system network from one limited to voice, text, and low resolution graphics to a powerful network that can deliver multimedia to everyone’s home or small business. Implementation of ADSL is quick at up to 1.5 Mbits/s and 512 kbits/s upstream. That’s about 30 times faster than today’s analog modems.
How does DSL work?
DSL allows for greater bandwidth by utilizing more of the bandwidth available on a common analog line and connecting digitally on both the uplink and downlink connection.
DSL modems can provide downlink connection speeds greater than 6 Mbps and uplink speeds of 640 Kbps, or as much as 1.1 Mbps in both directions.This makes DSL not only much faster than 56K analog modems, but also faster than ISDN and rivaling cable modems in bandwidth. This allows phone companies to compete with cable Internet Service Providers. Because many of the expected applications for DSL involves digital, compressed video, forward error correction is employed to reduce impulse noise error with symbol-by-symbol error correction to counteract continuous noise.
DSL is not a bus-related technology like analog or cable modems. With DSL, bandwidth rates available are more consistent to the end user. There is a geographic requirement that the end user must be within 18,000 feet of the central office or signal degradation will become too great and DSL unfeasible.
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Cisco High-Speed WAN Interface Card DSL Modem Plug-in Module Hwic 24Mbps HWIC1ADSLM $510 Cisco High-Speed WAN Interface Card DSL Modem Plug-in Module Hwic 24Mbps HWIC1ADSLM |
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Best Data SupraMax DSL602E DSL Modem $44.99 1 x DSL WAN 1 x RJ-45 10Base-T 10 Mbps Ethernet 8 Mbps 8 Mbps DSL SupraMax DSL602E DSL Modem 9V Power Adapter Easy Start Guide Telephone cable Ethernet cable Resource CD This DSL602E is designed to connect to the Internet and to your local area network (LAN) high speed Ethernet. It has full Network Address Translation (NAT) firewall, demilitarized zone (DMZ) services, and encryption security support to block unwanted users from accessing your network. Quality of Service (QoS) and Policy routing (PR) are also supported. This router is compatible with personal computers and Apple Macs. Best Data Best Data Products, Inc DSL Modem DSL602E External Network SupraMax SupraMax DSL602E DSL Modem www.bestdata.com |
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NETGEAR DGN2200-100NAS Wireless Router with DSL Modem $135.04 The NETGEAR N300 Wireless ADSL2+ Modem Router Router is ideal for both professional and personal Internet use providing Wireless-N speed for simultaneous downloads voice and music and online gaming. Complete with a built-in DSL modem it is compatible with all major DSL Internet service providers. Storage for downloads is easy with ReadySHARE for shared access to a USB storage device. Live Parental Controls with flexible and customizable filter settings. ReadySHARE USB storage access supports FAT16/32 NTFS Read/Write. Multiple SSID guest networks (separate security and access restrictions). Broadband usage meter measures Internet usage. Power and Wi-Fi on/off buttons. IEEE 802.11 b/g/n 2.4 GHz. Four (4) Fast Ethernet ports. Wi-Fi Protected Access (WPA/WPA2-PSK) and WEP. Intrusion detection and prevention (IDS). Denial-of-service (DoS) attack prevention. Smart Wizard installation CD. Push 'N' Connect using Wi-Fi Protected Setup (WPS)1. Dimensions: 173 x 128 x 33 mm (6.81 x 5.04 x 1.30 in). Security: Wi-Fi Protected Access (WPA2-PSK, WPA-PSK) and WEP WPA/WPA2: WPA2 Wireless Data Rates: Up to 300Mbps Wireless Adapter included: No Dimensions: 6.81" x 5.04" x 1.3" Weight: 0.65 lbs. Features: Wireless-N provides higher speed and better range than your old DSL equipment ReadySHARE—USB port provides fast and easy access for sharing an external USB storage device Push 'N' Connect securely connects devices at the touch of a button Built-in ADSL2+ modem for use with DSL Broadband (through the telephone line) Smart Wizard installation CD with multi-language support makes setup easy Power Adapter Warranty : 1 year Parts: 1 year limited |
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DSL Modem $71.7 High Quality Content by WIKIPEDIA articles A Digital Subscriber Line modem is a device used to connect a computer or router to a telephone circuit that has Digital Subscriber Line service configured. Like other modems, it is a type of transceiver. It is also called a DSL Transceiver or ATUR. The acronym NTBBA, which stands for network termination broad band adapter, is also common in some countries. Author: Miller, Frederic P./ Vandome, Agnes F./ McBrewster, John Binding Type: Paperback Number of Pages: 88 Publication Date: 2010/12/24 Language: English Dimensions: 6.00 x 9.02 x 0.21 inches |
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DSL $34.99 Top-notch advice on adopting DSL DSL is exploding, with fifteen million fast Internet connections in 2001 and probably forty million more by 2003. The editors of DSL Prime, the weekly "industry bible," brief you on exactly what you need to know to put the technology to use. The book moves rapidly from the basics of the equipment through security, applications, and network management. With the authority of the industry's key periodical, Bourne and Burstein provide candid evaluations of the providers and manufacturers and offer technical managers a no-nonsense guide to make sound strategic decisions on DSL, reduce costs, and ensure a system that will run reliably and smoothly. Wiley Tech Briefs Focused on the needs of the corporate IT and business manager, the Tech Briefs series provides in-depth information on a new or emerging technology, solutions, and vendor offerings available in the marketplace. With their accessible approach, these books will help you get quickly up-to-speed on a topic so that you can effectively compete, grow, and better serve your customers. |
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Modem $114.71 Modem. Modulation, Demodulation, Frequency shift keying, Cable modem, DSL modem, Serial communication, Radio modem, Wavelength division multiplexing, Phase shift keying, Duplex (telecommunications), Hayes Microcomputer Products, Hayes command set, Bulletin board system, Softmodem, SupraFAXModem 14400, Wireless modem, General Packet Radio Service, Universal Mobile Telecommunications System, Evolution Data Optimized, WiMAX, Orthogonal frequency division multiplexing Author: Miller, Frederic P./ Vandome, Agnes F./ McBrewster, John Binding Type: Paperback Number of Pages: 152 Publication Date: 2009/10/08 Language: English Dimensions: 5.98 x 9.01 x 0.35 inches |
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