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Topic: XDSL

	[No title] (Site not responding. Last check: 2007-10-08)
		The record indicates that incumbents that provide their own xDSL services on the same line that they are providing analog voice service are utilizing the single copper pair in the same manner as if the incumbent's voice service shared the line with a competitive carrier's data service.
		Specifically, after the xDSL traffic has passed though the splitter and into the output copper wire pair, it may be routed to a competitive carrier's DSLAM collocated in the incumbent's central office.
		Where incumbent LECs provide shared-loop xDSL services to their voice customers, either through their own subsidiaries or in cooperation with an unaffiliated ISP, the incumbent must resolve many of the same problems that they claim stand in the way of providing competitors with access to the high frequency portion of the loop.
	www.fcc.gov /Bureaus/Common_Carrier/Orders/1999/fcc99355.txt (18900 words)

	Test xdsl
		All too often not considered within the scope of xDSL simply because ISDN is the commonly used terminology and has been internationally in use for many years.
		In most cases we are dealing with a legacy infrastructure and topology which, because of bridge taps, mis-matching and the general degradation of the electrical characteristics of the line, may not be capable of supporting DSL services efficiently.
		In the xDSL world, the interference between nearby cables can have a negative impact on the performance of the affected cable(s).
	www.testxdsl.com (2123 words)

	xDSL FAQ (Site not responding. Last check: 2007-10-08)
		xDSL is the name which as been coined for the family of digital subscriber line technologies ranging from ADSL to SDSL.
		However, an xDSL access network will be an overlay network and therefore will not require the expensive and time-consuming switch upgrades that held ISDN back for so long.
		All major xDSL vendors belong to the ADSL Forum and set aside their differences while working together to create system guidelines and market positions.
	home.iwc.net /xdslfaq.htm (1147 words)

	IPv6 over xDSL
		If the xDSL modem is operated in the bridge mode, the IP packets have to be encapsulated in PPP and PPPoE for the transmission between PC and BB-RAR.
		When examining the xDSL modem we have to distinguish whether the modem is operated in the bridge mode or the router mode.
		This is due to the required adaptation of the xDSL modem as well as the present draft status of the IPv6 realisation of DCHP.
	www.eurescom.de /~public-web-deliverables/P1100-series/P1113/D1/31_xdsl.html (1641 words)

	Digital Subscriber Line (DSL)
		xDSL is drawing significant attention from implementers and service providers because it promises to deliver high-bandwidth data rates to dispersed locations with relatively small changes to the existing telco infrastructure.
		xDSL services are dedicated, point-to-point, public network access over twisted-pair copper wire on the local loop ("last mile") between a network service provider (NSP's) central office and the customer site, or on local loops created either intra-building or intra-campus.
		Currently the primary focus in xDSL is the development and deployment of ADSL and VDSL technologies and architectures.
	www.cisco.com /univercd/cc/td/doc/cisintwk/ito_doc/adsl.htm (3937 words)

	Aware, Inc. - Glossary of DSL-Related Terms (Site not responding. Last check: 2007-10-08)
		In xDSL and in most dial up modem communications, asynchronous communications are often found in Internet access and remote office applications.
		Typically, in xDSL, latency refers to the delay in time between the sending of a unit of data at one end of a connection, until the receipt of that unit at the destination.
		DSL (xDSL), where "x" represents the type of technology, is a point to point network that allows the existence of more than one transmission over standard twisted pair copper wire.
	www.aware.com /products/DSL/glossary.htm (5594 words)

	What is xDSL? - A Word Definition From the Webopedia Computer Dictionary
		They are sometimes referred to as last-mile technologies because they are used only for connections from a telephone switching station to a home or office, not between switching stations.
		xDSL is similar to ISDN inasmuch as both operate over existing copper telephone lines (POTS) and both require the short runs to a central telephone office (usually less than 20,000 feet).
		However, xDSL offers much higher speeds - up to 32 Mbps for upstream traffic, and from 32 Kbps to over 1 Mbps for downstream traffic.
	www.webopedia.com /TERM/x/xDSL.html (234 words)

	xDSL TECHNOLOGY (Site not responding. Last check: 2007-10-08)
		xDSL is a modem technology, enabling high-speed delivery of data, audio, and video in a digital form over the existing telephone infrastructure (copper twisted-pair phone lines called the local loop which connects the customer premises and the carrier’s central office).
		RDSL is a rate adaptive xDSL technology, which means that it can work at different data rates depending on the length of the line and thus, it can overcome the distance limitations for xDSL to a certain extent.
		In the future, as xDSL technologies are deployed in high volume, there will be a need for a new way to funnel data from the modems to the backbone.
	www.hkkk.fi /mmedia/itp97/reports/report1.html (5017 words)

	xDSL
		xDSL is used to push high bit rates through copper wires that run from point A to point B. For most people, point A will be their home and point B will be the other end of the copper phone wire, that is the substation of the local phone company.
		Because the other end of your xDSL connection has to be at the local phone company, the choice of which xDSL protocol your modem should support is made for you: whatever the local phone company dictates.
		PCIRunner xDSL internal modem card or the SpeedRunner 204 (which is now being called the Cisco 675) standalone (external) router (or "modem" as I've been calling it).
	www.abusar.org /xDSL.htm (9915 words)

	Digital Subscriber Line (xDSL) FAQ v20010108 (Site not responding. Last check: 2007-10-08)
		xDSL bypasses the CODECs at the central office by separating the xDSL signal and voice frequencies in a POTS splitter.
		The voice signal is passed to a CODEC while the xDSL signal terminates in a DSLAM, the xDSL equivalent of a CODEC.
		By simply placing xDSL modems at each end of the dry copper connection, a xDSL may be possible with little intervention from the perspective of the CO. However, this is a risky method of deploying xDSL, especially asymmetrical versions.
	www.faqs.org /faqs/datacomm/xdsl-faq (8729 words)

	FAQ: ADSL, HDSL, VDSL, DSL-Lite - what is this all about?
		Deployment of xDSL technologies is accelerating after a very slow and reluctant start by most telecom operators.
		There is a cost associated with deploying xDSL but its very small compared with the cost of digging up the roads to install cable.
		There are limits to the distance over which xDSL can be used, so that a home needs to be within a particular distance of the local exchange.
	www.eto.org.uk /faq/faqtterm.htm (1563 words)

	Comparing Cable to DSL (Site not responding. Last check: 2007-10-08)
		In some areas, you may be able to get xDSL service and ISP account as a package for about the same price as cable modem access.
		Or, alternative providers will be allowed to offer Internet service over cable and you will see the same price war that pushed ISP rates.
		Don't use the ISDN as a reference for xDSL.
	www.cablemodemhelp.com /compare.htm (609 words)

	DSL Modems and Products from pulse
		xDSL is a technology that allows high speed data transmission over existing copper cables that are already in place with most telephone companies, businesses and school campus grounds.
		The most mature xDSL technology is high-bit-rate DSL (HDSL).
		The combination of support for a symmetrical data flow and T1 throughput on a single line makes SDSL useful for applications like videoconferencing and some kinds of servers, where this distance reduction is not an issue.
	www.pulsewan.com /dsl.htm (993 words)

	xDSL.com : Current Headlines (Site not responding. Last check: 2007-10-08)
		We define xDSL (or DSL) as ADSL, HDSL, IDSL, MDSL, RADSL, SDSL, UADSL, and VDSL.
		The site serves as a resource for people with a general interest in xDSL and also as a public forum for discussion and useful information for people who play an integral role in the xDSL market.
		Sample business cases, xDSL deployment projections, and product/service comparisons are available to help you in your development and research efforts.
	www.xdsl.com /xdsl/aboutus.shtml (435 words)

	Cisco - xDSL Glossary (Site not responding. Last check: 2007-10-08)
		DMT employs rate adaptation and is used in the ANSI standard for xDSL technologies.
		IDSL-ISDN digital subscriber line---An xDSL technology that is basically a naming convention for an ISDN Basic Rate Interface (BRI), both B-channels and the D-channels permanently bonded for 144 Kbps over a single wire pair.
		The downstream bit rate of VDSL is the highest within the xDSL family: 52 Mbps.
	www.cisco.com /warp/public/cc/so/neso/dsso/global/glsy_ai.htm (6224 words)

	Cable Modem vs xDSL
		However, high cost, distance requirement and quality of phone wiring are some of the main problems that telcos need to address for bigger market expansion.
		It includes Introduction to xDSL, General xDS Information, What is Analog, the Local Loop and DSL Step-up and Configuration.
		Its xDSL Resource provides list of other good sites related with DSL and cable modem.
	www.jeffseaman.com /project/cable_dsl.html (1494 words)

	Using OpenBSD, xDSL, and PPPoE
		Knowing that OpenBSD is one of the most secure operating systems, you wisely chose to install an OpenBSD firewall between you and the Internet.
		External modems translate the xDSL packets into ethernet packets and are connected to the system via any supported ethernet card.
		Don't complain if your xDSL connection drops occasionally, remember that OpenBSD doesn't have really stable PPPoE drivers yet, but I have gone for hours without a problem, so it really isn't that bad.
	www.princeton.edu /~ferguson/adw/pppoe.shtml (457 words)

	CableModemInfo.Com FAQ
		When you use xDSL, the pipe to the Internet is "yours", and is not shared along the way to the C/O or Central office.
		Even xDSL modems, which use a section of the Phoneline for it's connection, do not usually interfere with these HomePNA products, and can be used at the same time.
		Since most people with a cable modem or xDSL will eventually share their connection with other PC's in the house, you should look into a Internet Sharing solution such as Sygate or Maybe a hardware device like the Umax Ugate.
	www.cablemodeminfo.com /CableModemFAQ.html (3371 words)

	XDSL Telecommunications Newsletter
		XDSL NEWS® is a monthly newsletter devoted to worldwide developments in digital subscriber line technologies, including XDSL, RDSL, SDSL, VDSL and HDSL Many technologies have been developed to increase the bandwidth and capabilities of the telephone network, but the “last mile” remains a bottleneck.
		XDSL technology can provide that bandwidth and is poised to make a significant impact on the telecommunications market over the next five years.
		Telephone companies, CAPs, ISPs and other telecom providers are all examining XDSL for a variety of data and video services, making XDSL the most exciting new technology in the market today.
	www.igigroup.com /nl/pages/adsltelecom.html (229 words)

	xDSL Wholesale (Site not responding. Last check: 2007-10-08)
		The ISP can then market the service to end-users as its own branded ADSL service, supply these to any subscriber within Belgium, and provide their own help-desk and support services.
		Belgacom provides for all the connection requirements at both the physical and the xDSL transport level, including the local loop, DSLAM, ATM transport, BAS and IMS, and collocation services.
		Providing an access line between the Belgacom xDSL Wholesale Access Point and the Customer Access Point, over a virtual path using ATM connectivity.
	www.belgacom.be /carrier/cbu/jsp/dynamic/product.jsp?dcrName=cbu_xDSLWholesale (310 words)

	Fast Guide to DSL - a Whatis.com definition - see also: DSL, xDSL, DSL Guide, Digital Subscriber Line (Site not responding. Last check: 2007-10-08)
		DSL (Digital Subscriber Line) is a technology for bringing high-bandwidth information to homes and small businesses over ordinary copper telephone lines.
		xDSL refers to different variations of DSL, such as ADSL, HDSL, and RADSL.
		Assuming your home or small business is close enough to a telephone company central office that offers DSL service, you may be able to receive data at rates up to 6.1
	searchnetworking.techtarget.com /sDefinition/0,,sid7_gci213915,00.html (1883 words)

	[20040326] DELIVERING XDSL
		With DSL, your customers will be able to surf the Net at lightning speed, download in a flash, enjoy high-quality video and audio streaming, multitask on a single line, videoconference, and get video and audio on demand, all across the phone lines they already have.
		Written by telecom experts Lawrence Harte and Roman Kikta, Delivering xDSL takes you inside this technology family for an incisive, unbiased look at every important dynamic of capability, cost, compatibility, and competitiveness and over 100 key applications.
		For telecom engineers, technicians, and managers who'd rather lead than phone it in-here are the detailed and easy-to-understand DSL answers you want to coax maximum leverage from your phoneline advantage.
	clarke.ticmundi.com /0-07-134837-9.html (673 words)

	Usenet replayer's FAQ collection: comp.dcom.xdsl
		xDSL is a generic abbreviation for the many flavors of DSL or
		in a DSLAM, the xDSL equivalent of a CODEC.
		A dry pair had no power applied to it from the CO and a "wet" one did.
	www.usenet-replayer.com /faq/comp.dcom.xdsl.html (6808 words)

	Results for 'xDSL'
		xDSL loops are not so predictable and stable as standard TIA cabling used for...
		xDSL are always on, no dial-up and no disconnection, no busy signal, simultaneous use of phone/fax...
		xDSL." In 2000, he was honored with the prestigious Fellow award by the Radio Club of America for his contributions to the wireless industry...
	odysseus.ieee.org /ieeesearch/query.html?qt=xDSL (1794 words)

	xDSL on Linux (Site not responding. Last check: 2007-10-08)
		All information on this site is about connecting to ISP´s or other IP providers using xDSL and ATM hardware and software under the Linux operating system.
		xDSL internet connections is an application of ATM where the physical interface is a DSL variant instead of LAN or fiber.
		This means that a number of established and well-proven protocols and software packages can be used at both the customer and provider location.
	www.x-dsl.hu /linux (100 words)

	xDSL Solutions
		With the emergence of ADSL2+ applications like video, Comtest Test Access and xDSL Splitters are becoming a critical component of the Network, with the ability to enhance services and solve problems.
		Our continual evolving product line of Comtest POTS, ISDN and Test Access solutions, are designed with issues such as improving performance, reducing crosstalk and increasing density while fully understanding the importance of keeping the cost per port as low as possible.
		Comtest Networks is a technical leader of Test Access products, xDSL Splitter products, specializing in innovative designs to meet the emerging needs worldwide.
	www.comtest.ca /access.htm (208 words)

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